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Telnet

Telnet is a command line tool developed in 1969 for accessing remote systems using a client-server protocol over port 23. It allows users to edit files, run programs, and configure network devices, but is not preferred due to its lack of security as it transmits data in clear text. Despite its advantages of speed and cross-platform compatibility, the security concerns have led to the preference for more secure alternatives like SSH.

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Abirami Sekar
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37 views9 pages

Telnet

Telnet is a command line tool developed in 1969 for accessing remote systems using a client-server protocol over port 23. It allows users to edit files, run programs, and configure network devices, but is not preferred due to its lack of security as it transmits data in clear text. Despite its advantages of speed and cross-platform compatibility, the security concerns have led to the preference for more secure alternatives like SSH.

Uploaded by

Abirami Sekar
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as PDF, TXT or read online on Scribd
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WHAT ISTELNET?

+ Command line tool (Text-Oriented) to access remote system.


+ Teletype Network.
CLIENT SERVER
+Developed in 1969.
+ Client-Server Protocol (Bidirectional).
+Uses port 23.
WHY TELNET IS USED?

+ Command line toolto access remote computer.

telnet 192.168.0.1
WHY TELNET IS USED?
+ Command line tool to access remote computer.
+ Edit files, run programs.
+ To check open ports.

telnet 192.168.0.1 443


WHY TELNET IS USED?
+ Command line toolto access remote computer.
+Edit files, run programs.
+ Tocheck open ports.
+ Configure network devices like routers, switches etc.
How TELNET WORKS?

TERMINAL ApPLICATIONS</
INTERNET

HTerminal Driver

OS
Physical
Data Link

Internet
Physical
Data Link

Internet
Pseudoterminal
Driver

OS
TCP TCP

TELNET Client
NVTe
TELNET Server
(NETWORK VIRTUAL TERMINAL)
ADVANTAGES OF TELNET

+ Access remote computer.


+Fast (No GU).
+ Bidirectional

+ Cross-Platform (Windows, Mac, Linux).


DiSADVANTAGES OF TELNET
+ Not Secure. (Clear-Text)

Usernamne: bob, Password: mypassword


WHY TELNET IS NoT PREFERRED?
+ Not Secure. (Clear-Text)
CLIENT SERVER
WHY TELNET IS NOT PREFERRED?
+ Not Secure. (Clear-Text)
CLIENT SERVER

SSH

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