A simple demonstration of the difference between an Ethernet hub and an Ethernet switch, and how this can get you into (temporary) trouble if you're not aware of how a switch works.
***** No. the hub will actually cause you to get IP conflicts on your network. The hub will work fine as long as only one device on it is operating at a time. But because it does not assign IP addresses to each device with DHCP, if you turn on two devices connected to a hub at the same time, they will start trying to use the same IP address and you will get IP conflict error messages. Go ahead, use a switch. They're cheap and you'll never even know it's there. Everything will just work.
+Steve Warren That's completely wrong. A hub (or switch) has NOTHING to do with assigning IP addresses - if you get you get duplicate IP addresses, there's something else wrong in you network.
+Steve Warren Hubs are more common then you think, alot of what is marketed as a switch today are really just hubs. a hub operates on layer 1, a switch operates on layer 2 of the OSI model. a hub passes date to every port attached, a real switch only sends the packet to the port that is leads to the destination of said packet.
I'm having problems with one of these; my new at t microcell and my internet will not work at the same time on this switch. it's either one or the other/not both at the same time!!!!!! it will take me days to figure this one out.......
so i have a hitron cgn3 with rogers and they always have strict nat types. so i bridge it to my asus 3x3 nat types are open but now i only have 4 ports and more than 4 electronics i want hard wired. how do i have a modem bridged to a router and than add this for 8 more ports?
+Pascal Lafrenière thanks for the reply all tho months later i still appreciate the response lol. just didn't know if it would work that easy. gonna order one now to try
yes, it's that easy, for a 8 port switch, you need to plug 1 to the router, and 7 other is for any devices. What is your router model, I can tell you if there is any issue.
Absolutely stellar video. I very rarely see such clear and concise tutorial videos for networking features. And the fact that it used a PLC and an HMI, as opposed to just a router and a PC like most videos on this make it excellent.
The only reason for the delay when switching the PLC to a new port is the fact that it almost never transmits on its own (possibly once every 5 minutes). If it was reconfigured to transmit a frame every few seconds, this wouldn't be an issue. (For example, if you had two full-fledged computers connected to the switch, those networking stacks are going to talk so frequently that there would be almost no delay when changing ports under pretty much any circumstances)
Wait, so for the switch, what if you want to plug in multiple devices? I am plugging in my wifi router and my ps4, and it is only recognizing which ever one I plug in first. The other port is blinking, but there is no actual connection being made.
Wow. nicely explained. This little piece of info will serve me well ;-) I just watched a video by Eli the Computer Guy, where he mentioned a bad point about a Buffalo Switch's loop detection. When the loop detection is switched on it had to be power cycled before the feature worked. He didn't mention why that would be the case. After watching this video I'm guessing it has something to do with what you just explained...detection of specific MAC address to specific port...nice
I can hear him loud and clear on my iPad with volume on 50%. So talk for yourself. It’s so lame to try to give your message more force by grouping yourself to “we”.
Switch. Hubs are obsolete. They will force your devices into half duplex, so they can only transmit or receive at a time, but switches can do both. Also, most hubs were only 10 Mb but, these days, switches are often 1 Gb or faster.
Thank you this is a wonderful video. HUB\SWITCH I'll be damned! I was about to loose my S*%$ so bad until I found this video. I just wanted to try a SRX200 HUB and made it more complicated by bridging two Ethernet cards.
It would have helped to show that a hub "talks" to all ports, and the switch doesn't bother other active hosts. There were no other active hosts to make that comparison. This vid makes it seem that a hub is a much better choice on a small network. I would like to know when the hubs' blind broadcasts becomes a detriment, and the switch becomes beneficial. Thanks for the vid.
Always, hubs cannot run in full duplex. Even for just 2 computers, a regular patch cable is better; they can handle full duplex. The only time you want a hub is for Wiresharking traffic from two computers in 1992, and even then there are better options.
great video thank you so much for clearing up my question. i had a question i have a cable modem with 4 outlets one for the cable and 3 for your use. now i have 5 computers all wired not wifi. i also have vonage internet phone that needs connected too. i have have twc fastest internet connection they offer for the home. it is 50 Mbps down and 10 Mbps up. so i could get a gigabit switch plug everything into it then one cable from the switch to the cable modem, correct? right now i have 2 computers and phone wired and 3 computers on wifi but i want all wired. so will the switch help me with connection and speed over using just the modem only? the switch i am looking at is TRENDnet TEGS16DG Gigabit GREENnet Switch. is this a good switch to buy? or what do you suggest? again thanks for your help.
