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单选题
How is the cost of a virtual link in OSPF calculated?（）
A
Takes the metric of the outgoing interface.
B
Uses the metric that is assigned during configuration.
C
Uses the path metric to reach the virtual link neighbor.
D
Uses a default of zero unless otherwise specified.
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更多 “单选题How is the cost of a virtual link in OSPF calculated?（）A Takes the metric of the outgoing interface.B Uses the metric that is assigned during configuration.C Uses the path metric to reach the virtual link neighbor.D Uses a default of zero unless otherwise specified.” 相关考题
考题
OSPF is a link-state routing protocol。It is designed to be run internal to a single __（71__system。Each OSPF router maintains an identical __（72）__ describing the autonomous system’s topology。From this database，a routing table is calculated by constructing a shortest-path __（73）__。OSPF recalculates routes quickly in the face of topological changes，utilizing a minimum of routing __（74）__ traffic。OSPF provides support for equal-cost multipath。An area routing capability is provided，enabling an additional level of routing protection and a reduction in routing protocol __（75）__。A.autonomousB.networkC.computerD.server
考题
How is the cost of a virtual link in OSPF calculated?()
A. Takes the metric of the outgoing interface.B. Uses the metric that is assigned during configuration.C. Uses the path metric to reach the virtual link neighbor.D. Uses a default of zero unless otherwise specified.
考题
You are running OSPF between two ERX Edge Routers across an OC－12c link with HDLC encapsulation.How many designated routers are present for this link?()
A.0B.1C.2D.3
考题
By default, how often does an ERX Edge Router send an OSPF link－state advertisement in a stable network?()
A.AB.BC.CD.D
考题
OSPF is a link-state routing protocol。It is designed to be run internal to a single __（71）__system。Each OSPF router maintains an identical __（72）__ describing the autonomous system’s topology。From this database，a routing table is calculated by constructing a shortest-path __（73）__。OSPF recalculates routes quickly in the face of topological changes，utilizing a minimum of routing __（74）__ traffic。OSPF provides support for equal-cost multipath。An area routing capability is provided，enabling an additional level of routing protection and a reduction in routing protocol__（75）__。71A.autonomousB.networkC.computerD.server
考题
An OSPF interface has been configured with the bandwidth 64 command. What will be the calculated OSPF cost of this link?()
A.1B.10C.1562D.64000E.128000
考题
When verifying OSPF virtual link problems, which is an important item to check on the two transit OSPF routers?()
A. OSPF process IDB. OSPF router IDC. OSPF network typeD. OSPF memory usageE. OSPF CPU utilizationF. OSPF stub area configurations
考题
If the bandwidth of an OSPF interface is 64, what would be the calculated cost of the link?()
A. 1B. 10C. 1562D. 64000E. 128000F. None of the above
考题
Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router?()
A. A virtual link to area 0.B. OSPF summarization command.C. default - cost extension to the area command.D. no - summary extension to the area stub comm and.E. None of the other alternatives apply
考题
Refer to the exhibit. During the process of configuring a virtual link to connect area 2 with the backbone area, the network administrator received this console message on R3:*Mar 1 00:2 5:01.084: %OSPF -4- ERRRCV: Received invalid packet: mismatch area ID, from backbone area must be virtual link but not found from 20.20.20.1, Serial 0 .How should the virtual link be configured on the OSPF routers to establish full connectivity between the areas?（）A.R1(config - router)# area 0 virtual - link 1.1.1.1R3(config - router)# area 2 virtual - link 3.3.3.3B.R1(config - router)# area 1 virtual - link 2.2.2.2 R3(config - router)# area 1 virtual - link 2.2.2.2C.R1(config - router)# area 1 virtual - link 20.20 .20.2 R3(config - router)# area 1 virtual - link 30.30.30.2D.R1(config - router)# area 1 virtual - link 30.30.30.3 R3(config - router)# area 1 virtual - link 20.20.20.1E.R1(config - router)# area 1 virtual - link 3.3.3.3 R3(config - router)# area 1 virtual - link 1.1 .1.1
考题
Open Shortest Path First (OSPF) was designed as an （ ） gateway protocol, for use in an autonomous system such as a local area network (LAN). It implements Dijkstra's algorithm, also known as the （ ） path first algorithm. As a link-state routing protocol it was based on the link-state algorithm developed for the ARPANET in 1980 and the IS-IS routing protocol. OSPF was first standardised in 1989 as RFC 1131, which is now known as OSPF version 1.Routing protocols like OSPF calculate the shortest route to a destination through the network based on an algorithm. The first routing protocol that was widely implemented, the （请作答此空）, calculated the shortest route based on hops, that is the number of routers that an IP packet had to traverse to reach the destination host. RIP successfully implemented dynamic routing, where routing tables change if the network topology changes. But RIP did not adapt its routing according to changing network conditions, such as data-transfer rate. Demand grew for a dynamic routing protocol that could calculate the fastest route to a destination. （ ） was developed so that the shortest path through a network was calculated based on the cost of the route, taking into account bandwidth, delay and load. Therefore OSPF undertakes route cost calculation on the basis of link-cost parameters, which can be weighted by the administrator. OSPF was quickly adopted because it became known for reliably