TCP

Question 1

How does TCP establish a connection?

Answer 1

3 way handshake.
SYN: Client sends SYN to start connection
SYN-ACK: Server responds with SYN-ACK
ACK: Client sends ACK

Question 2

What is the purpose of flow control?

Answer 2

Prevents sender from overwhelming the receiver by limiting unacknowledged data using sliding window protocol.

Question 3

How does sliding window work?

Answer 3

Sender can only send up to advertised window bytes without ACKs.
Receiver can adjust window size based on available buffer space.

Question 4

What are cumulative acknowledgements in TCP?

Answer 4

Each ACK confirms receipt of all previous bytes up to a sequence number.

Question 5

How does TCP handle retransmitting and retransmitting?

Answer 5

Uses timeouts and automatic repeat requests