What technology should be used when a router that connects to a LAN has only one WAN interface, but multiple virtual circuits are needed?

The network administrator is using a Windows PC application that is called putty.exe for remote communication to a switch for network troubleshooting. Which two protocols could be used during this communication? (Choose two).

Which command will set the default gateway to 192.168.12.1 on a Cisco switch?

What happens when computers on a private network attempt to connect to the Internet through a Cisco router running PAT?

The following commands are entered on the router:
Burbank(config)# enable secret fortress
Burbank(config)# line con 0
Burbank(config-line)# login
Burbank(config-line)# password n0way1n Burbank(config-line)# exit
Burbank(config)# service password-encryption
What is the purpose of the last command entered?