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WorksheetsModules 1-2
Total questions: 53
Worksheet time: 27mins
Name
Class
Date
1.
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 not change from the default value.
b)
The dead interval will now be 15 seconds.
c)
The dead interval will now be 30 seconds.
d)
The dead interval will now be 60 seconds.
2.
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?
a)
the administrative distance that is manually assigned to R1
b)
the area number where R1 is located
c)
the autonomous system number to which R1 belongs
d)
the cost of the link to R1
e)
the OSPF process ID on R1
3.
After modifying the router ID on an OSPF router, what is the preferred method to make the new router ID effective?
a)
HQ# clear ip ospf process
b)
HQ# clear ip route *
c)
HQ# copy running-config startup-config
d)
HQ# resume
4.
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?
a)
0.0.0.31
b)
0.0.0.63
c)
0.0.0.127
d)
0.0.0.255
5.
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?
a)
0.0.0.63
b)
0.0.0.127
c)
0.0.31.255
d)
0.0.63.255
6.
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?
a)
0.0.0.3
b)
0.0.0.7
c)
0.0.3.255
d)
0.0.63.255
7.
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)
0.0.0.3
b)
0.0.0.7
c)
0.0.0.63
d)
0.0.63.255
8.
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?
a)
0.0.1.255
b)
0.0.15.255
c)
0.0.31.255
d)
0.0.63.255
9.
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?
a)
0.0.1.255
b)
0.0.7.255
c)
0.0.15.255
d)
0.0.31.255
10.
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?
a)
0.0.0.255
b)
0.0.3.255
c)
0.0.31.255
d)
0.0.63.255
11.
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?
a)
router(config-router)# network 172.16.0.0 0.0.15.255 area 0
b)
router(config-router)# network 172.16.1.0 0.0.0.0 area 0
c)
router(config-router)# network 172.16.1.0 0.0.255.255 area 0
d)
router(config-router)# network 172.16.1.0 255.255.255.0 area 0
12.
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 172.16.0.0 0.0.15.255 area 0
b)
router(config-router)# network 172.16.1.0 0.0.0.0 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 0.0.255.255 area 0
13.
By default, what is the OSPF cost for any link with a bandwidth of 100 Mb/s or greater?
a)
1
b)
100
c)
10000
d)
100000000
14.
In an OSPF network when are DR and BDR elections required?
a)
when all the routers in an OSPF area cannot form adjacencies
b)
when the routers are interconnected over a common Ethernet network
c)
when the two adjacent neighbors are in two different networks
d)
when the two adjacent neighbors are interconnected over a point-to-point link
15.
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 allows all 192.168.1.0 networks to be advertised.
b)
It changes the router ID of the router to 192.168.1.1.
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.
16.
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)
Add the network 10.0.1.0 0.0.0.255 area 0 command to the OSPF process.
b)
Change the subnet mask of interface FastEthernet 0/0 to 255.255.255.0.
c)
Issue the clear ip ospf process command.
d)
Remove the passive interface command from interface FastEthernet 0/0.
17.
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 Fa0/0 has not been activated for OSPFv2 on router R2.
b)
Interface Fa0/0 is configured as a passive-interface on router R2.
c)
Interface s0/0 has not been activated for OSPFv2 on router R2.
d)
Interface S0/0 is configured as a passive-interface on router R2.
18.
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)
R1 automatically adjusts its own timers to match the R2 timers.
b)
The hello timer on R2 expires every ten seconds.
c)
The neighbor adjacency has formed.
d)
The R1 dead timer expires between hello packets from R2.
19.
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
20.
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 R1 will become the DR and router R2 will become the BDR.
b)
Router R2 will become the DR and router R3 will become the BDR.
c)
Router R4 will become the DR and router R1 will become the BDR.
d)
Router R4 will become the DR and router R3 will become the BDR.
21.
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
b)
ISP and R0-A
c)
ISP, R0-A, R0-B, and R0-C
d)
R0-A
e)
R0-A, R0-B, and R0-C
22.
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?
a)
If a new router with a higher priority is added to this network, it will become the DR.
b)
If the DR fails, the new DR will be router B.
c)
If the priority of router C is changed to 255, then it will become the DR.
d)
Router A will become the DR and router D will become the BDR.
23.
Refer to the exhibit. What is the OSPF cost to reach the router A LAN 172.16.1.0/24 from B?
a)
65
b)
74
c)
128
d)
782
24.
Refer to the exhibit. Which command did an administrator issue to produce this output?
a)
R1# show ip ospf
b)
R1# show ip ospf interface serial0/0/1
c)
R1# show ip ospf neighbor
d)
R1# show ip route ospf
25.
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)
R2 will be elected DR.
c)
R3 will be elected BDR.
d)
The R4 FastEthernet 0/0 priority is 128.
e)
The R4 router ID is 172.16.1.1.
26.
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.)
a)
dead interval
b)
hello interval
c)
list of neighbors
d)
router ID
e)
router priority
27.
