Exam 1 Review

C. 1

By default, what is the OSPF cost for any link with a bandwidth of 100 Mb/s or greater? A. 10000 B. 100000000 C. 1 D. 100

first state--Down state second state--Init state third state--Two-way state fourth state--Exstart state fifth state--Exchange state sixth state--Loading state seventh state--Full state

Match the OSPF state with the order in which it occurs. (Not all options are used.) --Init state --Active state --Full state --Exchange state --Down state --Exstart state --Passive state --Two-way state --Loading state

C. 192.168.1.100

Refer to the exhibit. If no router ID was manually configured, what would router Branch1 use as its OSPF router ID? A. 10.0.0.1 B. 10.1.0.1 C. 192.168.1.100 D. 209.165.201.1

B. R0-A

Refer to the exhibit. On which router or routers would a default route be statically configured in a corporate environment that uses single area OSPF as the routing protocol? A. ISP, R0-A, R0-B, and R0-C B. R0-A C. ISP D. R0-B and R0-C E. R0-A, R0-B, and R0-C F. ISP and R0-A

A. show ip ospf neighbor

What command would be used to determine if a routing protocol-initiated relationship had been made with an adjacent router? A. show ip ospf neighbor B. ping C. show ip protocols D. show ip interface brief

C. every 30 minutes

When an OSPF network is converged and no network topology change has been detected by a router, how often will LSU packets be sent to neighboring routers? A. every 5 minutes B. every 10 minutes C. every 30 minutes D. every 60 minutes

C. link-state database

Which OSPF data structure is identical on all OSPF routers that share the same area? A. routing table B. forwarding database C. link-state database D. adjacency database

B. show ip protocols

Which command is used to verify that OSPF is enabled and also provides a list of the networks that are being advertised by the network?​ A. show ip interface brief B. show ip protocols C. show ip route ospf D. show ip ospf interface

C. Down, D. Init, & F. Two-way

Which three OSPF states are involved when two routers are forming an adjacency? (Choose three.) A. Exchange B. Loading C. Down D. Init E. ExStart F. Two-way

C. router(config-router)# network 172.16.1.0 0.0.0.255 area 0

An OSPF router has three directly connected networks; 172.16.0.0/24, 172.16.1.0/24, and 172.16.2.0/24. Which OSPF network command would advertise only the 172.16.1.0 network to neighbors? A. router(config-router)# network 172.16.1.0 0.0.255.255 area 0 B. router(config-router)# network 172.16.0.0 0.0.15.255 area 0 C. router(config-router)# network 172.16.1.0 0.0.0.255 area 0 D. router(config-router)# network 172.16.1.0 0.0.0.0 area 0

D. It tells the router which interface to turn on for the OSPF routing process.

In an OSPFv2 configuration, what is the effect of entering the command network 192.168.1.1 0.0.0.0 area 0 ? A. It changes the router ID of the router to 192.168.1.1. B. It allows all 192.168.1.0 networks to be advertised. C. It enables OSPF on all interfaces on the router. D. It tells the router which interface to turn on for the OSPF routing process.

C. Change the subnet mask of interface FastEthernet 0/0 to 255.255.255.0.

Open the PT Activity. Perform the tasks in the activity instructions and then answer the question.Which task has to be performed on Router 1 for it to establish an OSPF adjacency with Router 2? A. Remove the passive interface command from interface FastEthernet 0/0. B. Issue the clear ip ospf process command. C. Change the subnet mask of interface FastEthernet 0/0 to 255.255.255.0. D. Add the network 10.0.1.0 0.0.0.255 area 0 command to the OSPF process.

D. 65

Refer to the exhibit. What is the OSPF cost to reach the router A LAN 172.16.1.0/24 from B? A. 782 B. 74 C. 128 D. 65

B. show ip ospf interface serial 0/0/0

Which command will a network engineer issue to verify the configured hello and dead timer intervals on a point-to-point WAN link between two routers that are running OSPFv2? A. show ip ospf neighbor B. show ip ospf interface serial 0/0/0 C. show ip ospf interface fastethernet 0/1 D. show ipv6 ospf interface serial 0/0/0

D. database description

Which type of OSPFv2 packet contains an abbreviated list of the LSDB of a sending router and is used by receiving routers to check against the local LSDB? A. link-state acknowledgment B. link-state request C. link-state update D. database description

B. The dead interval will now be 60 seconds.

A network engineer has manually configured the hello interval to 15 seconds on an interface of a router that is running OSPFv2. By default, how will the dead interval on the interface be affected? A. The dead interval will now be 30 seconds. B. The dead interval will now be 60 seconds. C. The dead interval will not change from the default value. D. The dead interval will now be 15 seconds.

