Transport Layer l

Question 1

Transport layer

Answer 1

Responsible for ensuring that data packets arrive accurately

Question 2

How does the transport layer work?

Answer 2

Splits up data into smaller units and passes onto network layer

Question 3

What’s the relationship between the transport and network layer?

Answer 3

Transport Layer: provides logical communication between processes
Network Layer: provides logical communication between hosts

Question 4

Process-Level Addressing

Answer 4

Helps a device know which app/process the incoming data is for

Question 5

How process-level addressing works

Answer 5

Network layer identifies host and transport layer assigns a port number to each process

Question 6

Multiplexing (Sender Side)

Answer 6

Allows data from multiple processes to be combined and sent over a single transport layer

Question 7

Demultiplexing (Receiver Side)

Answer 7

Transport layer looks at port numbers and directs each portion of data to correct application

Question 8

Integrity Checking

Answer 8

Ensures that the data received is accurate and hasn’t been corrupted during transmission

Question 9

How does integrity checking work?

Answer 9

Transport layer checks if the data arrived correctly. If something’s wrong, it asks to send it again

Question 10

Connection Management (Establishment and Termination)

Answer 10

Sets up a connection before sending data and closes it when done

Question 11

How does connection management work?

Answer 11

Both sides agree to connect before talking and then agree to disconnect when finished

Question 12

Acknowledgments and Retransmissions

Answer 12

Acknowledges received data and retransmits missing/corrupted data

Question 13

How Acknowledgments and Retransmissions work

Answer 13

Receiver sends an ACK to confirm it got the message. If no ACK comes, the sender sends it again

Question 14

Flow Control

Answer 14

Manages the rate of data transmission to prevent overwhelming the receiver