calculating routes through large and complex local area networks.As a link state routing protocol, OSPF maintains link state （ ）, which are really network topology maps, on every router on which it is implemented. The state of a given route in the network is the cost, and OSPF algorithm allows every router to calculate the cost of the routes to any given reachable destination. Unless the administrator has made a configuration, the link cost of a path connected to a router is determined by the bit rate (1 Gbit/s, 10 Gbit/s, etc) of the interface. A router interface with OSPF will then advertise its link cost to neighbouring routers through multicast, known as the hello procedure. All routers with OSPF implementation keep sending hello packets, and thus changes in the cost of their links become known to neighbouring routers. The information about the cost of a link, that is the speed of a point to point connection between two routers, is then cascaded through the network because OSPF routers advertise the information they receive from one neighbouring router to all other neighbouring routers. This process of flooding link state information through the network is known as synchronisation. Based on this information, all routers with OSPF implementation continuously update their link state databases with information about the network topology and adjust their routing tables.OSPF has become a popular dynamic routing protocol. Other commonly used dynamic routing protocols are the RIP and the Border Gateway Protocol (BGP). Today routers support at least one interior gateway protocol to advertise their routing tables within a local area network. Frequently implemented interior gateway protocols besides OSPF are RIP, IS-IS, and the proprietary Interior Gateway Routing Protocol (IGRP) by Cisco.A.OSPF
B.RIP
C.IS-IS
D.EIGRP
考题
Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）A、A virtual link to area 0.B、OSPF summarization command.C、default - cost extension to the area command.D、no - summary extension to the area stub comm and.E、None of the other alternatives apply
考题
When verifying OSPF virtual link problems, which is an important item to check on the two transit OSPF routers?（）A、OSPF process IDB、OSPF router IDC、OSPF network typeD、OSPF memory usageE、OSPF CPU utilizationF、OSPF stub area configurations
考题
If the bandwidth of an OSPF interface is 64, what would be the calculated cost of the link?（）A、1B、10C、1562D、64000E、128000F、None of the above
考题
How is the cost of a virtual link in OSFP calculated？（）A、Takes the metric of the outgoing interface.B、Uses the metric that is assigned during configuration.C、Uses the path metric to reach the virtual neighbor.D、Uses a default of zero unless otherwise specified.
考题
下面哪种网络类型OSPF所有报文是以单播方式发送的。（）A、Point-to-PointB、Point-to-MultiPointC、BroadcastD、NBMAE、Virtual Link
考题
An OSPF interface has been configured with the bandwidth 64 command. What will be the calculated OSPF cost of this link?（）A、1B、10C、1562D、64000E、128000
考题
Network A has a spanning-tree problem in which the traffic is selecting a longer path. How is the path cost calculated？（）A、number of hopsB、priority of the bridgeC、interface bandwidthD、interface delayE、None of the above
考题
Routers A and B have an OC12c and a GE link between them and are running OSPF over both of these links.Which item is correct， assuming the default JUNOS software OSPF metric calculation？（）A、There are two equal cost paths between A and BB、The GE link is the preferred path between A and BC、The OC12c link is the preferred path between A and BD、Manual metric assignment must be configured to determine the outcome.
考题
Routers A and B have an OC12c and a GE link between them and are running OSPF over both ofthese links. Which statement is correct, assuming the default JUNOS software OSPF metric calculation?（）A、There are two equal cost paths betweena and b.B、Thege link is the preferred path betweena and b.C、The oc12c link is the preferred path betweena and b.D、Manual metric assignment must be configured to determine the outcome
考题
单选题When verifying OSPF virtual link problems, which is an important item to check on the two transit OSPF routers?（）A
OSPF process IDB
OSPF router IDC
OSPF network typeD
OSPF memory usageE
OSPF CPU utilizationF
OSPF stub area configurations
考题
单选题If the bandwidth of an OSPF interface is configured with the "bandwidth 64"command, what would be the calculated cost of the link?（）A
1B
64C
1562D
64000E
1500
考题
单选题Which of the following answers can be verified as true based on the following command output from Router R1?（） R1#show ip ospf virtual - links Virtual Link OSPF_VL0 to router 4.4.4.4 is up Run as demand circuit DoNotAge LSA alloweD. Transit area 1, via interface FastEthernet0/1, Cost of using 3A
R1 is configured with an area 0 virtual - link 4.4.4.4 cost 3 command.B
The ping 4.4.4.4 command on R1 must currently be successful.C
R1's Fa0/0 OSPF cost is 3.D
4.4.4.4 is known to R1 based on a Type 1 LSA in area 1.
考题
单选题Network A has a spanning-tree problem in which the traffic is selecting a longer path. How is the path cost calculated？（）A
number of hopsB
priority of the bridgeC
interface bandwidthD
interface delayE
None of the above
考题
单选题If the bandwidth of an OSPF interface is 64, what would be the calculated cost of the link?（）A
1B
10C
1562D
64000E
128000F
None of the above
考题
单选题Which of the following is an OSPF configuration parameter that is used on an ABR, but not on an internal router？（）A
A virtual link to area 0.B
OSPF summarization command.C
default - cost extension to the area command.D
no - summary extension to the area stub comm and.E
None of the other alternatives apply
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