Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Enterprise Networking > Module 1-2 Exam > Flashcards

Module 1-2 Exam Flashcards

1
Q

What is a function of OSPF hello packets?

to send specifically requested link-state records

to discover neighbors and build adjacencies between them

to ensure database synchronization between routers

to request specific link-state records from neighbor routers

A

to discover neighbors and build adjacencies between them

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which OPSF packet contains the different types of link-state advertisements?

hello

DBD

LSR

LSU

LSAck

A

LSU

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Which three statements describe features of the OSPF topology table? (Choose three.)

It is a link-state database that represents the network topology.

Its contents are the result of running the SPF algorithm.

When converged, all routers in an area have identical topology tables.

The topology table contains feasible successor routes.

The table can be viewed via the show ip ospf database command.

After convergence, the table only contains the lowest cost route entries for all known networks.

A

It is a link-state database that represents the network topology.

When converged, all routers in an area have identical topology tables.

The table can be viewed via the show ip ospf database command.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What does an OSPF area contain?

routers that share the same router ID

routers whose SPF trees are identical

routers that have the same link-state information in their LSDBs

routers that share the same process ID

A

routers that have the same link-state information in their LSDBs

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is used to facilitate hierarchical routing in OSPF?

the use of multiple areas

frequent SPF calculations

autosummarization

the election of designated routers

A

the use of multiple areas

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Which OSPF data structure is identical on all OSPF routers that share the same area?

forwarding database

link-state database

adjacency database

routing table

A

link-state database

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Which step does an OSPF-enabled router take immediately after establishing an adjacency with another router?

builds the topology table

exchanges link-state advertisements

chooses the best path

executes the SPF algorithm

A

exchanges link-state advertisements

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

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?

The dead interval will not change from the default value.

The dead interval will now be 30 seconds.

The dead interval will now be 60 seconds.

The dead interval will now be 15 seconds.

A

The dead interval will now be 60 seconds.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

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?

https://itexamanswers.net/wp-content/uploads/2020/05/i212851v1n1_212851.png

R1 automatically adjusts its own timers to match the R2 timers.

The R1 dead timer expires between hello packets from R2.

The hello timer on R2 expires every ten seconds.

The neighbor adjacency has formed.

A

The R1 dead timer expires between hello packets from R2.

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

To establish a neighbor adjacency two OSPF routers will exchange hello packets. Which two values in the hello packets must match on both routers? (Choose two.)

dead interval

router priority

list of neighbors

router ID

hello interval

A

dead interval

hello interval

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What is the default router priority value for all Cisco OSPF routers?

0

1

10

255

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

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?

database description

link-state update

link-state request

link-state acknowledgment

A

database description

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

In an OSPF network when are DR and BDR elections required?

when the two adjacent neighbors are interconnected over a point-to-point link

when all the routers in an OSPF area cannot form adjacencies

when the routers are interconnected over a common Ethernet network

when the two adjacent neighbors are in two different networks

A

when the routers are interconnected over a common Ethernet network

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

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?

every 5 minutes

every 10 minutes

every 30 minutes

every 60 minutes

A

every 30 minutes

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What will an OSPF router prefer to use first as a router ID?

a loopback interface that is configured with the highest IP address on the router

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

the highest active interface IP that is configured on the router

the highest active interface that participates in the routing process because of a specifically configured network statement

A

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

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

What are the two purposes of an OSPF router ID? (Choose two.)

to uniquely identify the router within the OSPF domain

to facilitate router participation in the election of the designated router

to enable the SPF algorithm to determine the lowest cost path to remote networks

to facilitate the establishment of network convergence

to facilitate the transition of the OSPF neighbor state to Full

A

to uniquely identify the router within the OSPF domain

to facilitate router participation in the election of the designated router

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Refer to the exhibit. If no router ID was manually configured, what would router Branch1 use as its OSPF router ID?

https: //itexamanswers.net/wp-content/uploads/2019/12/i254793v1n2_254793.gif
10. 0.0.1
10. 1.0.1
192. 168.1.100
209. 165.201.1

A

192.168.1.100

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

A network technician issues the following commands when configuring a router:

R1(config)# router ospf 11
R1(config-router)# network 10.10.10.0 0.0.0.255 area 0
What does the number 11 represent?

the OSPF process ID on R1

the cost of the link to R1

the autonomous system number to which R1 belongs

the administrative distance that is manually assigned to R1

the area number where R1 is located

A

the OSPF process ID on R1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

An OSPF router has three directly connected networks; 172.16.0.0/16, 172.16.1.0/16, and 172.16.2.0/16. Which OSPF network command would advertise only the 172.16.1.0 network to neighbors?

router(config-router)# network 172.16.1.0 0.0.255.255 area 0

router(config-router)# network 172.16.0.0 0.0.15.255 area 0

router(config-router)# network 172.16.1.0 255.255.255.0 area 0

router(config-router)# network 172.16.1.0 0.0.0.0 area 0

A

router(config-router)# network 172.16.1.0 255.255.255.0 area 0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

By default, what is the OSPF cost for any link with a bandwidth of 100 Mb/s or greater?

