ERRATA: 32:16 The 'ntp authenticate' command isn't needed to enable NTP authentication. It is only needed when using 'ntp passive', 'ntp broadcast client' or 'ntp multicast client' - all beyond the scope of the CCNA exam. Check out www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-cr-book/bsm-cr-n1.html#wp2231112076 for more information. To be fair, lots of other Cisco documentation and CCNA study materials state that this command is necessary, but that seems to be a misunderstanding. Try it out on some Cisco routers and you'll see it's not necessary!
Hello Jeremy and anyone finding this course helpful. I passed my CCNA last night and I can say that this course helped more than any other resource. For those preparing, who have taken CompTIA, this is far different than them. I had 86 questions and 4 labs, you can only move forward in the test, no flagging for review, no going back to change an answer so be prepared for that. I commented on the NTP video because 3 of my 4 questions had NTP setup with peers and clients. Two had setting up SSH connections. One was all VLANS and trunking. I got none on OSPF or STP which is where I spent the majority of my practice after reading about others experiences. I also used Boson practice tests. I also had quite a few regular questions on Wireless LAN setup and SDN. SDN was actually my strongest category which was strange since in Boson tests, Security was always my strongest, in the exam it was my weakest. Either way, thanks Jeremy! These are the best video resources and I commend you for taking the time to create these and all the resources and labs and provide them for free.
whoever's studying and has come across this video on NTP... don't sleep on it! I was super confident on my ccna exam but I skipped over NTP during my studies because I felt it wasn't a huge topic to go into... i got like 5 questions that were related to NTP and I'm pretty sure I bomb'd them all. I got a 823 because of it and just missed the exam by 2 points LOL. I'll get it next time.... !!!
@@DaddyDagoth I dont think we need to know about the manual configuration.. the exam topics clearly states we need to be able to configure and verify NTP operating in client and server mode.. This definitely shouldnt be a 40 min video
@@DaddyDagoth It is a very important security, performance and auditing feature. Lots of hackers attempt to screw up the timers and date/time stamps so you cannot see what was done in logs. Furthermore, having accurate and verified time stamps will increase the performance of the network. NTP is super super important. Learn thoroughly.
Being your channel members for years, I now can finally say i passes my CCNA exam last week !!! thank you so much Jeremy for providing this complete course as I wouldn't have made it without your effort To those who are preparing CCNA, just wanna share with you guys that the exam would contain 2-3 lab question which need you to do some hands on configuration, mine was involving in OSPF, ether channel and NTP and of course they carry huge portion of the marks so be prepare if you wanna score well : )
Welcome to Jeremy's IT Lab, today we'll learn about Jeremy's country of origin & Country of residency. Jeremy was born in Canada, but this is an old technology and nobody uses it, Jeremy moved to Japan because their network is much faster.
As a long time network admin, time synchronization is critical to a healthy network across all devices! Others have thought of skipping this topic. I would suggest giving this video the time it deserves! (pun intended!).
Great video and one thing I would like to add is NTP dependency on L4 protocol and port. NTP uses UDP port 123 as both source and destination ports. It’s a fancy port number and easy to remember.
At this point i am just overwhelmed. I feel like the amount of information stored in my brain will flood out just like a switch floods out unknown unicast frames. So many mac addresses to remember and so many commands that are, is it just because I have not started my revision ( as i plan to finish the series first and then revise myself by using boson and revise the topics whose answer I fail to answer correctly. Ps I USE THE ANKI FLASH CARDS but at this point i think theres so much to remember and also 20 more videos info, commands, concepts.
hahahhahahha like a switch flood out unicast frame, my brother that comment made me chuckle. Kinda in the same position, but I will continue watching and labbing.. targeting it in november, come on man, were all gonna make it
I know this was a year ago, but for anyone else reading this, remember that your brain is capable of storing and automating so many more things than you would think. I used to think the exact same thing this guy did. Think about how many different words you know, the random facts you know about a video game or tv show or something, people from decades ago you still might remember, all of that literally gets stored in your brain and we can still recall it years and years later. Your brain is not something that gets worse with use, it's actually more like a knife that gets rusted when you don't use it, and sharpened when you do. The more you use it and commit short term memory to your long term memory, the better it gets at doing it and the more you're actually able to learn and remember. Think of your brain like a hard drive that actually increases in size when you use it. This isn't even me just saying stuff to make you feel better, it's all very well studied. Trust your brain, get a bunch of reps in and go over this stuff multiple times (Do labs, flash cards, practice tests, read books/watch other videos as well if you need in addition to these, watch these ones back over, etc) and it will stick. Just takes time and practice and consistency.