Just love the so called experts (X being an unknown quantity and spert being a drip under pressure ) who just want to can this excellent demonstration on the differences between a switch and a hub. Ipreams is a good example of a know it all.
A switch can pick up is new connection (almost) as fast as a hub. It all depends of device configuration The only real difference between a hub and a (unmanaged) switch is collision avoidance.
This is just a cheap switch. Any decent switch will notice that it no longer has link on a port and therefore needs to rediscover which port any MAC addresses previously switched to that port are now on.
That hub would not be broadcasting to all 8 ports. It would broadcast to the other 7 and not the one the data comes in on. Also, your delay is an unusual situation. Normally, as soon as you plug into another port the DHCP sequence will run, letting the switch know where that MAC address is located. BTW, who uses hubs these days. I have a 10 Mb, 8 port hub I bought around 25 years ago, but haven't used in years. Even then, hubs were on the way out, with switches becoming more common. The only reason I went with a hub then was switches were still a lot more expensive. These days, an 8 port Gb switch can be had for about 1/4 what I paid for that hub.
Hi, I have a question. I have a Netgear gs108 Ethernet Switch (8-port) on my existing home network with a Comcast/ Xfinity cable modem. There are 2 Netgear Power XE104 line devices connected separately from the modem by ethernet cable through the circuit breaker to an outlet by the other Netgear Powerline XE104 device in the kitchen. It has no ethernet switches in the area. Only a 300 Amped Wireless Router on the kitchen table as a repeater. I need to replace it with a different model of the repeater. It only supports 2.4ghz. I need a dual-band repeater for the kitchen. One connection for the 50 inch Samsung tv, one connection for the Netgear Powerline Connection and one connection for my gaming systems. I need a larger amount of ethernet switch ports then what I have. Plus what is the best wireless/ethernet cable router currently available? I'm a gamer.
Interesting video! I never saw a switch taking 5 minutes to update it's mac table. Is this a cheap netgear issue? Usually when a switch inidicates a port up, it refreshes the mac table.
Thanks. but now that you explained the difference. it made a world of a difference. because I could NOT figure out why my brand new Linksys 8 port switch was all of a sudden slower than my older switch. as they in New England. "if you don't like the weather. wait 5 min " thanks
Hi just a question. I have two pc that needs to communicate internally and If I use a hub will it bypass my router modem configuration?(firewall etc) Right now my router is managed by my isp and I cant configure the ports to allow that my two pcs needs example port 5353. Im thinking if i use a hub it will by bypass my router config but atill be able to connecto to internet and also internally(without firewall blocking)
Thank you very much for the clear explanation.i am wondering if I can use two Ethernet switches at the same time. I have one switch plugged into the router directly upstairs and run a 100 feet Ethernet cable from that switch to a desktop computer in the basement. Can I split this cable by plug the end (in the basement) into the 2ND Ethernet switch and hook up 2 computers into that switch? will it work?
Soo i have a computer and xbox that id like to run my gig speed internet into. Which would be the one to use in my case? I just have one ethernet cable coming from my modem, and would like to get both my devices hardwired.
Unfortunately this does not work. If you move the master (HMI) cable to another port, the problem remains. Ethernet frames sent to the PLC still get sent to the old PLC port, until the timer times out or the switch is reset.
Bravo! I was asked this exact question last week by my boss at work and I didn't know. Funny how it's little understandings like this that stump even the best of us.
Another major difference between a Hub and a Switch is that a Hub is a layer 1 device which makes it as intelligent as an ethernet cable and a Switch is already on layer 2.
Sorry so it is wrong. Hub be technically parts of OSI 2, switch parts of OSI 2 or/and OSI 3. OSI Layer 1 be the physically cable self! A OSI Layer not mean the device must use all of them, it is only a theory plan, not more!
Wonderful Explanation! I figure that unless a *Ethernet* *Switch* is way faster than a *Ethernet* *Hub,* I'll go with a Hub. A Hub definetly sounds like it's a _"set & forget it"_ situation.
Can you even buy a hub these days? Most hubs were 10 Mb, though there were some at 100 Mb. Switches are often 1 Gb or more these days. You're also likely slowing down your Internet connection, unless you have a really slow one. I have 1 Gb switches here and I get 920 Mb down on my Internet connection.
I did not know the difference before now. So now I ask, I plan on purchasing either a 16 port or 24 port Switch or hub. I plan to hook up 4 PS3's, 3 lap tops, 3 streaming boxes, my home DirecTV internet modem, and a couple of Smart TV's. I have spectrum internet. The 60 variety. Will my system crash if I use them all at once?
