SSH protects a network from attacks such as IP spoofing, IP source routing, and DNS spoofing.
SSH is mostly used in all popular operating systems like Unix, Solaris, Red-Hat Linux, CentOS, Ubuntu etc.
SSH also uses a public key for the authentication of users accessing a server and it is a great practice providing us extreme security.
Once the data for communication is encrypted using SSH, it is extremely difficult to decrypt and read that data, so our passwords also become secure to travel on a public network.
SSH is a very secure protocol because it shares and sends the information in encrypted form which provides confidentiality and security of the data over an un-secured network such as internet.
SSH runs on port 22 by default however it can be easily changed.
It provides strong authentication and secure communications over insecure channels.
SSH was developed by SSH Communications Security Ltd., it is a program to log into another computer over a network, to execute commands in a remote machine, and to move files from one machine to another. SSH or Secure SHell is now only major protocol to access the network devices and servers over the internet. They are pretty similar when it comes to facility they provide but did SSH come into play when Telnet already existed? If you have been using a linux distro for quite long time now and you are not a newbee at linux anymore then you might have come across the terms like SSH and telnet.
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Dynamic Host Configuration Protocol (DHCP).
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Difference between File Transfer Protocol (FTP) and Secure File Transfer Protocol (SFTP).