Q19

MSQ1 mark

$\mathrm{TCP}$ client $\mathrm{P}$ successfully establishes a connection to $\text{TCP}$ server $\mathrm{Q}$ . Let $\text{N}_{P}$ denote the sequence number in the $\text{SYN}$ sent from $\mathrm{P}$ to $\mathrm{Q}$ . Let $\text{N}_{Q}$ denote the acknowledgement number in the SYN ACK from $\text{Q}$ to $\text{P}$ . Which of the following statements is/are CORRECT?

(A)

The sequence number $\text{N}_{P}$ is chosen randomly by $\mathrm{P}$

(B)

The sequence number $\text{N}_{P}$ is always $0$ for a new connection

(C)

The acknowledgement number $\text{N}_{Q}$ is equal to $\text{N}_{P}$

(D)

The acknowledgement number $\text{N}_{Q}$ is equal to $\text{N}_{P}+1$

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