NTP is also super important for users of the network. I bought a cheap router thinking I had got an amazing deal. It had issues syncing with the ntp server and certain services that had higher security requirements (like splashtop) were dropping packets from my network. I suspect this is to prevent replay attacks, regardless of the reason poorly configured NTP will break a lot.
Thank you so much Jeremy, your videos are always the best, may God give you the strength to keep on supporting us with your super informative resources.👏👏
Finally finished this topic as well. most difficult thing about this topic is packet tracer don't have some of the commands. So, I had to practice on Cisco CML.😀
Thank you Jeremy, your lessons are very simple and very productive, they helps me very much. I am going to pass exam after a month and it breaks my heart that i can not complete whole course :(
Thank you Jeremy for uploading all of your videos. I watch them all. I am confident understanding related to networking. However I'm working on Fiber Optic System. More power to you Sir!
Thanks, Jeremy another great learning video! You and David Bombal are my inspiration to keep learning in regards to networking. I'm looking forward to your next video any hint? 😊✌
37:04 i thought it was D since in the video when u didnt specify it was 7 and would show 8 in ntp status. so i thought if we specify 8 then it would show 8 here and 9 in status..
For your final example : why it is not D ? ntp server {address | hostname}: NTP client/server mode-the device acts as both client and server. First, it acts as an NTP client, to synchronize time with a server. Once synchronized, the device can then act as an NTP server, to supply time to other NTP clients.
Are you asking about the Boson example? 'NTP SERVER x.x.x.x' configures the device to synchronize its time to the server specified in the command. This is static client mode. After synchronizing to that server it CAN be a server for other NTP clients, but in this case A is definitely the more correct answer.
How is one suppose to memorize the overall Cisco commands for this 200-301???? The way the exam has been re-structure makes me think they trying to hinder people (mainly ones without any experience) from being successful on the exams. Good think we have Jeremy to guide us through.
The previous version actually required more knowledge of configurations/commands! This new version adds more theoretical stuff (although you do of course still need to know lots of configurations!)
Hi Jeremy, I would like to ask something, when we use ntp master command, the router will sync to its internal clock, the "internal" in this scenario means software clock or hardware calendar? thanks in advance
Thank you Jeremy. You're great as usual. I am starting to be worried about CCNA the amount of information to know is huge, and I am not being dramatic! The default stratum of ntp master is 7 or 8, this is something that I didn't understood. I've google It and I more confused I found this : "Default stratum level of router’s internal clock is 7"
When you use the 'ntp master' command, the router's NTP stratum level will be 8. It is syncing to itself (its internal clock), so in that case you can say the internal clock's stratum is 7.
Thank you Jeremy Sir 🙏 Instead of using 127.127.1.1 address for master clock. Can we specify any other loopback address to use as it's NTP master clock.
In the Anki Flashcards for this episode, there is a question about how to configure daylight saving time, and the answer says that start and end requires "day, weekday, month and time", but I believe it should be "week (first, last, number), weekday, month and time". Can you please check? Wouldn't like to mess that up on the exam... ;-)
At 12:42, shouldn't it be R1(config)# clock summer-time name recurring start end [offset] instead of R1(config)# clock summer-time recurring name start end [offset] ?
Thanks for the video and hardwork!!! Quick question. After tackling the ccna, what would you recommend next? I see videos where the devnet cert should be knocked out next, while others consider going straight for the ccnp, or even cloud certs.
For the NTP key-number does it have to match on both client and server? Obviously, the key itself has to be the same but can the numbers be different per machine?
Many thanks for the videos. how many additional videos do you plan to make ? i finished one different course which also helped much. I thought i can finish your videos earlier but it seems that you continue to help people in an understandable way and will not finish in short term.. Keep going..:) . I also recommend every lecturers to use touchscreen PC or a tablet to take not on the videos capturing screen. Upon saving pictures, it is easy to repeat . With doing so, i finished my 100+ videos in 15 days when repeating.. i also started your videos with same tactic. I recommend Epic Pen application to note on the screen...You also need a good smart pen to use on the PC screen. Good luck to all learners...
