Exploring Layer 3 Redundancy Flashcards
You have installed a second router in your company’s branch office to provide default gateway redundancy for host connections to the main office through your wide-area network (WAN). Which statement is correct?
A. The second router can be connected in the network without additional configuration, since the clients can automatically find the second gateway during primary router failures.
B. The second router alone does not guarantee the default gateway uptime, so you need an extra feature on the routers that can provide default gateway redundancy to the clients.
C. The primary router will detect the presence of the secondary router without additional configuration, and will form a cluster of routers for default gateway redundancy to the clients.
D. The primary and the second router should have IGP between them, so the clients can automatically find the second gateway during primary router failures.
B. The second router alone does not guarantee the default gateway uptime, so you need an extra feature on the routers that can provide default gateway redundancy to the clients.
Which three protocols are examples of FHRP? (Choose three.)
A. ARP
B. GLBP
C. HSRP
D. EIGRP
E. RIP
F. VRRP
B. GLBP
C. HSRP
F. VRRP
What is HSRP?
A. HSRP is an FHRP that is designed by Cisco to create a redundancy framework between network routers or Layer 3 switches to achieve default gateway failover capabilities.
B. HSRP is a peering feature in the Hot Standby Router Protocol group member health monitoring system.
C. HSRP is a Hot Standby Router Protocol that needs low CPU memory consumption and no processing overhead.
D. HSRP is routing protocol that enables routers to dynamically exchange routing information and properly update routing tables to reflect a failed link in the network.
A. HSRP is an FHRP that is designed by Cisco to create a redundancy framework between network routers or Layer 3 switches to achieve default gateway failover capabilities.
When IPv4 hosts operate on a subnet with routers R1 and R2 configured with HSRP, which IPv4 address should these hosts configure as their default gateway??
A. R1 IPv4 address
B. R2 IPv4 address
C. virtual IPv4 address
D. broadcast IPv4 address
C. virtual IPv4 address
The correct answer is the “virtual IPv4 address.” HSRP uses virtual IPv4 address, which is shared between routers and is always available if one of the HSRP enabled routers is active. The active router always processes the packets that are sent to the virtual IPv4 address, which should be configured as default gateway to hosts. Thus, the host should not configure R1 or R2 IPv4 address as their default gateway, and the broadcast IPv4 address in the subnet.
You have enabled HSRP Version 2 between two routers to provide default gateway redundancy to clients. What is the MAC address range that is used for the virtual MAC address, if X represents a variable based on the HSRP group number?
A. 0000.0C07.ACXX
B. 0000.0C07.AXXX
C. 0000.0C9F.FXXX
D. FFFF.FFFF.FFXX
C. 0000.0C9F.FXXX
Which protocol is an open FHRP standard that offers the ability to add more than two routers for additional redundancy?
A. HSRP
B. VRRP
C. ARP
D. DHCP
E. GLBP
B. VRRP
Which statement about the HSRP version 1 hello packets is true?
A. HSRP hello packets are sent to multicast address 224.0.0.2 on UDP port 1985.
B. HSRP hello packets are sent to multicast address 224.0.0.5 on UDP port 1985.
C. HSRP hello packets are sent to multicast address 224.0.0.1 on TCP port 1985.
D. HSRP hello packets are sent to multicast address 224.0.0.10 on UDP port 1986.
A. HSRP hello packets are sent to multicast address 224.0.0.2 on UDP port 1985.
R1 and R2 routers in your company’s infrastructure are participating in HSRP group 1. R1 is the active router with a priority of 120 and R2 has the default priority. You accidently rebooted R1, and R2 became the active router. Once R1 is back online, which statement will be true?
A. R1 will always become the active router.
B. R2 will always remain the active router.
C. R1 will become the active router only if preempt is enabled.
D. Both routers will be in active state.
C. R1 will become the active router only if preempt is enabled.
You configured an important host in your company with a static default gateway pointing to one of the routers in the network. You also have a second router that can provide connectivity to other subnets. What will happen when the primary router fails and there is only a dynamic routing protocol configured between the routers?
A. The host will automatically discover the failure and update its default gateway with the IP address of the second router.
B. The second router will use the dynamic routing protocol to instruct the host to change its default gateway with its IP address.
C. The host should have DHCP provide the default gateway, so the DHCP server can dynamically update the gateway after the failure.
D. The host will lose connection to other subnets, since it cannot dynamically update the default gateway.
D. The host will lose connection to other subnets, since it cannot dynamically update the default gateway.
You have configured two Layer 3 switches with HSRP to provide default gateway redundancy to hosts in VLAN 10 using HSRP version 1 and group 10. What is the virtual MAC address associated with the virtual router if the configured virtual IPv4 address is 10.1.1.1?
A. 1001.0001.001
B. 1001.0c07.ac01
C. 0000.0c07.ac10
D. 0000.0c07.ac0a
D. 0000.0c07.ac0a
What is the function of an FHRP?
A. The FHRP supplies hosts with routing information.
B. The FHRP is a routing protocol.
C. The FHRP provides default gateway redundancy.
D. The FHRP is always standard-based.
C. The FHRP provides default gateway redundancy.
You have been assigned a task to configure two routers as part of an HSRP group. Since you have not configured priority on the routers, which statement is correct?
A. Both routers will be in ACTIVE state.
B. Both routers will be in STANDBY state.
C. Both routers will be in LISTEN state.
D. One router will be in ACTIVE and the other in STANDBY state.
D. One router will be in ACTIVE and the other in STANDBY state.
