We can simply do a btech degree just with your videos...and its unnecessary to attend college... totally loved your videos ... watching it from operating system...thx a ton...💓
In this lecture sir told that In TCP Connection all packets follow the same path but it's not correct. What if that path is damaged or down for while in between the transmission. That's why packets can be follow multiple paths but it is guaranteed that all packets reach to destination. I read that on an article. But overall lecture is awesome!! . I put this comment here so that those who have same doubt like me can resolve it.
00:01 UDP is a connectionless protocol that works like a postal service. 01:27 UDP is a protocol that allows data to be sent without establishing a connection. 02:57 UDP header has only 4 options, one of which is the Source Port. 04:25 UDP header in Computer Networks 05:52 The UDP header in Computer Networks has a fixed size of 8 bytes. 07:22 UDP header with 8 bytes is compulsory for sending data 08:46 UDP header in Computer Networks 10:23 UDP is unreliable and packets may get lost or reach through different paths
Tomorrow is our final exam.... Until now we had no idea what we have studied in this smester, Zero per concept about CCn, after listening to you, literally you made it so easy for us, thanks a bunch, now this subject seems quite interesting. ❤️
00:01 UDP is a connectionless protocol that works like a postal service. 01:27 UDP is a protocol that allows data to be sent without establishing a connection. 02:57 UDP header has only 4 options, one of which is the Source Port. 04:25 UDP header in Computer Networks 05:52 The UDP header in Computer Networks has a fixed size of 8 bytes. 07:22 UDP header with 8 bytes is compulsory for sending data 08:46 UDP header in Computer Networks 10:23 UDP is unreliable and packets may get lost or reach through different paths Crafted by Merlin AI.
Sir bahhtttt achaa padate hai aaap bilkul esa lgta hai jaise kisi class m bethe ho thankuu sir..... Sir aap plz DAA sub k topics pr bhi bnye vedio..... I think aapke lecture se vo subject bilkul easy ho jayega.... Plz rply.... M waiting
it was nice explanation. Thanks for the video. but i have one doubt is that if congestion detection happen after threshold value or in congestion avoidance phase so what will be the threshold value?
While calculating Checksum, why do we include Pseudo IP Header given that UDP is Transport Layer protocol and IP header will actually be appended when the packet reached the network layer. If this is supposed to be a part of the network layer, then why don't we add source and destination IP addresses?
Checksums are used in networking to detect errors in data transmission. In the case of UDP (User Datagram Protocol), a checksum is calculated over the UDP header, the data payload, and what's known as a pseudo IP header. The inclusion of the pseudo IP header serves a specific purpose in ensuring data integrity and is a part of the design of UDP. The pseudo IP header is not part of the actual IP header that gets added when the packet is transmitted over the network; it is used during the calculation of the UDP checksum at the transport layer before the packet is sent. The purpose of the pseudo IP header is to provide additional information that helps in verifying that the UDP packet was received correctly by the intended recipient, without relying on the actual IP header, which may not yet be available at the transport layer when the checksum is calculated. The pseudo IP header typically includes the following fields: 1. Source IP Address: The source IP address of the sender. 2. Destination IP Address: The destination IP address of the receiver. 3. Reserved (Set to 0): A reserved field set to zero. 4. Protocol (UDP): The protocol number for UDP (17). 5. UDP Length: The length of the UDP packet, including the UDP header and data payload. Including the source and destination IP addresses in the pseudo header helps in distinguishing packets intended for different destinations and detecting errors in the UDP packet's transmission. It also provides a layer of consistency in the checksum calculation, allowing the recipient to verify the integrity of the packet and discard it if errors are detected. In summary, the pseudo IP header is a part of the UDP checksum calculation process at the transport layer, and it includes source and destination IP addresses to aid in error detection and ensure data integrity. It is not the same as the actual IP header that gets added at the network layer during transmission.
sir at 7:03 in this video we are subtracting 8 byte which is header size of UDP protocol directly from the number 65535 so that we can get the size of payload/data but sir how can we directly subtract the bytes from bit number??
Connectionless transfer is faster because no time is wasted in establishing connection first, by sending synchronization and acknowledge packages first. It is used for small data or message transfers which are not sending sensitive information
Very nice teaching. Understood many concepts with your video. But got one doubt here. UDP should fit inside IP packet right? If UDP itself has a total length of 65535, how it will fit into ip packet for which also the max size is 65535. So the total size of UDP should be 65535 - 20 (ip header). Am I correct?
