what is SSH ? | Explained Secure SHell protocol | how SSH work ? | CCNA 200-301

SSH stands for Secure Shell, the default port for SSH client connections is 22 and it is a protocol that also allows you to communicate with another computer using a text-based interface. However, SSH has some features that make it more secure and versatile than telnet.
SSH encrypts the data that is exchanged between the computers, preventing anyone from intercepting or modifying it.
Also supports authentication, which means that you need to provide a password or a key to access the remote computer.
SSH can also tunnel other protocols, such as FTP, through its encrypted connection, allowing you to transfer files or run graphical applications remotely.
SSH also authenticates the remote computer and the user, ensuring that you are connecting to the right host and that only authorized users can access it.
And compress the data, which can improve the performance and bandwidth usage of the connection.
One of the disadvantages of SSH is its complexity and configuration. Requires some software and settings to use, and it may not be compatible with some older or simpler devices. Also requires some knowledge and skills to use properly, such as generating and managing keys, choosing encryption algorithms, or troubleshooting errors. , since it has some encryption and authentication overhead.