FUNDAMENTALS OF COMPUTER

COMPUTER THREATS SECURITY

WHAT IS A FIREWALL IN NETWORK SECURITY

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Which of the following network services or protocols uses TCP/IP port 22?

A	SSH
B	TFTP
C	NNTP
D	IMAP4

Explanation:

Detailed explanation-1: -An SSH server, by default, listens on the standard Transmission Control Protocol (TCP) port 22.

Detailed explanation-2: -Which of the following network services or protocols uses TCP/IP port 22? The Secure Shell (SSH) service uses TCP/IP port 22. SSH is a terminal emulation program that provides a secure authenticated connection to a remote system over the network.

Detailed explanation-3: -The hypertext transfer protocol (HTTP) uses TCP/IP port 80. HTTP is the protocol used to send requests to a web server and retrieve web pages from a web server. TCP/IP port 119 is used by the network news transfer protocol (NNTP).

Detailed explanation-4: -TFTP (explanation: The trivial file transfer protocol (TFTP) uses TCP/IP port 69. TFTP is a connectionless service for downloading files from a remote system.

There is 1 question to complete.