Module 9 CNG

A network administrator is overseeing the implementation of first hop redundancy protocols. Which two protocols are Cisco proprietary? (Choose two.)

GLBP HSRP

A network administrator is analyzing the features that are supported by different first-hop router redundancy protocols. Which statement is a feature that is associated with GLBP?

GLBP allows load balancing between routers

This is a Cisco-proprietary FHRP that provides the same functionality of GLBP, but in an IPv6 environment.

GLBP for IPv6

What provides automatic router backup for IPv6 hosts configured with a single default gateway on a LAN? Multiple first-hop routers on the LAN combine to offer a single virtual first-hop IPv6 router while sharing the IPv6 packet forwarding load.

GLBP for IPv6

This is a Cisco-proprietary FHRP that protects data traffic from a failed router or circuit, like HSRP and VRRP, while also allowing load balancing (also called load sharing) between a group of redundant routers.

Gateway Load Balancing Protocol (GLBP)

What is a potential disadvantage when implementing HSRP as compared to GLBP?

HRSP does not provide load balancing with multiple active routers

What provides high network availability by providing first-hop routing redundancy for IPv4 hosts on networks configured with an IPv4 default gateway address?.

Hot Standby Router Protocol (HSRP).

When first hop redundancy protocols are used, which two items will be shared by a set of routers that are presenting the illusion of being a single router? (Choose two.)

IP address MAC address

This state is entered through a configuration change or when an interface first becomes available.

Initial

Which statement describes a characteristic of GLBP?

It provides automatic rerouting if any router in the group fails

The router has not determined the virtual IP address and has not yet seen a hello message from the active router. In this state, the router waits to hear from the active router.

Learn

The router knows the virtual IP address, but the router is neither the active router nor the standby router. It listens for hello messages from those routers.

Listen

The router sends periodic hello messages and actively participates in the election of the active and/or standby router.

Speak

ICMP Router Discovery Protocol (IRDP)

Specified in RFC 1256, IRDP is a legacy FHRP solution. IRDP allows IPv4 hosts to locate routers that provide IPv4 connectivity to other (nonlocal) IP networks.

The router is a candidate to become the next active router and sends periodic hello messages.

Standby

What device is part of a virtual router group assigned the role of alternate default gateway?

Standby router

If a router/router interface (that serves as a default gateway) fails, the hosts configured with that default gateway are isolated from outside networks. What mechanism is needed to provide alternate default gateways in switched networks where two or more routers are connected to the same VLANs?

That mechanism is provided by first hop redundancy protocols (FHRPs).

Virtual Router Redundancy Protocol version 2 (VRRPv2)

This is a non-proprietary election protocol that dynamically assigns responsibility for one or more virtual routers to the VRRP routers on an IPv4 LAN.

Hot Standby Router Protocol (HSRP)...

Used in a group of routers for selecting an active device and a standby device.

In a _________________ configuration, one router is elected as the virtual router master, with the other routers acting as backups, in case the virtual router master fails.

VRRP

Which two protocols provide gateway redundancy at Layer 3? (Choose two.)

VRRP HSRP

A ________________ router is configured to run the _____________protocol in conjunction with one or more other routers attached to a LAN.

VRRP VRRP

Which nonproprietary protocol provides router redundancy for a group of routers which support IPv4 LANs?

VRRPv2

This provides the capability to support IPv4 and IPv6 addresses. It works in multi-vendor environments and is more scalable than VRRPv2.

VRRPv3

This allows several routers on a multiaccess link to use the same virtual IPv4 address.

Virtual Router Redundancy Protocol version 2 (VRRPv2)..

In FHRP terminology, what represents a set of routers that present the illusion of a single router to hosts?

Virtual router

What device presents the illusion of a single router to hosts on a LAN segment but actually represents a set of routers working together?

Virtual router

In a group of device interfaces, the ___________________ is the device that is used for routing packets; the standby device is the device that takes over when the active device fails, or when pre-set conditions are met.

active device

By default, after a router becomes the active router, it will remain the active router even if what?

another router comes online with a higher HSRP priority.

How does HSRP ensure high network availability?

by providing first-hop routing redundancy for IP hosts on networks configured with an IP default gateway address.

When is the role of the active and standby routers is determined?

during the HSRP election process.

By default, the router with the numerically _______________________ is elected as the active router.

highest IPv4 address

What is preemption?

is the ability of an HSRP router to trigger the re-election process.

In a group of device interfaces, what is the active device used for?

is the device that is used for routing packets

What is the function of the HSRP standby router?

is to monitor the operational status of the HSRP group and to quickly assume packet-forwarding responsibility if the active router fails.

What is the purpose of HSRP?

it provides a continuous network connection when a router fails

A network administrator is analyzing first-hop router redundancy protocols. What is a characteristic of VRRPv3?

it supports IPv6 and IPv4 addressing

An HSRP IPv6 group has a virtual MAC address derived from the HSRP group ________________ and a ___________________________ derived from the HSRP __________________________.

number virtual IPv6 link-local address virtual IPv6 link-local address

What must be enabled to force a new HSRP election process to take place when a higher priority router comes online?

preemption must be enabled

How do you enable preemption?

using the standby preempt interface command

One way to prevent a single point of failure at the default gateway is to implement a _________________.

virtual router

The router won the election.

Active

What type of device routes traffic destined to network segments beyond the source network segment for which the sending node may not have explicit routing information?

Default gateway

True or False? If a router with a higher HSRP priority joins the network, it will take over the active router roll from an existing active router which has a lower priority.

False

What device that is part of a virtual router group assigned to the role of default gateway?

Forwarding router

A network engineer is configuring a LAN with a redundant first hop to make better use of the available network resources. Which protocol should the engineer implement?

GLBP

By default, the HSRP priority is________.

100

What is the default HSRP priority?

100

What is used in a group of routers for selecting an active device and a standby device?

HSRP

______________ is a Cisco-proprietary FHRP that is designed to allow for transparent failover of a first-hop IP device.

HSRP

Which FHRPs are Cisco-proprietary? (Choose two.)

HSRP HSRP for IPv6

A user needs to add redundancy to the routers in a company. What are the three options the user can use? (Choose three.)

HSRP VRPP GLBP

This is a Cisco-proprietary FHRP that provides the same functionality of HSRP, but in an IPv6 environment.

HSRP for IPv6

The router with the highest _________________ will become the active router.

HSRP priority

__________________ can be used to determine the active router.

HSRP priority

a Cisco-proprietary FHRP that is designed to allow for transparent failover of a first-hop IPv4 device.

Hot Standby Router Protocol (HSRP)

During which HSRP state does an interface begin sending periodic hello messages?

speak

To configure a router to be the active router, use the _____________________ interface command. The range of the HSRP priority is ____ to _______.

standby priority 0 255

Which is a characteristic of the HSRP learn state?

the router has not determined the virtual IP address

What happens if the priorities are equal?

the router with the numerically highest IPv4 address is elected as the active router.

In a group of device interfaces, what is the standby device used for?

the standby device is the device that takes over when the active device fails, or when pre-set conditions are met.