COMPUTER SOFTWARE
OPERATING SYSTEMS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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20
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21
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22
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23
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Detailed explanation-1: -Telnet uses the TCP port 23 by default. One of the greatest disadvantages of this protocol is that all data, including usernames and passwords, is sent in clear text, which is a potential security risk. This is the main reason why Telnet is rarely used today and is being replaced by a much secure protocol called SSH.
Detailed explanation-2: -For you to telnet to a computer, that port must be open and the telnet service must be enabled on the computer. Port 23 may be disabled because of security reasons. Telnet is unsecure and passes all information including username and password as plaintext. If port 23 is closed, try using SSH instead of Telnet.
Detailed explanation-3: -Port 23 (Telnet) Since it’s outdated and insecure, it’s vulnerable to many attacks, including credential brute-forcing, spoofing and credential sniffing.
Detailed explanation-4: -The default port for Telnet client connections is 23; to change this default, enter a port number between 1024 and 32, 767.