If you use a gigabit switch, and have a fast enough ISP connection, you shouldn't have a problem. Forget using a hub. Period. Video didn't really adequately explain the major flaw of a hub, which is data collision. In video, he said that his HMI is broadcasting to all other ports, which is true. What he failed to mention is that in a hub, ALL connected devices broadcast to all ports. So, rather than one person in a room talking and everyone else being able to hear it, it's more like a bunch of people in a room all yelling at each other so loudly and so often that most people can't hear much of what any other person is saying. The more devices trying to use the same 'wire' to send signals at the same time, the greater the chances of data collisions, and the greater chance networking becomes all but impossible.
As someone else already mentioned, it's most likely because the PLC only transmits data when that data is requested, so it's not sending anything to the switch, which would immediately let the switch know which port it's connected to, and subsequently enabling the switch to update its MAC table.
Again to all the odinary persons her - technically works a switch same a hub. Both be same a multiple (switched) socket-outlet for your cables. The difference is that the hub call into all rooms in a hotel and a switch call only the correct room in a hotel. Exactly this demostration do you see live in this old schooling video from 2013!
+OldLordSpeedy except that he didnt show the major issues that arise with hubs that have alot of ports. even 8port hubs will run into collisions very very fast
I would expect when the cable is unplugged the switch would forget whatever MAC address it knew about. Can't say for certain though. For the switch to learn the MAC address, an Ethernet frame has to pass through it. Until then, it should broadcast to all ports. Also, consider that there may be another switch or hub between that switch and the computer that owns that MAC address. There's no way that switch could learn from plugging in the other switch or hub what the MAC addresses (yes, there could be more than one) are.
@@James_Knott Thank you for your answer. I am surprised that there isn't a discovery protocol in Ethernet. No offence, but I read what you wrote, and I thought, "That can't be right." But I looked into it, and it seems like the "best" that can be done is an ARP scan, and ... (shudder) ... There are a LOT of possible IP addresses. The idea of going through a few billion IP addresses this way, just to get the MAC address of the person you're talking to, is just horrifying. It seems that you are correct. The best it can do is just kind of -- pick up from the traffic, and maybe with ARP as a confirmation, -- what else is on the wire.
@@LionKimbro Of course I'm right. 🙂 If you consider there could be an entire network at the other end of that cable, you'll realize there's no way for any such discovery to work. However, normally, there'd soon be traffic to learn from again. BTW, if you think a few billion addresses is a lot, wait till you get to IPv6. With it, a LAN normally has 2^64 or 18.4 billion, billion addresses available. I get 2^72 IPv6 addresses from my ISP.
@@James_Knott Hm ... I would think that there would be a way to collect at least all devices (that were cooperating) that are actually link local. And then a switch operator could configure, "Am I going to broadcast the MAC addresses that I know about?" I think address discovery is just a generally useful thing. The operators, effectively, would determine how the switch operates, and make sure that multiple megabytes of data were not being routinely transferred. You wouldn't get the entire Internet's MAC addresses with a query.
@@James_Knott And very practically, it would be wonderfully useful to be able to, when something is plugged in, get some kind of a "Hello my name is..." That just seems practical.
Hi i have a netgear n600 modem/router dual band, there are two ethernet ports in the back. All of a sudden one of the ports stopped working after 2 months One is to my home security system and the other to my home security cameras. Instead of buying a new modem/router combo, do you suggest i buy a switch to connect to the port that is working or buy a whole new unit? thank you
TrottingFox Yes, that is precisely what a switch/hub would do. Like using a single LAN cable to connect internet to your PC, XBox and PS or other PC's. In addition, your PC and XBox/PS/other PC's would be able to communicate via switch/hub in case you want to transfer files for example. Switch would be faster than a hub, especially if you have high volume of traffic. Switches are a newer solution, hubs are becoming obsolete; you'd only want a hub in special cases like network diagnostics.
Hub: ALL communications from ALL ports are broadcast to ALL ports - major flaw is data collision (explain what this means) Switch: passes data from source port only to port associated with destination MAC address, ignoring all other ports You might wish to give brief explanation regarding OSI model and what 'MAC address' means. Especially since your video is aimed at people who might experience issues because they don't understand the difference between a hub and a switch.
10 years later and this helped me with my cyber security course I am currently taking for a certification! Never heard of a hub before and didn't even realize this feature of switches I've been using forever! I've always viewed switches the way I now know hubs work, thank you sir!