#Configuration *Global Configuration* *ntp server* _ip-address_ _[prefer]_ : Configures a Cisco device to synchronize its clock with a specific Network Time Protocol (NTP) server. The "ip-address" parameter is the IP address of the NTP server. The optional "prefer" keyword is used to indicate that this NTP server should be the primary source of time for the device. *ntp peer* _ip-address_ : Configures a Cisco device to synchronize its clock with a specific NTP peer. The "ip-address" parameter is the IP address of the NTP peer. *ntp update-calendar* : Updates the device's calendar with the current time obtained from the NTP server or peer. *ntp master* _[stratum]_ : Configures a Cisco device as an NTP master. The optional "stratum" parameter is used to specify the stratum level of the device. The lower the stratum level, the more accurate the time source. *ntp source* _interface_ : Specifies the interface from which the device should obtain its time source. #Show *Privileged EXEC* *show ntp associations* : Displays information about the NTP associations on a Cisco device. This includes the status of the associations, the IP address of the server or peer, and the stratum level. *show ntp status* : Displays the current status of the NTP service on a Cisco device. This includes the current time, the time source, and the stratum level. #Authentication *Global Configuration* *ntp authenticate* : Enables NTP authentication on a Cisco device. *ntp authentication-key* _key-number_ *md5* _key_ : Configures an NTP authentication key on a Cisco device. The "key-number" parameter is the number assigned to the key, "md5" specifies the type of key (MD5) and "key" is the key value. *ntp trusted-key* _key-number_ : Specifies the NTP authentication key that the device should use. *ntp server* _ip-address_ *key* _key-number_ : Configures a Cisco device to synchronize its clock with a specific NTP server and specify the key for authentication. *ntp peer* _ip-address_ *key* _key-number_ : Configures a Cisco device to synchronize its clock with a specific NTP peer and specify the key for authentication. #Clock *Global Configuration* *clock summer-time* _zone_ { _date month year hh:mm date month year hh:mm_ | *recurring* _week day month hh:mm week day month hh:mm_ } _[offset]_ : Configure system to switch to automatically daylight saving time. Offset is the number of minutes to add during the summer time. Enter dates in ascending order. *clock timezone* _zone hours-offset [minutes-offset]_ : To set the time zone for display.
Hello Jeremy, I would like to ask something about NTP. How can Routers, which are layer 3 devices, can communicate to a layer 7 level protocols? I am a bit confused about this. Maybe i misssed something. Your course is great. It is the reason i started learning networking. Thanks
I think im kind of retarded but I'll give this question a crack lmfao. Routers just forward packets to the destination it needs to reach via a next hop address if it has. I don't think it cares about communicating with anyhting beyond its layer as layer 7 is purely created by hosts that need whatever is going on over their lol. The routers job is just to make sure stuff is getting where it needs to be.
A Cisco IOS device (router, switch) can't sync directly to a stratum 0 device (an atomic clock). The best they can sync to is a stratum 1 server, so the IOS device will be stratum 2.
How many videos do you plan this Course to have ? How complete is it now ? Also, thank you so much for making the effort of publishing this amount of knowledge for free!
It seems Packet Tracer does not allow for the configuration of Day Light Savings, nor does it allow for the clock update-calendar and clcok read-calendar commands
Is there a downside to having several ntp servers specified? An example - we have switches configured as ntp servers syncing to an external server. But sometimes these are not configured correctly or have other issues. In some configurations of our networks t different locations, there may not be a ntp server switch, so the devices on the LAN sync directly to the external sources. It has been a source of confusion for people with inconsistent ntp server settings, so I'm wondering if it isn't the easiest to simply configure our standard switch IPs as wel as the external server IPS (so we'd have 4 ntp servers instead of 2) for every device and if they automatically pick the best one, I should be set right? Is there a downside to this configuration?
Thank you Jeremy Sir 🙏 I want to set the Time Zone of IST ( India Standard Time ) . Offset between UTC and IST is +5.30 ahead. So what should be the correct command.
I live in a country that has daylight savings, and I have no idea when it begins and ends exactly because every clock in my home does it on its own. I had to look it up lol
Hello Jeremy and anyone finding this course helpful. I passed my CCNA last night and I can say that this course helped more than any other resource. For those preparing, who have taken CompTIA, this is far different than them. I had 86 questions and 4 labs, you can only move forward in the test, no flagging for review, no going back to change an answer so be prepared for that. I commented on the NTP video because 3 of my 4 questions had NTP setup with peers and clients. Two had setting up SSH connections. One was all VLANS and trunking. I got none on OSPF or STP which is where I spent the majority of my practice after reading about others experiences. I also used Boson practice tests. I also had quite a few regular questions on Wireless LAN setup and SDN. SDN was actually my strongest category which was strange since in Boson tests, Security was always my strongest, in the exam it was my weakest. Either way, thanks Jeremy! These are the best video resources and I commend you for taking the time to create these and all the resources and labs and provide them for free.
