COMPUTER NETWORKING

Detailed explanation-1: -Registered ports-Ports in the range 1024 to 49151 are not assigned or controlled, but can be registered to prevent duplication. Dynamic ports-Ports in the range 49152 to 65535 are not assigned, controlled, or registered. They are used for temporary or private ports. They are also known as private or non-reserved ports.

Detailed explanation-2: -Ports with numbers 0–1023 are called system or well-known ports; ports with numbers 1024-49151 are called user or registered ports, and ports with numbers 49152-65535 are called dynamic, private or ephemeral ports.

Detailed explanation-3: -The maximum end port (based on the range being configured) cannot exceed 65535.

Detailed explanation-4: -The TCP port range 49152-65535 is used as an alternative for interaction with iTunes over the network when the primary TCP port (3689) is not available. This is entirely normal and there is no reason to try to close it.