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CCNA 3 v7 Modules 1 - 2 - OSPF Concepts and Configuration Exam Answers
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CCNA 3 v7 Modules 1 - 2_ OSPF Concepts and Configuration Exam Answers
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//itexamanswers.net/ccna-3-v7-modules-1-2-ospf-concepts-and-configuration-exam-answers.html
Terms in this set (20)
What is a function of OSPF hello packets?
to discover neighbors and build adjacencies between them
Which OPSF packet contains the different types of link-state advertisements?
LSU
Which three statements describe features of the OSPF topology table? (Choose three.)
1)It is a link-state database that represents the network topology. 2)When converged, all routers in an area have identical topology tables.3)The table can be viewed via the show ip ospf database command.
What does an OSPF area contain?
routers that have the same link-state information in their LSDBs
What is used to facilitate hierarchical routing in OSPF?
the use of multiple areas
Which OSPF data structure is identical on all OSPF routers that share the same area?
link-state database
Which step does an OSPF-enabled router take immediately after establishing an adjacency with another router?
exchanges link-state advertisements
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 now be 60 seconds.
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?
The R1 dead timer expires between hello packets from R2.
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 and hello interval
What is the default router priority value for all Cisco OSPF routers?
1
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
In an OSPF network when are DR and BDR elections required?
when the routers are interconnected over a common Ethernet network
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 30 minutes
What will an OSPF router prefer to use first as a router ID?
any IP address that is configured using the router-id command
What are the two purposes of an OSPF router ID? (Choose two.)
A)to uniquely identify the router within the OSPF domain.B)to facilitate router participation in the election of the designated router.
Refer to the exhibit. If no router ID was manually configured, what would router Branch2 use as its OSPF router ID?
192.168.1.100
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
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 172.16.1.0 255.255.255.0 area 0
By default, what is the OSPF cost for any link with a bandwidth of 100 Mb/s or greater?
1
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