COMPUTER NETWORKS AND COMMUNICATIONS
NETWORK SECURITY AND CYBERSECURITY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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80
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20
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23
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22
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Detailed explanation-1: -The telnet protocol is a client-server protocol, based on a reliable connection-oriented transport. This protocol is used to establish a connection to Transmission Control Protocol (TCP) port number 23 or 2323, where a Telnet server application is listening.
Detailed explanation-2: -The default port for SSH client connections is 22; to change this default, enter a port number between 1024 and 32, 767. The default port for Telnet client connections is 23; to change this default, enter a port number between 1024 and 32, 767.
Detailed explanation-3: -Port 23 (Telnet) Port 23 is a TCP protocol that connects users to remote computers. For the most part, Telnet has been superseded by SSH, but it’s still used by some websites. Since it’s outdated and insecure, it’s vulnerable to many attacks, including credential brute-forcing, spoofing and credential sniffing.