What are the two purposes of an OSPF router ID? (Choose two.)
a)
to enable the SPF algorithm to determine the lowest cost path to remote networks
b)
to facilitate router participation in the election of the designated router
c)
to facilitate the establishment of network convergence
d)
to facilitate the transition of the OSPF neighbor state to Full
e)
to uniquely identify the router within the OSPF domain
28.
What command would be used to determine if a routing protocol-initiated relationship had been made with an adjacent router?
a)
ping
b)
show ip interface brief
c)
show ip ospf neighbor
d)
show ip protocols
29.
What does an OSPF area contain?
a)
routers that have the same link-state information in their LSDBs
b)
routers that share the same process ID
c)
routers that share the same router ID
d)
routers whose SPF trees are identical
30.
What indicates to a link-state router that a neighbor is unreachable?
a)
if the router no longer receives hello packets
b)
if the router no longer receives routing updates
c)
if the router receives an LSP with previously learned information
d)
if the router receives an update with a hop count of 16
31.
What is a benefit of multiarea OSPF routing?
a)
A backbone area is not required.
b)
Automatic route summarization occurs by default between areas.
c)
Routers in all areas share the same link-state database and have a complete picture of the entire network.
d)
Topology changes in one area do not cause SPF recalculations in other areas.
32.
What is a function of OSPF hello packets?
a)
to discover neighbors and build adjacencies between them
b)
to ensure database synchronization between routers
c)
to request specific link-state records from neighbor routers
d)
to send specifically requested link-state records
33.
What is the default router priority value for all Cisco OSPF routers?
a)
0
b)
1
c)
10
d)
255
34.
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 phrase with no more than 16 characters
d)
a unique router host name that is configured on the router
e)
an 8-bit number with a decimal value between 0 and 255
35.
What is the reason for a network engineer to alter the default reference bandwidth parameter when configuring OSPF?
a)
to enable the link for OSPF routing
b)
to force that specific link to be used in the destination route
c)
to increase the speed of the link
d)
to more accurately reflect the cost of links greater than 100 Mb/s
36.
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)
Configure a value using the router-id command.
b)
Use a loopback interface configured with the highest IP address on the router.
c)
Use the highest active interface IP address that is configured on the router.
d)
Use the highest IP address assigned to an active interface participating in the routing process.
37.
What is used to facilitate hierarchical routing in OSPF?
a)
autosummarization
b)
frequent SPF calculations
c)
the election of designated routers
d)
the use of multiple areas
38.
What type of address is 64.101.198.197?
a)
private
b)
public
39.
What will an OSPF router prefer to use first as a router ID?
a)
a loopback interface that is configured with the highest IP address on the router
b)
any IP address that is configured using the router-id command
c)
the highest active interface IP that is configured on the router
d)
the highest active interface that participates in the routing process because of a specifically configured network statement
40.
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
41.
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 ospf interface
c)
show ip protocols
d)
show ip route ospf
42.
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 interface fastethernet 0/1
b)
show ip ospf interface serial 0/0/0
c)
show ip ospf neighbor
d)
show ipv6 ospf interface serial 0/0/0
43.
Which OPSF packet contains the different types of link-state advertisements?
a)
DBD
b)
hello
c)
LSAck
d)
LSR
e)
LSU
44.
Which OSPF data structure is identical on all OSPF routers that share the same area?
a)
adjacency database
b)
forwarding database
c)
link-state database
d)
routing table
45.
Which step does an OSPF-enabled router take immediately after establishing an adjacency with another router?
a)
builds the topology table
b)
chooses the best path
c)
exchanges link-state advertisements
d)
executes the SPF algorithm
46.
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)
executing the SPF algorithm
d)
load balancing equal-cost paths
47.
Which step in the link-state routing process is described by a router flooding link-state and cost information about each directly connected link?
a)
building the topology table
b)
exchanging link-state advertisements
c)
injecting the default route
d)
selecting the router ID
48.
Which step in the link-state routing process is described by a router sending Hello packets out all of the OSPF-enabled interfaces?
a)
electing the designated router
b)
establishing neighbor adjacencies
c)
exchanging link-state advertisements
d)
injecting the default route
49.
Which step in the link-state routing process is described by a router inserting best paths into the routing table?
a)
choosing the best route
b)
declaring a neighbor to be inaccessible
c)
executing the SPF algorithm
d)
load balancing equal-cost paths
50.
Which step in the link-state routing process is described by a router building a link-state database based on received LSAs?
a)
building the topology table
b)
declaring a neighbor to be inaccessible
c)
executing the SPF algorithm
d)
selecting the router ID
51.
Which three OSPF states are involved when two routers are forming an adjacency? (Choose three.)
a)
Down
b)
Init
c)
Two-Way
d)
ExStart
e)
Exchange
52.
Which three statements describe features of the OSPF topology table? (Choose three.)
a)
It is a link-state database that represents the network topology.
b)
Its contents are the result of running the SPF algorithm.
c)
The table can be viewed via the show ip ospf database command.
d)
The topology table contains feasible successor routes.
e)
When converged, all routers in an area have identical topology tables.
53.
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)
database description
b)
link-state acknowledgment
c)
link-state request
d)
link-state update
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