Which of the following is the default port for Hypertext Transfer Protocol (HTTP)?

Question

Options

• A20
• B443
• C80
• D21

• A
  12% (4)
• B
  3% (1)
• C
  79% (26)
• D
  6% (2)

Explanation

Hypertext Transfer Protocol (HTTP) is a client/server TCP/IP protocol used on the World Wide Web (WWW) to display Hypertext Markup Language (HTML) pages. HTTP defines how messages are formatted and transmitted, and what actions Web servers and browsers should take in response to various commands. For example, when a client application or browser sends a request to the server using HTTP commands, the server responds with a message containing the protocol version, success or failure code, server information, and body content, depending on the request. HTTP uses TCP port 80 as the default port. Answer: B is incorrect. Port 443 is the default port for Hypertext Transfer Protocol Secure (HTTPS) and Secure Socket Layer (SSL). Answer: A, D are incorrect. By default, FTP server uses TCP port 20 for data transfer and TCP port 21 for session control.

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