Forgot the most important difference.... Switches make Full-Duplex connections, and Hubs make Half-Duplex connections. That means a device cannot receive while transmitting on a Hub, so there's at least twice as much bandwidth with a Switch.
:50 So at about a 5 min fealty with 1 port, how long for all of the?. It's frkn amazing how much switches and networking components in general, can communicate with each other.. And great video explanation guy. I could've used this video long ago haha
Switches are intelligent devices, and the behavior is programmed intentionally. I have tried simmilar test, using Windows PCs, but the delay problem had not occured.
3:28 It seems that the way it's explained, the hub and switch are doing the same thing. He explains the Switch is sending messages to a specific MAC? It's unclear. I'm only beginning to research switches and hubs though my understanding of CS is far wider than my specific understanding of networking. So, is this Rather Desktop Unmanaged vs Desktop Web Managed? I'm asking, not stating, because I really don't know. Thanks.
Correct me if I'm wrong but when you moved the PLC blue cable from port 3 to port 4 and it don't communicate is because the switch will look at the source MAC address on it's MAC address table for that known source MAC address. If that source MAC address is on the switch MAC address table but was on port 3, the switch needs to wait 300 seconds (5 minutes) for the switch MAC address table to expire before it can log that same source MAC address to port 4.
3:54 Can this be cleared via unplugging and plugging or cycling the switch? (edit: 30 seconds later my question answers itself in the video, great coverage!) This makes sense though, does this also happen with household routers? I've often pondered this notion when changing slots while troubleshooting. Or even USB ports would this happen? I ask about USB ports because sometimes when troubleshooting a plug and play (pray) solution the drivers won't load and I have to reboot to see the "cannot find drivers online" message a second time because it will only alert once. Thanks.
The switch probably doesn’t see the PLC on the other port right away, because the PLC doesn’t transmit anything until it gets a request to do so. If you got a network device that’s a bit more talky, like a PC or laptop, it should start working again within seconds.
thank you. this is the clearest explanation of the differences between a switch and a hub that I have ever seen.
yup .. fantastic clear and crisp explanation
Hubs are pretty rare. Rule of thumb, if you find one, disconnect it and throw it away.
Steve Warren I got a laugh out of that.
Steve Warren I dont know what i laugh so hard to that lol... good one !
***** No. the hub will actually cause you to get IP conflicts on your network. The hub will work fine as long as only one device on it is operating at a time. But because it does not assign IP addresses to each device with DHCP, if you turn on two devices connected to a hub at the same time, they will start trying to use the same IP address and you will get IP conflict error messages. Go ahead, use a switch. They're cheap and you'll never even know it's there. Everything will just work.
+Steve Warren That's completely wrong. A hub (or switch) has NOTHING to do with assigning IP addresses - if you get you get duplicate IP addresses, there's something else wrong in you network.
+Steve Warren Hubs are more common then you think, alot of what is marketed as a switch today are really just hubs. a hub operates on layer 1, a switch operates on layer 2 of the OSI model. a hub passes date to every port attached, a real switch only sends the packet to the port that is leads to the destination of said packet.
Wow! Great explanation and demo...I never knew we had to reboot the switch! Thanks so much!
Great, simple explanation, thank you very much!
I'm having problems with one of these; my new at t microcell and my internet will not work at the same time on this switch. it's either one or the other/not both at the same time!!!!!! it will take me days to figure this one out.......
You are awesome :) Thank you for the video :)
ok i just bought a 24 port switch. Does it matter which port i use to plug the main feed
into from my home modem ?
can this connect 2 signals at once at gb speed expample desktop and laptop?
Thanks
If an Ethernet cable is going to a switch from my router. Can i connect a PC, PS3 and Xbox360 to it and get internet?
+Turboed Leo yes
Pascal Lafrenière thanks
+Turboed Leo You'll get more lag though, which could be important for online multi player gaming
Thanh Tran Even if i only use one console at a time or PC?
lol, it's about nanoseconds lag....
so i have a hitron cgn3 with rogers and they always have strict nat types. so i bridge it to my asus 3x3 nat types are open but now i only have 4 ports and more than 4 electronics i want hard wired. how do i have a modem bridged to a router and than add this for 8 more ports?
plug a switch on one of the router lan port
+Pascal Lafrenière thanks for the reply all tho months later i still appreciate the response lol. just didn't know if it would work that easy. gonna order one now to try
yes, it's that easy, for a 8 port switch, you need to plug 1 to the router, and 7 other is for any devices. What is your router model, I can tell you if there is any issue.
