Telnet vs SSH

In this tutorial, we will understand the difference between the TELNET and SSH in Computer Networks.

TELNET is basically the short form for TErminal NETwork.It is basically a TCP/IP protocol that is used for virtual terminal services and was mainly proposed by International Organization for Standards(ISO).

• It is a general-purpose client/server application program.

• This program enables the establishment of the connection to the remote system in such a way that the local system starts to appear as a terminal at the remote system.

• It is a standard TCP/IP protocol that is used for virtual terminal service.

• In simple words, we can say that the telnet allows the user to log on to a remote computer. After logging on the user can use the services of the remote computer and then can transfer the results back to the local computer.

• The TELNET was mainly designed at the time when most operating systems operate in the time-sharing environment. And in this type of environment, a large computer can support multiple users. Usually, the interaction between the computer and user occurs via terminal(It is a combination of keyboard, mouse, and monitor).

• TELNET makes the use of only one TCP/IP connection.

SSH is an abbreviation of Secure Shell. It is one of the major protocol that is used in order to access the network devices and servers over the Internet.

• It is basically a network protocol and it mainly runs on top of TCP/IP protocol.

• It is widely used to manage and access devices remotely.

• Also, the secure shell(SSH) mainly enables the two remotely connected users in order to perform network communication and other services on the top of an unsecured network.

• Thus it provides secure client/server communication and it can also be used for other tasks like file transfer and e-mail.

• With the help of SSH, you can log in to another computer over the network and it allows you to execute the commands on the remote machine.

• You can easily move files from one machine to another.

• This protocol mainly encrypts the traffic in both directions; with the help of this feature, you can prevent trafficking, sniffing, and password theft.

• By default, SSH runs on Port number 22 and you can also change it.

• It is suitable for Public Networks.

Difference between TELNET and SSH

Let us now take a look at the differences between TELNET and SSH:

TELNET Commands

Given below are some important TELNET commands:

• Open
  The open command in TELNET is mainly used to open the hostname port number in order to establish a Telnet connection to the host

• Close
  This command mainly helps you to close an existing Telnet connection

• Quit
  This command is used to take an exit from Telnet

• Status
  This command is mainly used to determine whether the Telnet client is connected or not.

• Timing Mark
  This command is mainly used to define the timing marks.

• Terminal Type/Speed
  This command is mainly used to set the terminal type and speed.

SSH Commands

Given below are some important commands used for SSH:

• ls
  It is used to show the directory contents (mainly it list out the names of the files).

• cd
  This command mainly helps you to change the directory

• mkdir
  This command helps you to create a new folder/directory.

• touch
  This command mainly allows you to remove a file.