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Open Shortes t Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF).Which two statements best describe the OSPF link - stat

题目

Open Shortes t Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF).Which two statements best describe the OSPF link - state routing pro tocol?（）

A. OSPF sends updates every 10 seconds

B. OSPF sends triggered updates when a network change occurs

C. When a link state is changed, the router that detected the change creates a link - state advertisement (LSA) and propagates it to all OSPF devices using the 224.0.0.6 multicast address

D. OSPF sends summaries of individual link- state entries every 30 minutes to ensure LSDB synchronization

相似考题

1.根据下面的文字资料回答 71～75 题 n the following essay，each blank has four choices．Choose the most suitable one from the four choices and write down in the answer sheet．Open Shortest Path First(OSPF)is a（ 1 ）routing algorithm that（ 2 ）work done on the OSI IS-IS intradomain routing protocol．This routing，as compared to distance-vector routing，requires（ 3 ）processing power．The Dijkstra algorithm is used to calculate（ 4 ）OSPF routing table updates only take place when necessary，（ 5 ）at regular intervals．第6题：文中（ 1 ）处正确的答案是（ ）。A．distance-vectorB．link-stateC．flow-basedD．selective flooding

2.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

3.Which command allows viewing of only OSPF routes?()A.show ip ospf routeB.show ip route protocol ospfC.show route protocol ospfD.show ospf table

4.TCP/IP is a communication protocol, which provides many different networking services. The TCP/IP Internet protocol suite is formed from two standards: the TCP （Transmission Control Protocol） and the IP（Internet Protocol）.（72） means it is on the transport layer.A.ISOB.IPC.OSID.TCP

更多“Open Shortes t Path First (OSPF) is a routing protocol developed for Internet Protocol (IP ”相关问题

  • 第1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）__。

    71

    A.autonomous

    B.network

    C.computer

    D.server


    正确答案：A
    OSPF是一种链路状态路由协议。该协议被设计成运行在单一的自治系统内部。每一个OFPF路由器都保持了同样的数据库，该数据库可以描述自治系统的拓扑图。通过该数据库，可以搭建的最短路径树以此计算路由表。OSPF在拓扑发生变化时，利用最小路由组播流量的快速重新计算路由。OSPF支持多条等价路径。OSPF提供区域路由的能力，在路由协议流量中赋予一个额外的路由保护和路由剪截能力。

  • 第2题：

    A routing protocol is required that supports:1)routing update authentication2)an addressing scheme that conserves IP addresses3)multiple vendors4)a network with over 50 routers Which routing protocol fulfills these requirements（）。

    A.RIPv1

    B.RIPv2

    C.EIGRP

    D.OSPF


    参考答案：D

  • 第3题：

    Open Shortest Path First (OSPF) was designed as an （请作答此空） 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 （ ）, 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.exterior
    B.interior
    C.border
    D.routing

    答案：B
    解析：

  • 第4题：

    Which of the following statements regarding routed and routing protocols are true?（）

    • A、A routed protocol is assigned to an interface and determines the method of packet deliver.
    • B、A routing protocol determines the path of a packet through a network.
    • C、A routed protocol determines the path of a packet through a network.
    • D、A routing protocol operates at the transport layer of the OSI model.
    • E、A routed protocol updates the routing table of a router.

    正确答案:A,B

  • 第5题：

    A routing protocol is required that supports: 1)routing update authentication 2)an addressing scheme that conserves IP addresses 3)multiple vendors 4)a network with over 50 routers Which routing protocol fulfills these requirements（）。

    • A、RIPv1
    • B、RIPv2
    • C、EIGRP
    • D、OSPF

    正确答案:D

  • 第6题：

    RIP（Routing Information Protocol）中路由协议是典型的（）算法，而OSP（Open Shortest Path First）是链路状态算法。


    正确答案:距离向量

  • 第7题：

    RIP（Routing Information Protocol）路由协议是典型的（）算法，而OSPF（Ope nShortes tPath First）是链路状态算法。


    正确答案:距离向量

  • 第8题：

    What are three characteristics of the OSPF routing protocol?（）

    • A、It converges quickly.
    • B、OSPF is a classful routing protocol.
    • C、It uses cost to determine the best route.
    • D、It uses the DUAL algorithm to determine the best route.
    • E、OSPF routers send the complete routing table to all directly attached routers.
    • F、OSPF routers discover neighbors before exchanging routing information.