+Pascal Lafrenière Asus RT-AC66U Dual Band 3x3
+Pascal Lafrenière TP-LINK TL-SG1008D ordered that switch
nice video"
Absolutely stellar video. I very rarely see such clear and concise tutorial videos for networking features. And the fact that it used a PLC and an HMI, as opposed to just a router and a PC like most videos on this make it excellent.
The only reason for the delay when switching the PLC to a new port is the fact that it almost never transmits on its own (possibly once every 5 minutes). If it was reconfigured to transmit a frame every few seconds, this wouldn't be an issue. (For example, if you had two full-fledged computers connected to the switch, those networking stacks are going to talk so frequently that there would be almost no delay when changing ports under pretty much any circumstances)
+lpreams
I was thinking this as well.
You made a better video than what 99.99% of the other people have made! Thank you!
I didn't know any of this. This is very helpful information. Thank You
Explained very well. you should be an instructor....I always wondered what the difference was ..
Wait, so for the switch, what if you want to plug in multiple devices? I am plugging in my wifi router and my ps4, and it is only recognizing which ever one I plug in first. The other port is blinking, but there is no actual connection being made.
I appreciate the “plain English” explanation!
Thank you! You are an amazing teacher. That was so clear, it was a pleasure to watch!
Do you know where I could buy an actual HUB and not a switch nowadays?
Excellent!. "Show and Tell" proves its worth once again. How or why did we ever get away from it in teaching?. Thanks!
Wow. nicely explained. This little piece of info will serve me well ;-)
I just watched a video by Eli the Computer Guy, where he mentioned a bad point about a Buffalo Switch's loop detection. When the loop detection is switched on it had to be power cycled before the feature worked. He didn't mention why that would be the case. After watching this video I'm guessing it has something to do with what you just explained...detection of specific MAC address to specific port...nice
MJ D Exactly. Here many so-called "Computer Experts" at TH-cam, and over thousend use the comment section of TH-cam too!
Thank you, really well explained. I'm getting ready for final, and learning this really helps. I prefer visual over textbook. thank you again.
Speak up man we can't hear you!
your computer doesn't have volume options?
I can hear him loud and clear on my iPad with volume on 50%. So talk for yourself. It’s so lame to try to give your message more force by grouping yourself to “we”.
hi. I have 6 ethernet devices. I want them to reach full speed, what should I choose?switch or hub.thanks
Switch. Hubs are obsolete. They will force your devices into half duplex, so they can only transmit or receive at a time, but switches can do both. Also, most hubs were only 10 Mb but, these days, switches are often 1 Gb or faster.
Thank you this is a wonderful video. HUB\SWITCH I'll be damned! I was about to loose my S*%$ so bad until I found this video. I just wanted to try a SRX200 HUB and made it more complicated by bridging two Ethernet cards.
One reason I use managed switches. I can tag ports or create VLANS...
wow, thanks for the vid, i wasn't sure what the difference was but have always used switches anyway. Well explained :)
that power cycle tip when moving a port is gold!!! as always a brilliant explanation /lesson,thanks for recording uploading.
I actually learned something. thank you a lot!
nice video presentation thank you.
In my network of computers even when i move any plug the switch work right away for some reason
It would have helped to show that a hub "talks" to all ports, and the switch doesn't bother other active hosts. There were no other active hosts to make that comparison. This vid makes it seem that a hub is a much better choice on a small network. I would like to know when the hubs' blind broadcasts becomes a detriment, and the switch becomes beneficial. Thanks for the vid.
Always, hubs cannot run in full duplex. Even for just 2 computers, a regular patch cable is better; they can handle full duplex. The only time you want a hub is for Wiresharking traffic from two computers in 1992, and even then there are better options.
thank you for this....thanks a lot
great video thank you so much for clearing up my question. i had a question i have a cable modem with 4 outlets one for the cable and 3 for your use. now i have 5 computers all wired not wifi. i also have vonage internet phone that needs connected too. i have have twc fastest internet connection they offer for the home. it is 50 Mbps down and 10 Mbps up. so i could get a gigabit switch plug everything into it then one cable from the switch to the cable modem, correct? right now i have 2 computers and phone wired and 3 computers on wifi but i want all wired. so will the switch help me with connection and speed over using just the modem only? the switch i am looking at is TRENDnet TEGS16DG Gigabit GREENnet Switch. is this a good switch to buy? or what do you suggest? again thanks for your help.
Switch optimizes privacy Hub optimizes sharing, any questions?
