You have just purchased a new Cisco 3560 switch running the enhanced IOS and need
configure it to be installed in a high availability network. On a 3560 EMI switch, which three
types of interfaces can be used to configure HSRP? (Select three)

A.
SVI interface

B.
Access port

C.
EtherChannel port channel

D.
Loopback interface

E.
Routed port

F.
BVI interface

Explanation:
HSRP is a Cisco-proprietary protocol developed to allow several routers (or multilayer
switches) to appear as a single gateway IP address. RFC 2281 describes this protocol in
more detail.
Basically, each of the routers that provides redundancy for a given gateway address is
assigned to a common HSRP group. One router is elected as the primary, or active, HSRP
router; another is elected as the standby HSRP router; and all the others remain in the listen

HSRP state. The routers exchange HSRP hello messages at regular intervals so they can
remain aware of each other’s existence and that of the active router.
An HSRP group can be assigned an arbitrary group number, from 0 to 255. If you configure
HSRP groups on several VLAN interfaces, it can be handy to make the group number the
same as the VLAN number. However, most Catalyst switches support only up to 16 unique
HSRP group numbers. If you have more than 1 6 VLANs, you will quickly run out of group
numbers. An alternative is to make the group number the same (that is, 1) for every VLAN
interface. This is perfectly valid because the HSRP groups are only locally significant on an
interface. In other words, HSRP Group 1 on interface VLAN 10 is unique and independent
from HSRP Group 1 on interface VLAN 11. HSRP can be configured on SVI, Etherchannel
and Routed port.