B. the OSPF process ID on R1

A network technician issues the following commands when configuring a router:R1(config)# router ospf 11R1(config-router)# network 10.10.10.0 0.0.0.255 area 0What does the number 11 represent? A. the cost of the link to R1 B. the OSPF process ID on R1 C. the autonomous system number to which R1 belongs D. the administrative distance that is manually assigned to R1 E. the area number where R1 is located

B. HQ# clear ip ospf process

After modifying the router ID on an OSPF router, what is the preferred method to make the new router ID effective? A. HQ# resume B. HQ# clear ip ospf process C. HQ# copy running-config startup-config D. HQ# clear ip route *

C. 0.0.0.63

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 128.107.0.0 255.255.255.192. What wildcard mask would the administrator use in the OSPF network statement? A. 0.0.0.31 B. 0.0.0.15 C. 0.0.0.63 D. 0.0.0.7

D. when the routers are interconnected over a common Ethernet network

In an OSPF network when are DR and BDR elections required? A. when the two adjacent neighbors are in two different networks B. when all the routers in an OSPF area cannot form adjacencies C. when the two adjacent neighbors are interconnected over a point-to-point link D. when the routers are interconnected over a common Ethernet network

C. Interface Fa0/0 has not been activated for OSPFv2 on router R2.

Refer to the exhibit. A network administrator has configured OSPFv2 on the two Cisco routers but PC1 is unable to connect to PC2. What is the most likely problem? A. Interface S0/0 is configured as a passive-interface on router R2. B. Interface Fa0/0 is configured as a passive-interface on router R2. C. Interface Fa0/0 has not been activated for OSPFv2 on router R2. D. Interface s0/0 has not been activated for OSPFv2 on router R2.

C. The R1 dead timer expires between hello packets from R2.

Refer to the exhibit. A network administrator has configured the OSPF timers to the values that are shown in the graphic. What is the result of having those manually configured timers? A. The neighbor adjacency has formed. B. R1 automatically adjusts its own timers to match the R2 timers. C. The R1 dead timer expires between hello packets from R2. D. The hello timer on R2 expires every ten seconds.

A. Router R4 will become the DR and router R1 will become the BDR.

Refer to the exhibit. If the switch reboots and all routers have to re-establish OSPF adjacencies, which routers will become the new DR and BDR? A. Router R4 will become the DR and router R1 will become the BDR. B. Router R2 will become the DR and router R3 will become the BDR. C. Router R1 will become the DR and router R2 will become the BDR. D. Router R4 will become the DR and router R3 will become the BDR.

D. The R4 router ID is 172.16.1.1., E. R3 will be elected BDR., & F. R2 will be elected DR.

Refer to the exhibit. Which three statements describe the results of the OSPF election process of the topology that is shown in the exhibit? (Choose three.) A. R1 will be elected BDR. B. The R4 FastEthernet 0/0 priority is 128. C. The router ID on R2 is the loopback interface. D. The R4 router ID is 172.16.1.1. E. R3 will be elected BDR. F. R2 will be elected DR.

A. to facilitate router participation in the election of the designated router & C. to uniquely identify the router within the OSPF domain

What are the two purposes of an OSPF router ID? (Choose two.) A. to facilitate router participation in the election of the designated router B. to enable the SPF algorithm to determine the lowest cost path to remote networks C. to uniquely identify the router within the OSPF domain D. to facilitate the transition of the OSPF neighbor state to Full E. to facilitate the establishment of network convergence

D. if the router no longer receives hello packets

What indicates to a link-state router that a neighbor is unreachable? A. if the router receives an LSP with previously learned information B. if the router receives an update with a hop count of 16 C. if the router no longer receives routing updates D. if the router no longer receives hello packets

D. Topology changes in one area do not cause SPF recalculations in other areas.

What is a benefit of multiarea OSPF routing? A. Automatic route summarization occurs by default between areas. B. Routers in all areas share the same link-state database and have a complete picture of the entire network. C. A backbone area is not required. D. Topology changes in one area do not cause SPF recalculations in other areas.

A. a 32-bit number formatted like an IPv4 address

What is the format of the router ID on an OSPF-enabled router? A. a 32-bit number formatted like an IPv4 address B. a character string with no space C. a unique router host name that is configured on the router C. an 8-bit number with a decimal value between 0 and 255 D. a unique phrase with no more than 16 characters

D. to more accurately reflect the cost of links greater than 100 Mb/s

What is the reason for a network engineer to alter the default reference bandwidth parameter when configuring OSPF? A. to force that specific link to be used in the destination route B. to increase the speed of the link C. to enable the link for OSPF routing D. to more accurately reflect the cost of links greater than 100 Mb/s

D. Configure a value using the router-id command.

What is the recommended Cisco best practice for configuring an OSPF-enabled router so that each router can be easily identified when troubleshooting routing issues? A. Use a loopback interface configured with the highest IP address on the router. B. Use the highest active interface IP address that is configured on the router. C. Use the highest IP address assigned to an active interface participating in the routing process. D. Configure a value using the router-id command.

B. any IP address that is configured using the router-id command

What will an OSPF router prefer to use first as a router ID? A. the highest active interface that participates in the routing process because of a specifically configured network statement B. any IP address that is configured using the router-id command C. a loopback interface that is configured with the highest IP address on the router D. the highest active interface IP that is configured on the router

D. executing the SPF algorithm

Which step in the link-state routing process is described by a router running an algorithm to determine the best path to each destination? A. choosing the best route B. declaring a neighbor to be inaccessible C. load balancing equal-cost paths D. executing the SPF algorithm