Congrats on getting your CCNA! That's a major achievement, well done - I'm sure you studied a lot! And thanks so much for the generous tip; I really appreciate it :)
That's insane that you didn't get any STP or OSPF labs!!!! My first attempt, I couldn't even count how many questions I got about OSPF and IPv6, my two weakest categories back then. It appears everyone's exams can vary wildly and that you really have to be prepared for anything and everything.
ERRATA:
32:16 The 'ntp authenticate' command isn't needed to enable NTP authentication. It is only needed when using 'ntp passive', 'ntp broadcast client' or 'ntp multicast client' - all beyond the scope of the CCNA exam. Check out www.cisco.com/c/en/us/td/docs/ios-xml/ios/bsm/command/bsm-cr-book/bsm-cr-n1.html#wp2231112076 for more information.
To be fair, lots of other Cisco documentation and CCNA study materials state that this command is necessary, but that seems to be a misunderstanding. Try it out on some Cisco routers and you'll see it's not necessary!
Hello Jeremy and anyone finding this course helpful. I passed my CCNA last night and I can say that this course helped more than any other resource. For those preparing, who have taken CompTIA, this is far different than them. I had 86 questions and 4 labs, you can only move forward in the test, no flagging for review, no going back to change an answer so be prepared for that. I commented on the NTP video because 3 of my 4 questions had NTP setup with peers and clients. Two had setting up SSH connections. One was all VLANS and trunking. I got none on OSPF or STP which is where I spent the majority of my practice after reading about others experiences. I also used Boson practice tests. I also had quite a few regular questions on Wireless LAN setup and SDN. SDN was actually my strongest category which was strange since in Boson tests, Security was always my strongest, in the exam it was my weakest. Either way, thanks Jeremy! These are the best video resources and I commend you for taking the time to create these and all the resources and labs and provide them for free.
whoever's studying and has come across this video on NTP... don't sleep on it! I was super confident on my ccna exam but I skipped over NTP during my studies because I felt it wasn't a huge topic to go into... i got like 5 questions that were related to NTP and I'm pretty sure I bomb'd them all. I got a 823 because of it and just missed the exam by 2 points LOL. I'll get it next time.... !!!
lol thanks for the comment. I was thinking of skipping this video. Good luck on your next one!
That's insanely stupid, failing a ccna because you don't care about setting canadian timezones
@@sunburst8810 For real man wtf, this seems like such a trivial dumb topic that is at the same time needlessly complicated. FFS
@@DaddyDagoth I dont think we need to know about the manual configuration.. the exam topics clearly states we need to be able to configure and verify NTP operating in client and server mode.. This definitely shouldnt be a 40 min video
@@DaddyDagoth It is a very important security, performance and auditing feature. Lots of hackers attempt to screw up the timers and date/time stamps so you cannot see what was done in logs. Furthermore, having accurate and verified time stamps will increase the performance of the network. NTP is super super important. Learn thoroughly.
Being your channel members for years, I now can finally say i passes my CCNA exam last week !!!
thank you so much Jeremy for providing this complete course as I wouldn't have made it without your effort
To those who are preparing CCNA, just wanna share with you guys that the exam would contain 2-3 lab question which need you to do some hands on configuration, mine was involving in OSPF, ether channel and NTP and of course they carry huge portion of the marks so be prepare if you wanna score well : )
Welcome to Jeremy's IT Lab, today we'll learn about Jeremy's country of origin & Country of residency. Jeremy was born in Canada, but this is an old technology and nobody uses it, Jeremy moved to Japan because their network is much faster.
the mystic Jeremy Lore E X P A N D S
Even Japan still using fax machine, cash and flip cell phone.
Jeremy your course was instrumental in helping me pass my CCNA today! got a score of 895 first try!
Awesome, so glad to hear that! 895 is a great score 👍
What other study materials did you use to cover other topics? My exam in is on 20th feb and I have very limited time to cover up and do exam practice.
@@neevpatel9926 How was your exam? I hope everything went well.
@@gee40trots I passed the exam with over 900 marks
@@neevpatel9926 wow that's a huge cut congratulations 👏👏👏👏
As a long time network admin, time synchronization is critical to a healthy network across all devices! Others have thought of skipping this topic. I would suggest giving this video the time it deserves! (pun intended!).
Great video and one thing I would like to add is NTP dependency on L4 protocol and port. NTP uses UDP port 123 as both source and destination ports. It’s a fancy port number and easy to remember.
I love you, Jeremy, you are the greatest and the most helpful and generous person that I ever met, my life will change because of you !
