3.1 Introduction and Transport-layer Services

Video presentation: Transport layer: Chapter goals. Transport-layer services and protocols. Transport layer actions.
Computer networks class.
Jim Kurose
Textbook reading: Section 3.1, Computer Networking: a Top-Down Approach (8th edition), J.F. Kurose, K.W. Ross, Pearson, 2020.
See gaia.cs.umass.edu/kurose_ross for more open student resources.

[@karankap00r]

The analogies in this series are so good! These explain the concepts with so much clarity!! Thanks for making these public.

[@karanpreetsingh5966]

From the day you walked into my life, you're all I think. You are the reason I breathe. You are the stars in my sky.

[@garvitjain1623]

From the day karanpreetsingh walked into my life, you're all I think. You are the reason I breathe. You are the stars in my sky.

[@cenkerenozbek]

"To W.W. My Star, My Perfect Silence."

[@isurangasenavirathne7218]

@@cenkerenozbek W.W.. wonder what it might mean? Wudrow Wilson?

[@asjadsalahuddin5918]

Professor Kurose, Looking forward to watch all the lectures .

[@TheJynx2011]

Thank you for the lectures Professor! Amazing videos.

[@ikbenlhmnn8421]

Easily understand to grasp this knowledge! Thanks, Prof!

[@caetanomf]

I'm looking forward to buy the 8th edition of your book.

[@satyajeetpatil8177]

You're a legend Dr Kurose

[@byte_easel]

a great analogy indeed. definitely cleared up what the transport vs network does. network layer is to get from point A to point B, transport is figuring out who in point B to deliver to... which is why transport has port numbers, and network has IP addresses. amazing lol

[@bayan445]

thank u so much for helping me understand this chapter so well!! I was struggling with the network course and may take another one!!🥰

[@onurcanisler]

Thank you professor:DDD

[@priyeshtandel2101]

Thank you Sir , It is very useful for me.😇

[@ztothey2dah]

Thank you for the video presentations Professor! My answer to the end-of-session question is that "complexities on the edge", it's not a necessity for all applications to provide delay/bandwidth guarantee, so we might leave these issues to the application layer to handle, as we've seen in the example of video streaming services.

[@shishankrawat2105]

I strongly agree...

[@TheMetaSetter]

🎯 Key Takeaways for quick navigation:
00:00 📡 *The transport layer is a crucial component of internet architecture, addressing challenges like reliable communication over potentially corrupt channels.*
01:27 🔄 *Study of transport layer involves principles such as multiplexing, demultiplexing, reliable data transfer, flow control, and congestion control.*
02:50 🏠 *Logical communication between application processes on different hosts is a key focus, despite the physical distance and potential issues in the network.*
04:55 📨 *Analogy: Internet hosts are like houses, processes are like kids, application messages are like sealed letters, and the network layer is the Postal Service.*
06:30 🚚 *Transport layer actions include creating segments, determining header fields, passing segments to the network layer, receiving segments, checking headers, extracting messages, and demultiplexing.*
06:42 🔄 *TCP (Transmission Control Protocol) provides reliable, ordered delivery with congestion and flow control, requiring connection setup at sender and receiver.*
07:23 🔄 *UDP (User Datagram Protocol) is a best-effort, no-frills protocol with unreliable delivery and the absence of services like guaranteed delivery time or bandwidth.*
Made with HARPA AI

[@jeevan288]

GOOD

[@devmahad]

Basic concepts of transport layer and it's purpose :)

[@user-il9em7uu6m]

which slide you use to teach us then from where we download

[@caetanomf]

Professor Kurose, it was a very good discussion! How can we get access to all videos of the course?

[@kapil_ag__]

gaia.cs.umass.edu/kurose_ross/online_lectures.htm

[@prabhus5831]

What is the processes here?

[@marialeth7252]

is a router a kiddo in the house?

[@klevisimeri607]

🧠