Question

Congestion Window Size versus Transmission Rounds 140 120 100 80 Congestion Window Size (in segments) 60 40 2. 20 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 Transmission Round

TCP Connection Setup consists of a "three-way handshake:" SYN, SYN-ACK, ACK.

Which one(s) of these three segments specifies an initial sequence number?

Which one(s) of these three segments is permitted to contain application data?

Answer 1

Which one(s) of these three segments specifices an initial sequence number?

Answer:

SYN, SYN-ACK

Explanation:

TCP connection setup starts with a three-way handshake in which client and server exchange few packets beforehand so that they are on the same page of the protocol.

Now, firstly client sends a SYN packet which means Synchronize sequence number, it informs server that client is likely to start connection and also informs about the initial sequence number of the segment that client would like to start with.

Secondly, server sends a SYN-ACK packet to the client, A SYN packet to advertise server's intial sequence number of segments and to let the client know that server is also interested in establisihing connection. And ACK packet which means acknowledgement to inform the client that server has recieved SYN packet that client had sent.

Which one(s) of these three segements is permitted to contain application data?

Answer:

ACK

Explanation:

This is the final step in completion of a three-way handshake during TCP connection establishment. In this part the client acknowledges the SYN-ACK packet that was send by server by sending an ACK along with the data packets it want to send(optional), and from here on client and server successfully establish a TCP connection.