Which command is needed to enable SSH support on a Cisco Router?

Which command is needed to enable SSH support on a Cisco Router?
A . crypto key lock rsa
B . crypto key generate rsa
C . crypto key zeroize rsa
D . crypto key unlock rsa

View Answer

Answer: B

Explanation:

There are four steps required to enable SSH support on a Cisco IOS router:

+ Configure the hostname command.

+ Configure the DNS domain.

+ Generate the SSH key to be used.

+ Enable SSH transport support for the virtual type terminal (vtys).

!— Step 1: Configure the hostname if you have not previously done so. hostname carter

!— The aaa new-model command causes the local username and password on the router

!— to be used in the absence of other AAA statements.

aaa new-model

username cisco password 0 cisco

!— Step 2: Configure the DNS domain of the router.

ip domain-name rtp.cisco.com

!— Step 3: Generate an SSH key to be used with SSH. crypto key generate rsa ip ssh time-out 60 ip ssh authentication-retries 2

!— Step 4: By default the vtys’ transport is Telnet. In this case,

!— Telnet is disabled and only SSH is supported.

line vty 0 4

transport input SSH

Source: http://www.cisco.com/c/en/us/support/docs/security-vpn/secure-shell-ssh/4145­ssh.html#settingupaniosrouterasssh