Thank you for the great series! Passed my CCNA three days ago
Awesome! Congrats Keyshawn! From experience I know the CCNA is a tough exam to pass
What materials did you use? Please help
At this point i am just overwhelmed. I feel like the amount of information stored in my brain will flood out just like a switch floods out unknown unicast frames. So many mac addresses to remember and so many commands that are, is it just because I have not started my revision ( as i plan to finish the series first and then revise myself by using boson and revise the topics whose answer I fail to answer correctly. Ps I USE THE ANKI FLASH CARDS but at this point i think theres so much to remember and also 20 more videos info, commands, concepts.
So how did it go?
hahahhahahha like a switch flood out unicast frame, my brother that comment made me chuckle.
Kinda in the same position, but I will continue watching and labbing.. targeting it in november, come on man, were all gonna make it
I know this was a year ago, but for anyone else reading this, remember that your brain is capable of storing and automating so many more things than you would think. I used to think the exact same thing this guy did.
Think about how many different words you know, the random facts you know about a video game or tv show or something, people from decades ago you still might remember, all of that literally gets stored in your brain and we can still recall it years and years later. Your brain is not something that gets worse with use, it's actually more like a knife that gets rusted when you don't use it, and sharpened when you do. The more you use it and commit short term memory to your long term memory, the better it gets at doing it and the more you're actually able to learn and remember. Think of your brain like a hard drive that actually increases in size when you use it. This isn't even me just saying stuff to make you feel better, it's all very well studied. Trust your brain, get a bunch of reps in and go over this stuff multiple times (Do labs, flash cards, practice tests, read books/watch other videos as well if you need in addition to these, watch these ones back over, etc) and it will stick. Just takes time and practice and consistency.
@@gorilla30100 nice comment, motivated me, thx
@@Rohan-tr9gq ich can confirm @gorillas comment.
Passed it , and also had these thoughts, the more you practice, the more the dots connect together
NTP is also super important for users of the network. I bought a cheap router thinking I had got an amazing deal. It had issues syncing with the ntp server and certain services that had higher security requirements (like splashtop) were dropping packets from my network. I suspect this is to prevent replay attacks, regardless of the reason poorly configured NTP will break a lot.
Thank you so much Jeremy, your videos are always the best, may God give you the strength to keep on supporting us with your super informative resources.👏👏
Finally finished this topic as well. most difficult thing about this topic is packet tracer don't have some of the commands. So, I had to practice on Cisco CML.😀
Many thanks Jeremy. Your lectures have helped me alot to understand networking. God bless you
Thank you! Glad to hear that :)
Thank you Jeremy, your lessons are very simple and very productive, they helps me very much. I am going to pass exam after a month and it breaks my heart that i can not complete whole course :(
I hope you'll follow along even after you pass ;)
Thank you Jeremy for uploading all of your videos. I watch them all. I am confident understanding related to networking. However I'm working on Fiber Optic System. More power to you Sir!
Thanks for watching, Wilfred!
Please never give up on these
Don't worry, I won't! :)
Default stratum level of router's internal clock is 7
Thank you for video. Thank you Jeremy, from Lima Perú.
Thanks for watching :)
Waiting for your other IP services topics. Glad i found this channel
Gonna cover them all over the next few months 👍
Thanks Jeremy you have no idea how much i look forward to tuesdays
Haha glad to hear that
i think there is a typing mistake at 33:41, bottom line ntp peering configured for R2 , it should be R3. Correct me if iam wrong. :)
Ahh one more video before I go take the test! Thanks Jeremy! Wish me luck!
Good luck! What day is your exam?
Hi Jeremy. Please check your "clock summer-time" flash card. I believe it has the 'name' and 'recurring' keyword/option reversed
Hi sir/ you're all vedio is a great and all time chife and best / l like this your ,/i am a biginer ccna student
Thanks for watching :)
Thanks, Jeremy another great learning video! You and David Bombal are my inspiration to keep learning in regards to networking. I'm looking forward to your next video any hint? 😊✌
Next video will be the lab for this video, so NTP again!
Simply amazing. Thank you Jeremy!
Thanks, Piotr :)
37:04 i thought it was D since in the video when u didnt specify it was 7 and would show 8 in ntp status. so i thought if we specify 8 then it would show 8 here and 9 in status..
For your final example : why it is not D ?
ntp server {address | hostname}: NTP client/server mode-the device acts as both client
and server. First, it acts as an NTP client, to synchronize time with a server. Once synchronized,
the device can then act as an NTP server, to supply time to other NTP clients.
