What port range refers to dynamic or private ports?

Question

Options

• APorts 49152 ?65535
• BPorts 80, 443, 65431
• CPorts 1024 ?49151
• DPorts 0 ?1023

• A
  90% (27)
• B
  3% (1)
• C
  3% (1)
• D
  3% (1)

Explanation

According to the Internet Assigned Numbers Authority (IANA), port numbers are divided into three ranges: Known Ports (0- 1023), Registered Ports (1024-49151), and Dynamic or Private Ports (49152-65535). The dynamic or private ports are those from 49152 to 65535. These ports are typically used for ephemeral ports, which are temporary and only used for the duration of a specific communication session (see ISC2 Study Guide, Chapter 4, Module 1). For example, when a web browser makes a request to a web server, it uses a dynamic port number for the outgoing connection. This port number is chosen from the dynamic or private range (49152- 65535). This allows the web browser to maintain multiple concurrent connections to the server, each with a unique port number.

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