Answer:
Folllows are the solution to the given points:
Explanation:
In this question, the server uses special port 21 and 20 for the command and data transfer. A customer uses a random short-term N > 1023 and N+1 ports Listen and the Ports may be randomly distributed and the following samples are given for:
In point (a):
X: 1030 Client, W server: 21 (service)
W: 20 server (data) ,Client X:1031
In point (b):
Server W: 21 (command) Client Y: 1035
Client Y: 1036, (data) Server W: 20
In point (c):
Client X: 1030, Server W: 21.
Client X: 1031, (data) Server W: 20
In point (d):
Client X: 1035, Server W: 21.
Client X: 1036 ,(data): Server W: 20.
In point (e):
Yes, it's an opportunity. It can be the same as a certain likelihood.
In point (f):
The port of the server is the norm. If W and Y are on the same host, the client's port numbers can vary.
