Answer the following questions for the TCP header: a. What is the source post fo

Question

Answer the following questions for the TCP header: a. What is the source post for TCP, and what protocol type is using TCP for transport? B. What is the destination pot, and what does the port number indicate? C. What is the acknowledgement number that is expected from the destination for the source? D. What is the header length? To examine TCP under IPv6, does Internet Protocol Version 4 and expand Internet Protocol Version 6. With IPv6 selected has the data under TCP that you previously examined changed? If so, how has it changed? And if not, why has it not changed? When you are finished, close Wirehark.

Explanation / Answer

ANS(a):(i) Source port is similar to the destination port.Source port and destination port are communication end points.Source port is used to identify that which application or service is sending the data to destination.When Receiver (as in Destination port ) get the request and send the response back to the sender then it should know where to send the data.Destination knows the IP address of host but there are many application running on that particular host ,So to know that Which application is communicating to the destination? Source port is required.

(ii)The known transport protocol for TCP/IP is Transmission Control Protocol.

ANS(b): (i)Destination port is the port number of an application which is requested on the destination host by the Source host 's application.

(ii)Port number is 16-bit integer present in TCP header ,which is used to identify a specific process or application running on a host to which communication is maintained by the internet when it arrives at the server.

ANS(c):Acknowledge number is the sequence no. of byte that is expected next by the receiver.These numbers are used to keep track that the data are not lost.TCP uses positive acknowledge ,retransmission ,timeout to make sure the ordered delivery of user data.It is expected from the destination by the receiver to know that the data is delivered to the destination successfully and now the destination requesting for next byte.

ANS(d):TCP header length is 20-40 byte.

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