You are correct in your understanding that the maximum size of a UDP packet, when encapsulated within an IP packet, is limited by the Maximum Transmission Unit (MTU) of the network. However, there seems to be some confusion in your calculation. The maximum size of an IP packet (including both the IP header and payload) is determined by the Maximum Transmission Unit (MTU) of the network over which it is transmitted. The typical maximum MTU for Ethernet networks is 1500 bytes. This means that the maximum size of the IP packet, including both the IP header and the encapsulated transport-layer protocol (UDP in this case), is 1500 bytes. The IP header itself is typically 20 bytes in length for IPv4, but it can be longer if there are IP options included. So, when you want to encapsulate UDP within an IP packet, you need to consider the following: 1. IP Header Size: Usually 20 bytes for IPv4. 2. UDP Header Size: 8 bytes for a standard UDP header. 3. Data Payload Size: This is the size of the data you want to send. The total size of the UDP packet, including the IP header, UDP header, and data payload, should not exceed the MTU of the network. In most cases, this is 1500 bytes for Ethernet. Here's the correct calculation: Maximum UDP Packet Size = MTU - IP Header Size Maximum UDP Packet Size = 1500 bytes (MTU for Ethernet) - 20 bytes (IPv4 header) = 1480 bytes So, the maximum size of a UDP packet encapsulated within an IPv4 packet for an Ethernet network is typically 1480 bytes. This accounts for both the IP header and the UDP header, leaving room for the data payload. If the UDP packet exceeds this size, it may need to be fragmented or handled in some other way, depending on the network configuration and the devices involved in the transmission.
Sir, you said unique hash value will be shared along with the data and it will be verified at the receiver end, but what if that unique hash value gets hampered during the data transfer?
I m here about to write online exam in lockdown of pre final yr from engineering.... U r just LIT 🔥 n thank you
Ok
bruh
Tomorrow is my offline exam and I am reading it today 💥
@@ravindrasinghdodiya9506 same here
You are lucky You have opportunity to do engineering during lockdown.
Your efforts will enlighten lacs of students. Tussi great ho sirji.
We can simply do a btech degree just with your videos...and its unnecessary to attend college... totally loved your videos ... watching it from operating system...thx a ton...💓
You need to watch OS
In this lecture sir told that In TCP Connection all packets follow the same path but it's not correct. What if that path is damaged or down for while in between the transmission. That's why packets can be follow multiple paths but it is guaranteed that all packets reach to destination. I read that on an article. But overall lecture is awesome!! . I put this comment here so that those who have same doubt like me can resolve it.
These playlists will continue to rock for years. Thank you for all the efforts.
You made me understand the real meaning of being an IT Engineer ❣️
you are amazing sir , i hope college teachers will be like this.
Confidence, knowledge, way of teaching, just loved it. Love from Paksitan. You just made this subject so easy to learn.
Pakistan me bhi padhate he?(just joking)
Today's the D-DAY for ACN exam and I'm just here preparing. You're the best! 🔥
Length of payload will be 65535-64= 65471
Gate Smashers - Your Achievement is our Passion 🧡
your achievement is our passion.. on the shirt ❤❤
00:01 UDP is a connectionless protocol that works like a postal service.
01:27 UDP is a protocol that allows data to be sent without establishing a connection.
02:57 UDP header has only 4 options, one of which is the Source Port.
04:25 UDP header in Computer Networks
05:52 The UDP header in Computer Networks has a fixed size of 8 bytes.
07:22 UDP header with 8 bytes is compulsory for sending data
08:46 UDP header in Computer Networks
10:23 UDP is unreliable and packets may get lost or reach through different paths
The way of explanation is very good sir..
Bhut hi aasani se smjh gya me.
Thank you so much
Sir your videos are easy to remember and understanding..i request you to make videos on ip header and dhcp header.. it's really helpful for us.
Your all videos are very helpful I have done all the preperation of my CN exam by your channel . Your way of explaning is just awesome 👏
Bro You are Genius.... I love the way of Teaching.........❤️
Tomorrow is our final exam.... Until now we had no idea what we have studied in this smester, Zero per concept about CCn, after listening to you, literally you made it so easy for us, thanks a bunch, now this subject seems quite interesting. ❤️
why not learn from your pakistani guys
@@ujjwalnegi2648why not use Google which made in india ? Why are u even watching yt use something made in indis
00:01 UDP is a connectionless protocol that works like a postal service.
01:27 UDP is a protocol that allows data to be sent without establishing a connection.
02:57 UDP header has only 4 options, one of which is the Source Port.
04:25 UDP header in Computer Networks
05:52 The UDP header in Computer Networks has a fixed size of 8 bytes.