Are you asking about the Boson example? 'NTP SERVER x.x.x.x' configures the device to synchronize its time to the server specified in the command. This is static client mode.
After synchronizing to that server it CAN be a server for other NTP clients, but in this case A is definitely the more correct answer.
@@JeremysITLab Thank you for the explanation
Hello Jeremy , great video channel , thank you Jeremy for all your efforts to deliver such great content !
Thanks Samir :)
Awesome series! Thanks Jeremy!
@JeremysITLab I'm confused on the quiz 3 , normally the answer should be D because the default stratum is 7 when we configure the ntp master
@12:43 in the last should "name" & "recurring" be swapped 🤔
You're early this week ! thank you my man !
Only a couple hours ;)
I think the
clock summer-time recurring name start end [offset] at 12:48 should be
clock summer-time name recurring start end [offset]
thank you so much.i learned lot of facts from this video
Thanks for the video Jeremy! Really appreciate it
Thanks for watching :)
How is one suppose to memorize the overall Cisco commands for this 200-301???? The way the exam has been re-structure makes me think they trying to hinder people (mainly ones without any experience) from being successful on the exams. Good think we have Jeremy to guide us through.
The previous version actually required more knowledge of configurations/commands! This new version adds more theoretical stuff (although you do of course still need to know lots of configurations!)
Hi Jeremy, I would like to ask something, when we use ntp master command, the router will sync to its internal clock, the "internal" in this scenario means software clock or hardware calendar? thanks in advance
It'll sync to the software clock in this case
@@JeremysITLab thanks
please tell us the resources from which u prepare those lectures,
any References or books
thanks in advance
I already know the topics, so I mostly use documentation from the IEEE/IETF + Cisco documentation to make sure the details are correct.
For the clock summer-time command does the name go before or after 'recurring'? You mentioned both at 12:36 and then in the listed commands at 12:45
@33:10 it should be R3 in the last line, shouldn't? 🤔
thanks Jeremy for the high value lecture.
Thank you Jeremy, will you cover CCNP course after this?
Probably, but I'm not 100% decided
Great video. Is it possible to set up NTP in fortigate firewall pointing out to data center controller?
As always great stuff!! thank you!!
I think part of it a little bit out of scope but it's really hard to know.
Which parts?
I agree, it's hard to determine from '4.2 Configure and verify NTP operating in a client and server mode' exactly what is included.
Thank you Jeremy. You're great as usual. I am starting to be worried about CCNA the amount of information to know is huge, and I am not being dramatic!
The default stratum of ntp master is 7 or 8, this is something that I didn't understood. I've google It and I more confused I found this : "Default stratum level of router’s internal clock is 7"
When you use the 'ntp master' command, the router's NTP stratum level will be 8. It is syncing to itself (its internal clock), so in that case you can say the internal clock's stratum is 7.
Thank you Jeremy Sir 🙏 Instead of using 127.127.1.1 address for master clock. Can we specify any other loopback address to use as it's NTP master clock.
Your answer is at 37:05 ;)
@@JeremysITLab Thank you sir🙏
Thank you Jeremy for all those videos
In the Anki Flashcards for this episode, there is a question about how to configure daylight saving time, and the answer says that start and end requires "day, weekday, month and time", but I believe it should be "week (first, last, number), weekday, month and time". Can you please check? Wouldn't like to mess that up on the exam... ;-)
You're right, fixed it! Thanks :)
At 12:42, shouldn't it be R1(config)# clock summer-time name recurring start end [offset]
instead of
R1(config)# clock summer-time recurring name start end [offset]
?
Thanks for the video and hardwork!!! Quick question. After tackling the ccna, what would you recommend next? I see videos where the devnet cert should be knocked out next, while others consider going straight for the ccnp, or even cloud certs.
CCNP, in my opinion. Depends on what kind of job you want, though.
For the NTP key-number does it have to match on both client and server? Obviously, the key itself has to be the same but can the numbers be different per machine?
Yeah I'm pretty sure they have to match too...try it out in packet tracer!
@@JeremysITLab yup they have to match on both client and server, thanks for making me try myself
greetings jermey, keep up the great work
Thank you! :)
Many thanks for the videos.
how many additional videos do you plan to make ?
i finished one different course which also helped much. I thought i can finish your videos earlier but it seems that you continue to help people in an understandable way and will not finish in short term.. Keep going..:) .
I also recommend every lecturers to use touchscreen PC or a tablet to take not on the videos capturing screen. Upon saving pictures, it is easy to repeat . With doing so, i finished my 100+ videos in 15 days when repeating.. i also started your videos with same tactic. I recommend Epic Pen application to note on the screen...You also need a good smart pen to use on the PC screen. Good luck to all learners...