I'm trying to connect my gaming pc and my steam link that I use to stream the pc to my router which would be best switch or hub?
+RedArmyNova get a switch
Just love the so called experts (X being an unknown quantity and spert being a drip under pressure ) who just want to can this excellent demonstration on the differences between a switch and a hub. Ipreams is a good example of a know it all.
A switch can pick up is new connection (almost) as fast as a hub. It all depends of device configuration
The only real difference between a hub and a (unmanaged) switch is collision avoidance.
great explanation....it helps to explain in pratice
Excellent video and explanation. Your explanation, along with the physical demonstration, was extremely helpful. Thanks!
Thank you. I couldnt figure out why my new switch wouldn't work. all I had to do was reset it.
This is just a cheap switch. Any decent switch will notice that it no longer has link on a port and therefore needs to rediscover which port any MAC addresses previously switched to that port are now on.
That hub would not be broadcasting to all 8 ports. It would broadcast to the other 7 and not the one the data comes in on. Also, your delay is an unusual situation. Normally, as soon as you plug into another port the DHCP sequence will run, letting the switch know where that MAC address is located.
BTW, who uses hubs these days. I have a 10 Mb, 8 port hub I bought around 25 years ago, but haven't used in years. Even then, hubs were on the way out, with switches becoming more common. The only reason I went with a hub then was switches were still a lot more expensive. These days, an 8 port Gb switch can be had for about 1/4 what I paid for that hub.
Excellent video! Thanks for sharing.
Hi, I have a question. I have a Netgear gs108 Ethernet Switch (8-port) on my existing home network with a Comcast/ Xfinity cable modem. There are 2 Netgear Power XE104 line devices connected separately from the modem by ethernet cable through the circuit breaker to an outlet by the other Netgear Powerline XE104 device in the kitchen. It has no ethernet switches in the area. Only a 300 Amped Wireless Router on the kitchen table as a repeater. I need to replace it with a different model of the repeater. It only supports 2.4ghz. I need a dual-band repeater for the kitchen. One connection for the 50 inch Samsung tv, one connection for the Netgear Powerline Connection and one connection for my gaming systems. I need a larger amount of ethernet switch ports then what I have. Plus what is the best wireless/ethernet cable router currently available? I'm a gamer.
Interesting video! I never saw a switch taking 5 minutes to update it's mac table. Is this a cheap netgear issue? Usually when a switch inidicates a port up, it refreshes the mac table.
Thanks. but now that you explained the difference. it made a world of a difference. because I could NOT figure out why my brand new Linksys 8 port switch was all of a sudden slower than my older switch.
as they in New England. "if you don't like the weather. wait 5 min " thanks
Hi just a question. I have two pc that needs to communicate internally and If I use a hub will it bypass my router modem configuration?(firewall etc) Right now my router is managed by my isp and I cant configure the ports to allow that my two pcs needs example port 5353. Im thinking if i use a hub it will by bypass my router config but atill be able to connecto to internet and also internally(without firewall blocking)
Excellent! Very useful.
Thanks for posting.
Thank you very much for the clear explanation.i am wondering if I can use two Ethernet switches at the same time. I have one switch plugged into the router directly upstairs and run a 100 feet Ethernet cable from that switch to a desktop computer in the basement. Can I split this cable by plug the end (in the basement) into the 2ND Ethernet switch and hook up 2 computers into that switch? will it work?
Good Demonstration I learn something something today
Great video. Thank you! Explained exactly what I was wanting to know!
Soo i have a computer and xbox that id like to run my gig speed internet into. Which would be the one to use in my case? I just have one ethernet cable coming from my modem, and would like to get both my devices hardwired.
Thanks man for making this video. I learned a great deal by seen this.
If you are going to "educate" the public, you might want to define your acronyms before you use them the first time. PLC? etc.
This has to be the clearest explanation of hubs/switches on the net :)
Thank you :D
you superb eli thanks for your help and one more thing i want to know "how a packet travel from private ip sender to private ip receiver " pls help me
best video i've ever seen about the differences , thank you
Just log into the switch and clear the ARP entry for the old port. No piwer cycle
Unfortunately this does not work. If you move the master (HMI) cable to another port, the problem remains. Ethernet frames sent to the PLC still get sent to the old PLC port, until the timer times out or the switch is reset.
excellent, I've learned something today. Always a good thing.
amazing! finally I understood the diference! very thanks man!
Bravo! I was asked this exact question last week by my boss at work and I didn't know.