07:22 UDP header with 8 bytes is compulsory for sending data
08:46 UDP header in Computer Networks
10:23 UDP is unreliable and packets may get lost or reach through different paths
Crafted by Merlin AI.
sir , you are really a superb teacher.
Sir g thank you sooooooooo muchhhhhhhh......🥰🥰🥰🥰♥️ T-shirt is so nyc 😍🥰 sir apka koi b lecture ik dfa smj ln 💯 smj ajati... Thanks again 🥰
Very nice explanation sir.... Solve some gate problems asked previously on this tcp and udp topic...
Thank you sir... For all videos... Your a best 👍 I'm pass out a engineering
Really u r genius sir ji.. watched all ur videos.. plz make some videos on SOCKET PROGRAMMING Concept
In IPV6 check sum is not present...(according to wikipedia)....But in IPV4 check sum is there... Pls clear it..
You are a superb teacher.. 😍😍
Your just flawless in teaching ... Expecting more knowledgeable videos - Subscribed :)
i request you to make more videos sir
Thanks a lot sir your effort means a lot and has eased us :D
Sir bahhtttt achaa padate hai aaap bilkul esa lgta hai jaise kisi class m bethe ho thankuu sir.....
Sir aap plz DAA sub k topics pr bhi bnye vedio..... I think aapke lecture se vo subject bilkul easy ho jayega.... Plz rply.... M waiting
Thank you so much sir for explaining all the topics in such a great manner🥰😌
thnkss alott ji....sir...Gid bless u forever...
Thank you sir ❣️
You teach awesome sir 🙏
it was nice explanation. Thanks for the video. but i have one doubt is that if congestion detection happen after threshold value or in congestion avoidance phase so what will be the threshold value?
Wah....😎😎
Sir , Very easy to understand anything
varun sir sandeep maheswari sir ke show pee kaab jaarahe hoo ? plzz sir we want to see you there and thank you for all.
Nice explanation 👍
fabulous nice teaching
Just one word for you "awesome"
Thanks sir ,love from Bangladesh.
Amazing explanation!!. Really loved your videos :-)
Sir awesome explanation. plz make more vedio in toc
While calculating Checksum, why do we include Pseudo IP Header given that UDP is Transport Layer protocol and IP header will actually be appended when the packet reached the network layer. If this is supposed to be a part of the network layer, then why don't we add source and destination IP addresses?
Checksums are used in networking to detect errors in data transmission. In the case of UDP (User Datagram Protocol), a checksum is calculated over the UDP header, the data payload, and what's known as a pseudo IP header. The inclusion of the pseudo IP header serves a specific purpose in ensuring data integrity and is a part of the design of UDP.
The pseudo IP header is not part of the actual IP header that gets added when the packet is transmitted over the network; it is used during the calculation of the UDP checksum at the transport layer before the packet is sent. The purpose of the pseudo IP header is to provide additional information that helps in verifying that the UDP packet was received correctly by the intended recipient, without relying on the actual IP header, which may not yet be available at the transport layer when the checksum is calculated.
The pseudo IP header typically includes the following fields:
1. Source IP Address: The source IP address of the sender.
2. Destination IP Address: The destination IP address of the receiver.
3. Reserved (Set to 0): A reserved field set to zero.
4. Protocol (UDP): The protocol number for UDP (17).
5. UDP Length: The length of the UDP packet, including the UDP header and data payload.
Including the source and destination IP addresses in the pseudo header helps in distinguishing packets intended for different destinations and detecting errors in the UDP packet's transmission. It also provides a layer of consistency in the checksum calculation, allowing the recipient to verify the integrity of the packet and discard it if errors are detected.
In summary, the pseudo IP header is a part of the UDP checksum calculation process at the transport layer, and it includes source and destination IP addresses to aid in error detection and ensure data integrity. It is not the same as the actual IP header that gets added at the network layer during transmission.
You are awesome, nature bless you !
Really great explanation and quality of content is great ❤️
Good explanation!
I easily understand.
sir at 7:03 in this video we are subtracting 8 byte which is header size of UDP protocol directly from the number 65535 so that we can get the size of payload/data but sir how can we directly subtract the bytes from bit number??
Exactly my doubt! Need to convert either of them
Sir u r really great 🔥 very helpful for every subject
Ip header is added after the tcp header. Then how is pseudo header is calculated then ?
Nice working, Nice effort keep it up :)
nice udp header lecture
you are a great teacher..love from Pakistan.
