NET 126 CH 9

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? It works together with VRRP. GLBP allows load balancing between routers. It is nonproprietary. It uses a virtual router master.

GLBP allows load balancing between routers.

What is the purpose of HSRP? It prevents malicious hosts from connecting to trunk ports. It prevents a rogue switch from becoming the STP root. It enables an access port to immediately transition to the forwarding state. It provides a continuous network connection when a router fails.

It provides a continuous network connection when a router fails.

Which statement describes a characteristic of GLBP? It provides load balancing for a maximum of four gateways. It provides automatic rerouting if any router in the group fails. It provides multiple virtual IP addresses and multiple virtual MAC addresses. It does not provide support for IPv6.​

It provides automatic rerouting if any router in the group fails.

A network administrator is analyzing first-hop router redundancy protocols. What is a characteristic of VRRPv3? VRRPv3 is Cisco proprietary. It supports IPv6 and IPv4 addressing. It works together with HSRP. It allows load balancing between routers.

It supports IPv6 and IPv4 addressing.

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.) static route MAC address hostname IP address BID

MAC address IP address

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.

Gateway Load Balancing Protocol (GLBP)

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.

GLBP for IPv6

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

HSRP for IPv6

This is a Cisco-proprietary FHRP that provides the same functionality of HSRP, but in an IPv6 environment. An HSRP IPv6 group has a virtual MAC address derived from the HSRP group number and a virtual IPv6 link-local address derived from the HSRP virtual MAC address. Periodic router advertisements (RAs) are sent for the HSRP virtual IPv6 link-local address when the HSRP group is active. When the group becomes inactive, these RAs stop after a final RA is sent.

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. This allows several routers on a multiaccess link to use the same virtual IPv4 address. A VRRP router is configured to run the VRRP protocol in conjunction with one or more other routers attached to a LAN. In a VRRP configuration, one router is elected as the virtual router master, with the other routers acting as backups, in case the virtual router master fails.

VRRPv3

This provides the capability to support IPv4 and IPv6 addresses. VRRPv3 works in multi-vendor environments and is more scalable than VRRPv2.

A user needs to add redundancy to the routers in a company. What are the three options the user can use? (Choose three.) VRRP GLBP STP IPFIX RAID HSRP

VRRP GLBP HSRP

Which two protocols provide gateway redundancy at Layer 3? (Choose two.) PVST VRRP STP HSRP RSTP

VRRP HSRP

Which nonproprietary protocol provides router redundancy for a group of routers which support IPv4 LANs? HSRP SLB VRRPv2 GLBP

VRRPv2

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? virtual router standby router default gateway Layer 3 switch

default gateway

What device that is part of a virtual router group assigned to the role of default gateway? virtual router forwarding router default gateway Layer 3 switch

forwarding router

In FHRP terminology, what represents a set of routers that present the illusion of a single router to hosts? forwarding router default gateway standby router virtual router

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 forwarding router default gateway Layer 3 switch

virtual router

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. True False

False

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? FHRP VRRP HSRP GLBP

GLBP

What is the default HSRP priority? 50 100 150 255

100

Hot Standby Router Protocol (HSRP)

HRSP is a Cisco-proprietary FHRP that is designed to allow for transparent failover of a first-hop IPv4 device. HSRP provides high network availability by providing first-hop routing redundancy for IPv4 hosts on networks configured with an IPv4 default gateway address. HSRP is used in a group of routers for selecting an active device and a standby device. In a group of device interfaces, the active device 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. 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.

A network administrator is overseeing the implementation of first hop redundancy protocols. Which two protocols are Cisco proprietary? (Choose two.) HSRP VRRPv2 GLBP IRDP VRRP

HSRP GLBP

Which FHRPs are Cisco-proprietary? (Choose two.) IRDP HSRP HSRP for IPv6 VRRPv2

HSRP HSRP for IPv6

What is a potential disadvantage when implementing HSRP as compared to GLBP? HSRP provides default gateway failover only when the active router fails. HSRP does not have the capability to support IPv6 addresses. HSRP does not provide load balancing with multiple active routers. HSRP does not function in a multivendor environment.

HSRP does not provide load balancing with multiple active routers.

During which HSRP state does an interface begin sending periodic hello messages? initial listen speak active

speak

What device is part of a virtual router group assigned the role of alternate default gateway? virtual router standby router default gateway Layer 3 switch

standby router

Which is a characteristic of the HSRP learn state? the router has not determined the virtual IP address the router knows the virtual IP address the router sends periodic hello messages the router actively participates in the active/standby election process

the router has not determined the virtual IP address