Question

Consider the above network. The following table shows all addresses involved in the data transfer from a client at Host A to a server at Host B.

Address Type Host A Router (connection to A) Router (connection to B) Host B
Physical address 103 107 207 205
Logical address AX RX RY BY
Port address 718 --- --- 80

The figure below shows all frames and packets used in the above-mentioned data transfer. Give the answers for the following questions directly in Fig.1.
a) Write down all addresses in the headers of the packet(s). {in the proper positions}
b) Write down all addresses in the headers of the frame(s). {in the proper positions}
c) In the frame shown below, show the places of the trailer field {T} and upper-layer-data field {D}; draw (with dotted lines) the data segment from the transport layer, and then write down the related addresses in the segment header. {in the proper positions, with sender address first}

Answer 1

Answer:

A packet header is the portion of an IP (Internet protocol) packet that precedes its body and contains addressing and other data that is required for it to reach its intended destination. ... Regardless of their size, each packet consists of three main parts: a header, the body, also called the payload, and a trailer.

Answer 2

Answer:

Consider the above network. The following table shows all addresses involved in the data transfer from a client at Host A to a server at Host B.

Address Type Host A Router (connection to A) Router (connection to B) Host B

Physical address 103 107 207 205

Logical address AX RX RY BY

Port address 718 --- --- 80

The figure below shows all frames and packets used in the above-mentioned data transfer. Give the answers for the following questions directly in Fig.1.

a) Write down all addresses in the headers of the packet(s). {in the proper positions}

b) Write down all addresses in the headers of the frame(s). {in the proper positions}

c) In the frame shown below, show the places of the trailer field {T} and upper-layer-data field {D}; draw (with dotted lines) the data segment from the transport layer, and then write down the related addresses in the segment header. {in the proper positions, with sender address first}