Sir yours videos are superb 🙂😊
nice video
checksum isliye use hota ha k agr kahin rasty ma hamara packet corrupt ho jaye to destination ko pta lg sky k data corrupt ha ya normal.
really nice Sir. Thanks :)
Ps: nice t-shirt :P
Thank You for your love and support. Bless you
Sir udp header length is 8 bits or 8 bytes because 65535 are in bits not bytes
Thank you so much
I think his 2x speed is much active and better explanation than normal speed 🤓
If checksum field is optional then how header size can be 8 bytes which is mandatory.
Same problem anyone help
👍👌
Gajab
good video sir...
If UDP is not handling error then what is use of Checksum in it?
One question regarding UDP:
Why we have to add destination IP address in UDP when it can simply broadcast the message as per its nature?
it is up to you. you can sent it to host or network as a destination. but it is careless.
nice
If the header length is 16 bits then the max. length can be 2 to the power 16 bits then how is length 2 to the power 16 bytes?
yess i too have same doubt. The length is 16bits but number of values which can fit in 16 bits space is 2^16. Dont you think so?
@@swethachilveri4123 The maximum length will be 16 times 1 that is 1111111111111111 which makes it 65535.....that's what I interpreted
Thanks sir. Plz net k liye aur videos banaiye. Plz cover whole syllabus
What is the Fanda of connectionless :D
Great tutorial btw.
Connectionless transfer is faster because no time is wasted in establishing connection first, by sending synchronization and acknowledge packages first. It is used for small data or message transfers which are not sending sensitive information
Super Sir
best video bro
Well explaination sir.
awesome
Super sir.. Pls make more video
Best lecture
thank you very much sir
So nice of you
Amazing
Please upload video on multiplexing in TCP and UDP
1000th like!! very well explained! thanks a lot sir!
Thank you
You are the God of Computer Networks
Thank you sir
Well explained
sir , can you upload the notes of computer network and share that link...please it will help us to remember this.
very helpful
Sir iski next video bana chuke ho Kya.
Sir can plzz upload more videos on comp.network
Can we call it a wireless connection?
good sir g....sir g pls ,,,,, GSM and CDMA; Services and Architecture of GSM ispe video bnaye pls its my request
I am following your channel for my ugc net cs 2020 and gate cs 2020 , but i am unable to solve problems.
How can i utilize much from your videos?
TBH i learned hindi from this channel rather content
Thankyou
Thanks sir g 👍
yaayyyyyyyyyyy 500K
But i read on gfg that tcp mein packets different paths see travel kar sakte hain 🤔🤔
Very nice teaching. Understood many concepts with your video. But got one doubt here. UDP should fit inside IP packet right? If UDP itself has a total length of 65535, how it will fit into ip packet for which also the max size is 65535. So the total size of UDP should be 65535 - 20 (ip header). Am I correct?
had the same doubt.
You are correct in your understanding that the maximum size of a UDP packet, when encapsulated within an IP packet, is limited by the Maximum Transmission Unit (MTU) of the network. However, there seems to be some confusion in your calculation.
The maximum size of an IP packet (including both the IP header and payload) is determined by the Maximum Transmission Unit (MTU) of the network over which it is transmitted. The typical maximum MTU for Ethernet networks is 1500 bytes. This means that the maximum size of the IP packet, including both the IP header and the encapsulated transport-layer protocol (UDP in this case), is 1500 bytes.
The IP header itself is typically 20 bytes in length for IPv4, but it can be longer if there are IP options included.
So, when you want to encapsulate UDP within an IP packet, you need to consider the following:
1. IP Header Size: Usually 20 bytes for IPv4.
2. UDP Header Size: 8 bytes for a standard UDP header.
3. Data Payload Size: This is the size of the data you want to send.
The total size of the UDP packet, including the IP header, UDP header, and data payload, should not exceed the MTU of the network. In most cases, this is 1500 bytes for Ethernet.
Here's the correct calculation:
Maximum UDP Packet Size = MTU - IP Header Size
Maximum UDP Packet Size = 1500 bytes (MTU for Ethernet) - 20 bytes (IPv4 header) = 1480 bytes
So, the maximum size of a UDP packet encapsulated within an IPv4 packet for an Ethernet network is typically 1480 bytes. This accounts for both the IP header and the UDP header, leaving room for the data payload. If the UDP packet exceeds this size, it may need to be fragmented or handled in some other way, depending on the network configuration and the devices involved in the transmission.
❤❤❤❤❤
Even in tcp, packet can take different paths.
confusing bit and bytes substraction sir pls clear how can we subtract 8 bytes of header from total lenght ??
Sir, you said unique hash value will be shared along with the data and it will be verified at the receiver end, but what if that unique hash value gets hampered during the data transfer?