100000000

10000

1

100

A

1

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Refer to the exhibit. What is the OSPF cost to reach the router A LAN 172.16.1.0/24 from B?

https://itexamanswers.net/wp-content/uploads/2019/12/i258065v1n1_Item-isomorph-258065.png

782

74

128

65

A

65

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

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?

https://itexamanswers.net/wp-content/uploads/2019/12/i269030v1n1_ScalNch5.png

R0-A

ISP, R0-A, R0-B, and R0-C

ISP

R0-B and R0-C

ISP and R0-A

R0-A, R0-B, and R0-C

A

R0-A

23
Q

What command would be used to determine if a routing protocol-initiated relationship had been made with an adjacent router?

ping

show ip ospf neighbor

show ip interface brief

show ip protocols

A

show ip ospf neighbor

24
Q

Refer to the exhibit. Which command did an administrator issue to produce this output?

https://itexamanswers.net/wp-content/uploads/2019/12/i278236v1n1_212843.jpg

R1# show ip ospf interface serial0/0/1

R1# show ip route ospf

R1# show ip ospf

R1# show ip ospf neighbor

A

R1# show ip ospf interface serial0/0/1

25
Q

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?​

show ip interface brief

show ip ospf interface

show ip protocols

show ip route ospf

A

show ip protocols

26
Q

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?

https://itexamanswers.net/wp-content/uploads/2019/12/i285134v1n1_285134.png

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

Interface Fa0/0 is configured as a passive-interface on router R2.

Interface S0/0 is configured as a passive-interface on router R2.

Interface s0/0 has not been activated for OSPFv2 on router R2.

A

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

27
Q

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?

Configure a value using the router-id command.

Use the highest active interface IP address that is configured on the router.

Use a loopback interface configured with the highest IP address on the router.

Use the highest IP address assigned to an active interface participating in the routing process.

A

Configure a value using the router-id command.

28
Q

Which step in the link-state routing process is described by a router running an algorithm to determine the best path to each destination?

load balancing equal-cost paths

declaring a neighbor to be inaccessible

choosing the best route

executing the SPF algorithm

A

executing the SPF algorithm

29
Q

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 192.168.223.0 255.255.254.0. What wildcard mask would the administrator use in the OSPF network statement?

  1. 0.1.255
  2. 0.7.255
  3. 0.15.255
  4. 0.31.255
A

0.0.1.255

30
Q

What is the format of the router ID on an OSPF-enabled router?

a unique router host name that is configured on the router

a unique phrase with no more than 16 characters

a 32-bit number formatted like an IPv4 address

an 8-bit number with a decimal value between 0 and 255

a character string with no space

A

a 32-bit number formatted like an IPv4 address

31
Q

Question as presented:

DUAL is the algorithm used by EIGRP. In multiarea OSPF, OSPF is implemented using multiple areas, and all of them must be connected to the backbone area.

A

Question as presented:

DUAL is the algorithm used by EIGRP. In multiarea OSPF, OSPF is implemented using multiple areas, and all of them must be connected to the backbone area.

32
Q

After modifying the router ID on an OSPF router, what is the preferred method to make the new router ID effective?

HQ# copy running-config startup-config

HQ# resume

HQ# clear ip route

HQ# clear ip ospf process

A

HQ# clear ip ospf process

33
Q

In an OSPFv2 configuration, what is the effect of entering the command network 192.168.1.1 0.0.0.0 area 0 ?

It allows all 192.168.1.0 networks to be advertised.

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

It changes the router ID of the router to 192.168.1.1.

It enables OSPF on all interfaces on the router.

A

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

34
Q

What is the reason for a network engineer to alter the default reference bandwidth parameter when configuring OSPF?

to force that specific link to be used in the destination route

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

to enable the link for OSPF routing

to increase the speed of the link

A

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

35
Q

PT ACTIVITY

Which task has to be performed on Router 1 for it to establish an OSPF adjacency with Router 2?

Issue the clear ip ospf process command.