The course is about 70% complete
Hi, is this serie still relevant now for the CCNA and is this enough to pass the exam ? Thanks
more information as i expected
Thank you for the Video lessons.
Thank you so much Jeremy ...
Thanks for watching :)
Dear how many video still left to complete CCNA course and what is the second play list of practical are all same for the new CCNA course.
The course is about 70% complete. The second playlist was made for the previous version of the CCNA exam, but most of the videos are still relevant.
@@JeremysITLab thank u for providing information sir.
Thanks Jeremy.
Thanks, Stephen :)
On a Cisco WS-C3850-24P i don't have the "show calendar" option. Why is that?
#Configuration *Global Configuration*
*ntp server* _ip-address_ _[prefer]_ : Configures a Cisco device to synchronize its clock with a specific Network Time Protocol (NTP) server. The "ip-address" parameter is the IP address of the NTP server. The optional "prefer" keyword is used to indicate that this NTP server should be the primary source of time for the device.
*ntp peer* _ip-address_ : Configures a Cisco device to synchronize its clock with a specific NTP peer. The "ip-address" parameter is the IP address of the NTP peer.
*ntp update-calendar* : Updates the device's calendar with the current time obtained from the NTP server or peer.
*ntp master* _[stratum]_ : Configures a Cisco device as an NTP master. The optional "stratum" parameter is used to specify the stratum level of the device. The lower the stratum level, the more accurate the time source.
*ntp source* _interface_ : Specifies the interface from which the device should obtain its time source.
#Show *Privileged EXEC*
*show ntp associations* : Displays information about the NTP associations on a Cisco device. This includes the status of the associations, the IP address of the server or peer, and the stratum level.
*show ntp status* : Displays the current status of the NTP service on a Cisco device. This includes the current time, the time source, and the stratum level.
#Authentication *Global Configuration*
*ntp authenticate* : Enables NTP authentication on a Cisco device.
*ntp authentication-key* _key-number_ *md5* _key_ : Configures an NTP authentication key on a Cisco device. The "key-number" parameter is the number assigned to the key, "md5" specifies the type of key (MD5) and "key" is the key value.
*ntp trusted-key* _key-number_ : Specifies the NTP authentication key that the device should use.
*ntp server* _ip-address_ *key* _key-number_ : Configures a Cisco device to synchronize its clock with a specific NTP server and specify the key for authentication.
*ntp peer* _ip-address_ *key* _key-number_ : Configures a Cisco device to synchronize its clock with a specific NTP peer and specify the key for authentication.
#Clock *Global Configuration*
*clock summer-time* _zone_ { _date month year hh:mm date month year hh:mm_ | *recurring* _week day month hh:mm week day month hh:mm_ } _[offset]_ : Configure system to switch to automatically daylight saving time. Offset is the number of minutes to add during the summer time. Enter dates in ascending order.
*clock timezone* _zone hours-offset [minutes-offset]_ : To set the time zone for display.
Ty jfoe your hard work. I really love your course...
Thank you :)
Sir please make a video on how to configure a router from first
I explain how to configure routers in other videos
u used bosom and CCNA Gold Bootcamp: for the ccna ? whats at this time the best choice ?
Hello Jeremy,
I have question,
What is NTP Mode 6 Vulnerability and how can we solve it?
Hello there!! I was wondering when this course would be completed or how many days are there in total? thanks
The course is about 70% complete. It will be finished this year.
You live in Japan? Wow !! Hello neighbor! Must be a trip working as a network engineer here.
Thank you Jeremy :-)
Thanks for watching :)
Thanks Jeremy!
I tried it on packet tracer , on a 2900 switch, and the same command on a router but doesn't give on the switch
Hello Jeremy, I would like to ask something about NTP. How can Routers, which are layer 3 devices, can communicate to a layer 7 level protocols? I am a bit confused about this. Maybe i misssed something.
Your course is great. It is the reason i started learning networking. Thanks
I think im kind of retarded but I'll give this question a crack lmfao. Routers just forward packets to the destination it needs to reach via a next hop address if it has. I don't think it cares about communicating with anyhting beyond its layer as layer 7 is purely created by hosts that need whatever is going on over their lol. The routers job is just to make sure stuff is getting where it needs to be.
Thank you for this video!
Thanks Miguel :)
In the diagram at 17:05 the CISCO NTP servers are at Stratum 2 or they can connect directly to the Straum 0?
