SSH
Telnet provides not encrypted connectivity to servers and workstations through terminal type of connection. It uses command-line type.
Pinging a server just checks that Particular system is present on the network. Telnet or SSH are application to login the server from remote and use the services provided by the server. In TELNET DATA is not encrypted so it's easy to hack. In SSH DATA is encrypted so it's safe.
A telnet program is essentialy a remote terminal application, used to connect to a remote computer and interact with it in text mode (command line) only. It operates over a TCP/IP network, and uses TCP port 23. The telnet conversation is completely open, not encrypted in any way, starting from the logon (username/password entry), and therefore should be avoided on untrusted networks, where it can be easily sniffed ("overheard" by anybody that analyzes the network traffic). A secure alternative to telnet is called ssh (secure shell).
Ciphertext is another name for Encrypted
rsh and ssh are similar in that they can execute commands on remote systems. The main difference between the two (besides the actual TCP ports) is that rsh traffic is not encrypted and therefore a security risk; ssh traffic is encrypted. The other main difference is that ssh is a secure replacement for telnet, whereas rsh can log into a remote system using the rlogin protocol, which is similar but not the same as telnet.
Telnet.
Telnet use port number 23,and connected to TCP
telnet hostname.com 1521
---- == == This is used by the program notepad!
full form of telnet is tele network.
because telnet sucks!!
FTP and Telnet are similar in that they are defined as OSI layer 7 (application) protocols. They are different in that they use different ports for sending and receiving messages and are used for different purposes. FTP is used to sending and receiving files across a network. Telnet is used to send commands remotely to another network device.