A one word answer to this question is Encryption. Basically both Telnet and SSH are terminal emulators and are used to access your system remotely, means that you can login you system through internet or over a network and issue commands. SSH just encrypts your connection to the remote machine so when you send your password or commands over the network someone else cannot sniff the packets and interpret your password as it in encoded while if you are using Telnet than all your passwords and information will be transferred over the network as plain text and some rogue party can easily interpret that through packet sniffers

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  1. Sunil Patil @ 2010-03-30 07:30

    thanks, this answer satisfied me, thanks once again

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