Funny how it's little understandings like this that stump even the best of us.
my is anil i m having problems in my net works vise problem total line problem howto find out this problems
it is a very claer explanation. why 220 idiots didnt like it :D
Another major difference between a Hub and a Switch is that a Hub is a layer 1 device which makes it as intelligent as an ethernet cable and a Switch is already on layer 2.
Sorry so it is wrong. Hub be technically parts of OSI 2, switch parts of OSI 2 or/and OSI 3. OSI Layer 1 be the physically cable self! A OSI Layer not mean the device must use all of them, it is only a theory plan, not more!
very clear but what is the point of all of this hub and switches and all of the ports???
Thanks! That was a very informative.
That was an incredibly good explanation. Thanks!
Wonderful Explanation! I figure that unless a *Ethernet* *Switch* is way faster than a *Ethernet* *Hub,* I'll go with a Hub. A Hub definetly sounds like it's a _"set & forget it"_ situation.
Can you even buy a hub these days? Most hubs were 10 Mb, though there were some at 100 Mb. Switches are often 1 Gb or more these days. You're also likely slowing down your Internet connection, unless you have a really slow one. I have 1 Gb switches here and I get 920 Mb down on my Internet connection.
Most simple explanation !! Thank you
The best video I've ever seen. Well explained.
So a Hub is just a pretty stupid version of a Switch ...
I did not know the difference before now. So now I ask, I plan on purchasing either a 16 port or 24 port Switch or hub. I plan to hook up 4 PS3's, 3 lap tops, 3 streaming boxes, my home DirecTV internet modem, and a couple of Smart TV's. I have spectrum internet. The 60 variety. Will my system crash if I use them all at once?
If you use a gigabit switch, and have a fast enough ISP connection, you shouldn't have a problem.
Forget using a hub. Period. Video didn't really adequately explain the major flaw of a hub, which is data collision.
In video, he said that his HMI is broadcasting to all other ports, which is true. What he failed to mention is that in a hub, ALL connected devices broadcast to all ports. So, rather than one person in a room talking and everyone else being able to hear it, it's more like a bunch of people in a room all yelling at each other so loudly and so often that most people can't hear much of what any other person is saying.
The more devices trying to use the same 'wire' to send signals at the same time, the greater the chances of data collisions, and the greater chance networking becomes all but impossible.
That was a great video.
Yikes. I've never had that problem with a switch. But then again, I'm talking strictly computer networks, not industrial control stuff.
As someone else already mentioned, it's most likely because the PLC only transmits data when that data is requested, so it's not sending anything to the switch, which would immediately let the switch know which port it's connected to, and subsequently enabling the switch to update its MAC table.
Again to all the odinary persons her - technically works a switch same a hub. Both be same a multiple (switched) socket-outlet for your cables. The difference is that the hub call into all rooms in a hotel and a switch call only the correct room in a hotel. Exactly this demostration do you see live in this old schooling video from 2013!
+OldLordSpeedy except that he didnt show the major issues that arise with hubs that have alot of ports. even 8port hubs will run into collisions very very fast
Why does it take 5 minutes? Why can't the switch tell that something was plugged in, and then immediately go, "Hey, who are you?"
I would expect when the cable is unplugged the switch would forget whatever MAC address it knew about. Can't say for certain though. For the switch to learn the MAC address, an Ethernet frame has to pass through it. Until then, it should broadcast to all ports. Also, consider that there may be another switch or hub between that switch and the computer that owns that MAC address. There's no way that switch could learn from plugging in the other switch or hub what the MAC addresses (yes, there could be more than one) are.
@@James_Knott Thank you for your answer. I am surprised that there isn't a discovery protocol in Ethernet. No offence, but I read what you wrote, and I thought, "That can't be right." But I looked into it, and it seems like the "best" that can be done is an ARP scan, and ... (shudder) ... There are a LOT of possible IP addresses. The idea of going through a few billion IP addresses this way, just to get the MAC address of the person you're talking to, is just horrifying. It seems that you are correct. The best it can do is just kind of -- pick up from the traffic, and maybe with ARP as a confirmation, -- what else is on the wire.
@@LionKimbro Of course I'm right. 🙂
If you consider there could be an entire network at the other end of that cable, you'll realize there's no way for any such discovery to work. However, normally, there'd soon be traffic to learn from again.
BTW, if you think a few billion addresses is a lot, wait till you get to IPv6. With it, a LAN normally has 2^64 or 18.4 billion, billion addresses available. I get 2^72 IPv6 addresses from my ISP.
