What is telnet, SSH.pptx 123456789106987456

telnet and ssh

1. What is telnet [Teletype Network]: -> Telnet is a network protocol that allows users to remotely access and control computers over a network.  -> It is a client-server protocol that uses text-based input and output to establish a connection with a remote computer. 

2. How does Telnet work? -> Telnet uses the Transmission Control Protocol/Internet Protocol (TCP/IP) to connect to remote computers. -> The remote computer acts as a server and waits for commands from the client. -> A client-server connection is established over TCP port 23.

3. Configuration : Router# configure terminal Router(config)#line vty 0 4 Router(config-line)#password network Router(config-line)#login How to Access Telnet: It can be from any device like router, Computer.

4. What is SSH [ Secure Shell ] -> Secure Shell (SSH) is a network protocol that allows secure communication between computers over an unsecured network. -> It's often used to remotely access and manage systems and applications. -> Connection is established over TCP port 22.

5. How SSH works ? -> Uses cryptography to authenticate and encrypt connections between devices. -> Uses public key cryptography to verify the identity of the server. -> Uses strong symmetric encryption and hashing algorithms to protect data

6. Router(config)#username john password ccna@123 Router(config)#line vty 0 15 Router(config-line)#login local Router(config-line)#transport input ssh Router(config-line)# ip domain name ict.com R1(config)#crypto key generate rsa How many bits in the modulus [512]: 1024

7. R1#show crypto key mypubkey rsa % Key pair was generated at: 0:23:47 UTC March 1 1993 Key name: R1.ict.com Storage Device: not specified Usage: General Purpose Key Key is not exportable. Key Data: 00001155 000002c5 00001ee6 00003163 00005cbe 00002be6 00001db5 0000719f 0000644a 000041c0 000046eb 000064f6 00002fa0 000018f2 000019fa 0000551e 00004969 00001a11 00000372 00004979 00007454 0000329d 00005a23 1fa2 % Key pair was generated at: 0:23:47 UTC March 1 1993 Key name: R1.ict.com.server Temporary key Usage: Encryption Key Key is not exportable. Key Data: 0000315e 00005233 00003786 00001246 00007b50 00004805 00002f59 00002235 00005b89 00001488 00002a8a 000015b8 00003bfd 0000036c 00006956 00000226 00001a7e 000021d1 000070b2 000013b2 0000013b 000064b8 000066ea 0787

8. How to SSH: