CN TCP

Question

Imagine a TCP connection is transferring 6000B. First Byte is numbered as 10010.The sequence number of the last byte sent,if data are sent in 5 segments with the first 4 segments carrying 1000B and last segement carrying 2000B are ?

Answer 1

A TCP connection is transferring $6000B$.

• First Byte is numbered as $10010$ as sequence number and carries $1000B$.
• Second byte starts from $10010 + 1000 - 1= 11010$ as sequence number 
• Similarly, third byte from $12010$.
• Third byte from $13010$.
• Last byte has sequence number = $14010$ which carries $2000B$

This procedure is done for "If each segment is encapsulated with sequence number", but question asks for each byte,so.

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Now, each byte gets a sequence number and sequence number of last segment => $10010 + 6000 - 1$ => 16009$ is the last byte sent .

Comments

Yes, that's fine. But, beware of byte and packet 

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@Kapil

Can you explain what happens with packet ?

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@Prajwal, I meant here the difference in answers "in case of byte" and "in case of segment".

I have shown answer for both. Last segment => 14010 and last byte => 16009 .