@@James_Knott Hm ... I would think that there would be a way to collect at least all devices (that were cooperating) that are actually link local. And then a switch operator could configure, "Am I going to broadcast the MAC addresses that I know about?" I think address discovery is just a generally useful thing. The operators, effectively, would determine how the switch operates, and make sure that multiple megabytes of data were not being routinely transferred. You wouldn't get the entire Internet's MAC addresses with a query.
@@James_Knott And very practically, it would be wonderfully useful to be able to, when something is plugged in, get some kind of a "Hello my name is..." That just seems practical.
Hi
i have a netgear n600 modem/router dual band, there are two ethernet ports in the back. All of a sudden one of the ports stopped working after 2 months One is to my home security system and the other to my home security cameras. Instead of buying a new modem/router combo, do you suggest i buy a switch to connect to the port that is working or buy a whole new unit? thank you
Balada NYC Buy a 1 Gbit/s unmagement switch, connect one port to the router, one to your cam, and one to your security system.
Best explanation 100% in a practical situation ! 161 dislike at the time of this comment i guess they do not understand English.
Very bad tone volume,but it's interesting.
STOP SAYING "SO" AND "HERE" so often!!!!!!!!!!!!
Thank you. Very clear explanation.
Thank you sir.
Great explanation and demonstration of the benefits and disadvantages, thanks!
So, if i plug 1 Ethernet cable from a router to a switch will it bring Ethernet signal to all of the things plugged into the switch right?
TrottingFox Yes, that is precisely what a switch/hub would do. Like using a single LAN cable to connect internet to your PC, XBox and PS or other PC's. In addition, your PC and XBox/PS/other PC's would be able to communicate via switch/hub in case you want to transfer files for example. Switch would be faster than a hub, especially if you have high volume of traffic. Switches are a newer solution, hubs are becoming obsolete; you'd only want a hub in special cases like network diagnostics.
Hub: ALL communications from ALL ports are broadcast to ALL ports - major flaw is data collision (explain what this means)
Switch: passes data from source port only to port associated with destination MAC address, ignoring all other ports
You might wish to give brief explanation regarding OSI model and what 'MAC address' means. Especially since your video is aimed at people who might experience issues because they don't understand the difference between a hub and a switch.
Loupeng hmdi connector and cable
10 years later and this helped me with my cyber security course I am currently taking for a certification! Never heard of a hub before and didn't even realize this feature of switches I've been using forever! I've always viewed switches the way I now know hubs work, thank you sir!
how to share pc with device ps2208b
Forgot the most important difference.... Switches make Full-Duplex connections, and Hubs make Half-Duplex connections. That means a device cannot receive while transmitting on a Hub, so there's at least twice as much bandwidth with a Switch.
This problem is switch firmware related on your NIC firmware as this is not how it should behave. Are you using a connectionless protocol like UDP?
:50 So at about a 5 min fealty with 1 port, how long for all of the?. It's frkn amazing how much switches and networking components in general, can communicate with each other.. And great video explanation guy. I could've used this video long ago haha
Switches are intelligent devices, and the behavior is programmed intentionally. I have tried simmilar test, using Windows PCs, but the delay problem had not occured.
3:28 It seems that the way it's explained, the hub and switch are doing the same thing. He explains the Switch is sending messages to a specific MAC? It's unclear. I'm only beginning to research switches and hubs though my understanding of CS is far wider than my specific understanding of networking. So, is this Rather Desktop Unmanaged vs Desktop Web Managed? I'm asking, not stating, because I really don't know. Thanks.
Correct me if I'm wrong but when you moved the PLC blue cable from port 3 to port 4 and it don't communicate is because the switch will look at the source MAC address on it's MAC address table for that known source MAC address. If that source MAC address is on the switch MAC address table but was on port 3, the switch needs to wait 300 seconds (5 minutes) for the switch MAC address table to expire before it can log that same source MAC address to port 4.
3:54 Can this be cleared via unplugging and plugging or cycling the switch? (edit: 30 seconds later my question answers itself in the video, great coverage!) This makes sense though, does this also happen with household routers? I've often pondered this notion when changing slots while troubleshooting. Or even USB ports would this happen? I ask about USB ports because sometimes when troubleshooting a plug and play (pray) solution the drivers won't load and I have to reboot to see the "cannot find drivers online" message a second time because it will only alert once. Thanks.
The switch probably doesn’t see the PLC on the other port right away, because the PLC doesn’t transmit anything until it gets a request to do so. If you got a network device that’s a bit more talky, like a PC or laptop, it should start working again within seconds.