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

Remove the passive interface command from interface FastEthernet 0/0.

Add the network 10.0.1.0 0.0.0.255 area 0 command to the OSPF process.

A

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

36
Q

Match the description to the term. (Not all options are used.)

A

https://itexamanswers.net/wp-content/uploads/2019/12/2020-01-21_004110.jpg

37
Q

What is a benefit of multiarea OSPF routing?

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

Routers in all areas share the same link-state database and have a complete picture of the entire network.

A backbone area is not required.

Automatic route summarization occurs by default between areas.

A

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

38
Q

Match the OSPF state with the order in which it occurs. (Not all options are used.)

A

https://itexamanswers.net/wp-content/uploads/2019/12/2020-01-24_212704.jpg

39
Q

What indicates to a link-state router that a neighbor is unreachable?

if the router no longer receives hello packets

if the router receives an update with a hop count of 16

if the router receives an LSP with previously learned information

if the router no longer receives routing updates

A

if the router no longer receives hello packets

40
Q

Which three OSPF states are involved when two routers are forming an adjacency? (Choose three.)

Exchange

Init

ExStart

Two-way

Loading

Down

A

Init

Two-way

Down

41
Q

Refer to the exhibit. Suppose that routers B, C, and D have a default priority, and router A has a priority 0. Which conclusion can be drawn from the DR/BDR election process?​

https://itexamanswers.net/wp-content/uploads/2019/12/i247460v1n3_Item-247460.png

If the priority of router C is changed to 255, then it will become the DR.

Router A will become the DR and router D will become the BDR.​

If the DR fails, the new DR will be router B.

If a new router with a higher priority is added to this network, it will become the DR.

A

If the DR fails, the new DR will be router B.

42
Q

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 64.102.0.0 255.255.255.128. What wildcard mask would the administrator use in the OSPF network statement?

  1. 0.31.255
  2. 0.0.63
  3. 0.63.255
  4. 0.0.127
A

0.0.0.127

43
Q

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?

show ipv6 ospf interface serial 0/0/0

show ip ospf neighbor

show ip ospf interface fastethernet 0/1

show ip ospf interface serial 0/0/0

A

show ip ospf interface serial 0/0/0

44
Q

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?

  1. 0.63.255
  2. 0.0.63
  3. 0.0.3
  4. 0.0.7
A

0.0.0.63

45
Q

Match each OSPF packet type to how it is used by a router. (Not all options are used.)

A

https://itexamanswers.net/wp-content/uploads/2019/12/jsq8FrG.png

46
Q

Which step in the link-state routing process is described by a router building a link-state database based on received LSAs?

selecting the router ID

declaring a neighbor to be inaccessible

executing the SPF algorithm

building the topology table

A

building the topology table

47
Q

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 192.168.181.0 255.255.254.0. What wildcard mask would the administrator use in the OSPF network statement?

.0.63.255

  1. 0.15.255
  2. 0.1.255
  3. 0.31.255
A

0.0.1.255

48
Q

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 198.19.0.0 255.255.252.0. What wildcard mask would the administrator use in the OSPF network statement?

  1. 0.63.255
  2. 0.3.255
  3. 0.31.255
  4. 0.0.255
A

0.0.3.255

49
Q

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 128.107.0.0 255.255.252.0. What wildcard mask would the administrator use in the OSPF network statement?

  1. 0.3.255
  2. 0.0.7
  3. 0.0.3
  4. 0.63.255
A

0.0.3.255

50
Q

Which step in the link-state routing process is described by a router flooding link-state and cost information about each directly connected link?

building the topology table

selecting the router ID

exchanging link-state advertisements

injecting the default route

A

exchanging link-state advertisements

51
Q

Which step in the link-state routing process is described by a router sending Hello packets out all of the OSPF-enabled interfaces?

electing the designated router

establishing neighbor adjacencies

injecting the default route

exchanging link-state advertisements

A

establishing neighbor adjacencies

52
Q

An administrator is configuring single-area OSPF on a router. One of the networks that must be advertised is 64.100.0.0 255.255.255.0. What wildcard mask would the administrator use in the OSPF network statement?

  1. 0.0.31
  2. 0.0.255
  3. 0.0.63
  4. 0.0.127
A

0.0.0.255

53
Q

Which step in the link-state routing process is described by a router inserting best paths into the routing table?

declaring a neighbor to be inaccessible

executing the SPF algorithm

load balancing equal-cost paths

choosing the best route

A

choosing the best route

54
Q

What type of address is 64.101.198.197?

public

private

A

public

Enterprise Networking (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions