Question

Bytes of data being transferred in each connection are numbered by TCP. These numbers start with a _________

(a) Fixed number

(b) Random sequence of 0’s and 1’s

(c) One

(d) Sequence of zero’s and one’s

I got this question in an interview.

My query is from TCP-1 in section Transport Layer of Computer Network

Answer 1

Right option is (d) Sequence of zero’s and one’s

The best I can explain: One might expect the sequence number of the first byte in the stream to be 0, or 1. But that does not happen in TCP, Instead, the sender has to choose an Initial Sequence Number (ISN), which is basically a random 32 bit sequence of 0’s and 1’s, during the connection handshake.