Question

On a TCP connection, current congestion window size is Congestion Window = 4 KB. The window size advertised by the receiver is Advertise Window =6 KB. The last byte sent by the sender is Last Byte Sent = 10240 and the last byte acknowledged by the receiver is LastByteAcked = 8192. The current window size at the sender is

• A. 2048 bytes
• B. 4096 bytes
• C. 8192 bytes
• D. 6144 bytes

Answer 1

The correct option is B 4096 bytes

In TCP congestion control
Current window size at sender = min(congestion window. Advertise window)
= min(4 KB. 6 KB)
= 4 KB