Refer to the exhibit.

Host A and Host B are connected to the Cisco Catalyst 3550 switch and have been assigned to
their respective VLANs. The rest of the 3550 configuration is the default configuration. Host A is
able to ping its default gateway, 10.10.10.1, but is unable to ping Host B. Given the output in the
exhibit, which statement is true?

A.
HSRP must be configured on SW1.

B.
A separate router is needed to support inter-VLAN routing.

C.
Interface VLAN 10 must be configured on the SW1 switch.

D.
The global configuration command ip routing must be configured on the SW1 switch.

E.
VLANs 10 and 15 must be created in the VLAN database mode.

F.
VTP must be configured to support inter-VLAN routing.

Explanation:
To transport packets between VLANs, you must use a Layer 3 device. Traditionally, this has been
a router’s function. The router must have a physical or logical connection to each VLAN so that it
can forward packets between them. This is known as interVLAN routing.
Multilayer switches can perform both Layer 2 switching and interVLAN routing, as appropriate.
Layer 2 switching occurs between interfaces that are assigned to Layer 2 VLANs or Layer 2
trunks. Layer 3 switching can occur between any type of interface, as long as the interface can
have a Layer 3 address assigned to it.

Switch(config)#ip routing command enables the routing on Layer 3 Swtich
References
http://www.cisco.com/en/US/tech/tk389/tk815/technologies_configuration_example09186a008009
49fd.shtml
http://www.net130.com/tutorial/cisco-pdf/howto_L3_intervlanrouting.pdf