Final answer:
The question is asking to identify TCP/IP protocols and their corresponding port numbers. SSH is associated with port 22, FTP with port 21, HTTP with port 80, DNS with port 53, SMTP with port 25, POP3 with port 110, HTTPS with port 443, and Telnet with port 23.
Step-by-step explanation:
The question is asking to identify TCP/IP protocols and their corresponding port numbers.
a) SSH - 22, FTP - 21
SSH stands for Secure Shell and it is a network protocol that provides a secure way to access and manage remote systems. The port number for SSH is 22. FTP stands for File Transfer Protocol, which is used for transferring files between a client and a server. The port number for FTP is 21.
b) HTTP - 80, DNS - 53
HTTP stands for Hypertext Transfer Protocol and it is the protocol used for transmitting web pages over the internet. The default port number for HTTP is 80. DNS stands for Domain Name System and it is used to translate domain names into IP addresses. The port number for DNS is 53.
c) SMTP - 25, POP3 - 110
SMTP stands for Simple Mail Transfer Protocol and it is used for sending emails. The port number for SMTP is 25. POP3 stands for Post Office Protocol version 3 and it is used for retrieving emails from a mail server. The port number for POP3 is 110.
d) HTTPS - 443, Telnet - 23
HTTPS stands for Hypertext Transfer Protocol Secure and it is the secure version of HTTP. The port number for HTTPS is 443. Telnet is a network protocol used to access and manage remote devices. The port number for Telnet is 23.