You are creating a configuration to use on a switch. The configuration must enable you to remotely manage the switch.

Which of the following command sets is correct? (Assume the commands are executed at the correct prompt.)

A. interface vlan 1ip address 192.168.20.244 255.255.255.240no shutdownexitip default-gateway 192.168.20.241line vty 0 15password ciscologinexit

B. interface fastethernet 0/1ip address 192.168.20.244 255.255.255.240no shutdownexitip default-gateway 192.168.20.241line vty 0 15password ciscologinexit
C. interface vlan 1ip address 192.168.20.244 255.255.255.240no shutdownexitip route 192.168.20.241line vty 0 15loginexit
D. interface vlan 1ip address 192.168.20.244 255.255.255.240no shutdownexitip default-gateway 192.168.20.241line con 0 15password ciscologinexit
E. interface vlan 1ip address 192.168.20.244 255.255.255.240no shutdownexitip default-gateway 192.168.20.27line vty 0 15password ciscologinexit
F. interface vlan 1ip address 192.168.20.244 255.255.255.240shutdownexitip default-gateway 192.168.20.241line vty 0 15password ciscologinexit

Explanation:

The following command set is correct:

interface vlan 1
ip address 192.168.20.244 255.255.255.240
no shutdown
exit
ip default-gateway 192.168.20.241
line vty 0 15
password cisco
login
exit

It sets an IP address for VLAN 1, which is the management VLAN. Next, it sets a default gateway that is in the same network with the IP address. It correctly enables the interface, sets a required password on the VTY lines, and sets the switch to prompt for the password.

Switches do not need IP addresses unless you want to remotely manage the devices. When an IP address is assigned to a switch for this purpose, it is not applied to a physical interface. It is applied to the VLAN 1 interface, which is the management VLAN by default.

The following command set is incorrect because it applies the IP address to the fastethernet 0/1 interface, rather than the management VLAN. When you set an IP address for the switch, you do so on the management VLAN, not one of the physical interfaces.

interface fastethernet 0/1
ip address 192.168.20.244 255.255.255.240
no shutdown
exit
ip default-gateway 192.168.20.241
line vty 0 15
password cisco
login
exit

The following command set is incorrect because it does not set a password on the VTY lines, which is required to connect with Telnet unless you include the no login command.

interface vlan 1
ip address 192.168.20.244 255.255.255.240
no shutdown
exit
ip default-gateway 192.168.20.241
line con 0 15
login
exit

The following command set is incorrect because it sets the password in the console line rather than the VTY lines.

interface vlan 1
ip address 192.168.20.244 255.255.255.240
no shutdown
exit
ip default-gateway 192.168.20.241
line con 0 15
password cisco
login
exit

The following command set is incorrect because the address for VLAN1 and the gateway are not in the same subnet. With a 28-bit mask the interval is 16, which means the network that the gateway is in is the 192.168.20.16/28 network and VLAN 1 is in the 192.1683.20.240/28 network.

interface vlan 1
ip address 192.168.20.244 255.255.255.240
no shutdown
exit
ip default-gateway 192.168.20.27
line vty 0 15
password cisco
login
exit

The following command set is incorrect because the VLAN 1 interface has been disabled with the shutdown command.

interface vlan 1
ip address 192.168.20.244 255.255.255.240
shutdown
exit
ip default-gateway 192.168.20.241
line vty 0 15
password cisco
login
exit

Objective:
Infrastructure Management
Sub-Objective:
Configure and verify device management

References:
Home>Support>Product Support>End-of-Sale and End-of-life Products>Cisco Catalyst 6000 Series Switches>Troubleshoot and Alerts> Troubleshooting TechNotes>Configuring a Management IP Address on Catalyst 4500/4000, 5500/5000, 6500/6000, and Catalyst Fixed Configuration Switches