IP Services

Question 1

In which GLPB load-balancing algorithm does the AVG in turn point to each AVF virtual MAC address in its ARP reply (default method)?

Answer 1

Round-robin load balancing

Question 2

Which next-hop router redundancy protocol provides backup for an assigned real IP address

Answer 2

Virtual Router Redundancy Protocol (VRRP)

Question 3

What is the HSRP code, in the MAC address, for a virtual router always equal to?

Answer 3

07.ac

Question 4

How is load balancing achieved when implementing Hot Standby Router Protocol (HSRP)?

Answer 4

By using multiple HSRP groups

Question 5

In which GLPB load-balancing algorithm does the active virtual gateway (AVG) select an AVF virtual MAC address to use in the ARP reply, based on which AVF the host used previously?

Answer 5

Host dependent load-balancing

Question 6

What IP address does the master router in a VRRP group use to advertise hellos to the group members?

Answer 6

224.0.0.18

Question 7

How does Hot Standby Router Protocol (HSRP) provide a gateway IP address to the workstation?

Answer 7

The active HSRP router replies to the workstation’s ARP request with the virtual router’s MAC address

Question 8

What are the tree parts of the MAC address for an HSRP virtual router group?

Answer 8

the vendor ID, the HSRP code, and the group ID

Question 9

When all GLBP routers are left to the default, which router will become the active router?

Answer 9

The router with the highest configured IP address will become the active router

Question 10

What command enables GLBP on an interface?

Answer 10

switch(config-if)#glbp “group-number” ip “ip-address”

Question 11

What protocol defines a set of routers that use a shared IP address that is NOT that of a real router to work together to represent one virtual, fault-tolerant router?

Answer 11

Hot Standby Router Protocol (HSRP)

Question 12

In what state is an HSRP router when it has moved beyond the initial state but not communicated with the active route?

Answer 12

the Learn state

Question 13

In GLBP, what is the term for a router that forwards packets sent to its virtual MAC address

Answer 13

an active virtual forwarder (AVF)

Question 14

How does GLBP perform load balancing?

Answer 14

The active virtual gateway (AVG) will perform load balancing by varying which virtual MAC it selects to use in the response.

Question 15

What is the default priority of all GLBP routers?

Answer 15

100

Question 16

Assuming that preempt is not configured, when does a router in an HSRP group assume the role of the active router for the group?

Answer 16

A router in standby status will become the active router when it does not detect any hello messages from the active router within the configured holdtime.

Question 17

When executed on a HSRP group member named Router 10, what effect does the “Router10(config-if)# standby group 1 track serial0 25” command have?

Answer 17

It will cause the router to decrement its HSRP priority by 25 if Serial 0 goes down

Question 18

What are the three broad guidelines in an implementation plan to provide high availability?

Answer 18

Plan for incremental implementation of each redundant device, require testing after every step is implemented to ensure operation during a failure, and provide rollback procedures for every step

Question 19

In what state is an HSRP router when it hears from the active router and knows the virtual IP address, but is not yet participating in the active and standby router election?

Answer 19

Listen state

Question 20

What is one advantage that HSRP and GLBP have over VRRP?

Answer 20

Both protocols can perform interface tracking, but VRRP cannot.

Question 21

What IP address do GLBP members use to communicate through hello messages?

Answer 21

224.0.0.102

Question 22

In GLBP, which router creates the virtual MAC addresses that are assigned to each of the routers in the group?

Answer 22

the active virtual gateway (AVG)

Question 23

What is the HSRP virtual router MAC address for the virtual router for HSRP group 31?

Answer 23

0000.0c07.ac1f

Question 24

Which command enables Hot Standby Route Protocol (HSRP) on an interface?

Answer 24

switch(config-if)# standby “group-number” ip “ip-address”

Question 25

What is a Cisco-designed protocol that provides for the dynamic utilization of redundant routers in a broadcast network?

Answer 25

Gateway Load Balancing Protocol (GLBP)

Question 26

What RFC specifies Hot Standby Router Protocol (HSRP)?

Answer 26

RFC 2281

Question 27

If the VRRP IP address is NOT the physical address of one of the VRRP routers, which router will assume the role of the master?

Answer 27

the router with the highest priority

Question 28

What is the result of the routerA(config-if)# standby 2 track interface fa0/2 command?

Answer 28

If the fa0/2 interface goes down, router A will reduce its HSRP priority by 10.

Question 29

What router redundancy protocol uses an active virtual gateway (AVG) and an active virtual forwarder (AVF)?

Answer 29

Gateway Load Balancing Protocol (GLBP).

Question 30

In what state is an HSRP router when it participates in the active and standby router election and sends hello messages to the active router?

Answer 30

Speak State

Question 31

In which GLBP load-balancing algorithm is the virtual MAC address sent in ARP replies by the AVF based proportionally on the advertised weight value configured in a GLBP gateway?

Answer 31

Weighted load balancing

Question 32

Which step should be included in a network implementation plan to provide for high availability in case of failure?

Answer 32

Rollback procedures should be included for every step in the implementation plan for the redundant devices