A Cisco IOS device (router, switch) can't sync directly to a stratum 0 device (an atomic clock). The best they can sync to is a stratum 1 server, so the IOS device will be stratum 2.
@@JeremysITLab thank you very much
How many videos do you plan this Course to have ? How complete is it now ? Also, thank you so much for making the effort of publishing this amount of knowledge for free!
The course is about 70% complete. It'll be finished this year, but I'm not sure exactly when.
as always a great lesson, plenty of thanks
Thank you :)
Hi jeremy i am asking can we get the slides that you explain from it will be very helpful
I didn't really understand Quiz 3: Why did we select 9 instead of 8?
Thanks a lot, God bless you!
Thanks for watching :)
is ntp concept important for firewall or network security engineer...?
Yes! All devices should have accurate time and NTP can be a vulnerability, so security engineers should know it well.
It seems Packet Tracer does not allow for the configuration of Day Light Savings, nor does it allow for the clock update-calendar and clcok read-calendar commands
thanks Jeremy ,,KE
Thanks for watching :)
How many days do you plan this series to have when complete?
Not 100% sure, but probably around 55.
Is there a downside to having several ntp servers specified? An example - we have switches configured as ntp servers syncing to an external server. But sometimes these are not configured correctly or have other issues. In some configurations of our networks t different locations, there may not be a ntp server switch, so the devices on the LAN sync directly to the external sources. It has been a source of confusion for people with inconsistent ntp server settings, so I'm wondering if it isn't the easiest to simply configure our standard switch IPs as wel as the external server IPS (so we'd have 4 ntp servers instead of 2) for every device and if they automatically pick the best one, I should be set right? Is there a downside to this configuration?
Nah, you're literally setting yourself up with redundancy to multiple NTP servers incase shit hits the fan lol.
Thank you Jeremy Sir 🙏 I want to set the Time Zone of IST ( India Standard Time ) . Offset between UTC and IST is +5.30 ahead. So what should be the correct command.
The command is 'clock timezone (name) (hours-offset) (minutes-offset)' So, the name is IST. Then the hours (5) and minutes (30).
@@JeremysITLab Okk Sir Thank you 🙏
I live in a country that has daylight savings, and I have no idea when it begins and ends exactly because every clock in my home does it on its own. I had to look it up lol
WHERE CAN I GET THE FLASH CARDS FOR THIS TOPIC
Thanks
Thanks for everything, I wanted to ask you what do you think how long will it take until you cover all fields? thanks again .
The course is about 70% complete
@@JeremysITLab thank you for your Reply much appreciated Sir.
Brilliant.
Thanks so much!
Thanks for watching :)
Thanks for the video
Thanks for all your comments :)
13:05 NTP starts
Hi Jeremy!
When you enter #ntp master Command without stratum number didn’t you say a default stratum number will be 7 ?
What time in the video are you asking about?
@@JeremysITLab si watched the video again and I misunderstood, sorry..
thank you Jeremy !
Hello Jeremy and anyone finding this course helpful. I passed my CCNA last night and I can say that this course helped more than any other resource. For those preparing, who have taken CompTIA, this is far different than them. I had 86 questions and 4 labs, you can only move forward in the test, no flagging for review, no going back to change an answer so be prepared for that. I commented on the NTP video because 3 of my 4 questions had NTP setup with peers and clients. Two had setting up SSH connections. One was all VLANS and trunking. I got none on OSPF or STP which is where I spent the majority of my practice after reading about others experiences. I also used Boson practice tests. I also had quite a few regular questions on Wireless LAN setup and SDN. SDN was actually my strongest category which was strange since in Boson tests, Security was always my strongest, in the exam it was my weakest. Either way, thanks Jeremy! These are the best video resources and I commend you for taking the time to create these and all the resources and labs and provide them for free.
Congrats on getting your CCNA! That's a major achievement, well done - I'm sure you studied a lot! And thanks so much for the generous tip; I really appreciate it :)
Congrats
Congratulations. Thanks a lot for information. it is interesting that you got none of OSPF or STP labs.
That's insane that you didn't get any STP or OSPF labs!!!! My first attempt, I couldn't even count how many questions I got about OSPF and IPv6, my two weakest categories back then. It appears everyone's exams can vary wildly and that you really have to be prepared for anything and everything.
Can I get written notes of ccna
Sorry I don't provide notes. I recommend taking notes as you study.
@@JeremysITLab can you please recommend some books
Brother. If you feel comfortable can you tell me why you're living in Japan. While Canada is good country. Please please please I want to know.
leaving comment for utoob algorythm
Much appreciated ;)