Explain primary and secondary connection with port numbers from client to agent machine?

Question

Accepted Answer

Primary and secondary connections with port numbers are used for communication between client and agent machines.

Primary connection is established using a well-known port number, such as port 80 for HTTP.
Secondary connection is established using a random port number, which is assigned by the client machine.
Primary connection is used for initial communication and negotiation, while secondary connection is used for data transfer.
Secondary connection can be closed and reopened multiple times during a single session.
Examples of primary and secondary connections include FTP (port 21 for primary, random port for secondary) and SSH (port 22 for primary, random port for secondary).

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