    正确答案:A,C,F

  • 第9题：

    多选题
    Open Shortes t Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF). Which two statements best describe the OSPF link - state routing pro tocol?（）
    A

    OSPF sends updates every 10 seconds

    B

    OSPF sends triggered updates when a network change occurs

    C

    When a link state is changed, the router that detected the change creates a link - state advertisement (LSA) and propagates it  to all OSPF devices using the 224.0.0.6 multicast address

    D

    OSPF sends summaries of individual link- state entries every 30 minutes to ensure LSDB synchronization


    正确答案： C,A
    解析： 暂无解析

  • 第10题：

    多选题
    Part of the job as a network administrator is being able to make a distinction between routed protocols and routing protocols. Which of the following statements is true regarding them?（）
    A

    A routing protocol is assigned to an interface and determines the method of packet delivery.

    B

    A routed protocol is assigned to an interface and determines the method of packet delivery.

    C

    A routing protocol determines the path of a packet through a network.

    D

    A routed protocol determines the path of a packet through a network.

    E

    A routing protocol operates at the transport layer of the OSI model.

    F

    A routed protocol updates the routing table of a router.


    正确答案： F,B
    解析： 暂无解析

  • 第11题：

    多选题
    Which of the following statements regarding routed and routing protocols are true?（）
    A

    A routed protocol is assigned to an interface and determines the method of packet deliver.

    B

    A routing protocol determines the path of a packet through a network.

    C

    A routed protocol determines the path of a packet through a network.

    D

    A routing protocol operates at the transport layer of the OSI model.

    E

    A routed protocol updates the routing table of a router.


    正确答案： A,E
    解析： 暂无解析

  • 第12题：

    填空题
    RIP（Routing Information Protocol）路由协议是典型的（）算法，而OSPF（Ope nShortes tPath First）是链路状态算法。

    正确答案： 距离向量
    解析： 暂无解析

  • 第13题：

    The Testking network has been configured with OSPF as the routing protocol.What is the default administrative distance of the OSPF routing protocol?()

    A.90

    B.100

    C.110

    D.120

    E.130

    F.170

    G.200


    参考答案：C

  • 第14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

    答案：B
    解析：

  • 第15题：

    Part of the job as a network administrator is being able to make a distinction between routed protocols and routing protocols. Which of the following statements is true regarding them?（）

    • A、A routing protocol is assigned to an interface and determines the method of packet delivery.
    • B、A routed protocol is assigned to an interface and determines the method of packet delivery.
    • C、A routing protocol determines the path of a packet through a network.
    • D、A routed protocol determines the path of a packet through a network.
    • E、A routing protocol operates at the transport layer of the OSI model.
    • F、A routed protocol updates the routing table of a router.

    正确答案:B,C

  • 第16题：

    The Testking network has been configured with OSPF as the routing protocol.What is the default administrative distance of the OSPF routing protocol?（）

    • A、90
    • B、100
    • C、110
    • D、120
    • E、130
    • F、170
    • G、200

    正确答案:C

  • 第17题：

    Open Shortes t Path First (OSPF) is a routing protocol developed for Internet Protocol (IP) networks by the Interior Gateway Protocol (IGP) working group of the Internet Engineering Task Force (IETF). Which two statements best describe the OSPF link - state routing pro tocol?（）

    • A、OSPF sends updates every 10 seconds
    • B、OSPF sends triggered updates when a network change occurs
    • C、When a link state is changed, the router that detected the change creates a link - state advertisement (LSA) and propagates it  to all OSPF devices using the 224.0.0.6 multicast address
    • D、OSPF sends summaries of individual link- state entries every 30 minutes to ensure LSDB synchronization

    正确答案:B,D

  • 第18题：

    IP协议属于Routed Protocol还是属于Routing Protocol，为什么？


    正确答案: IP协议属于Routed Protocol
    Routed protocol（可被路由的协议）也称为网络协议，是第三层协议。主要包括IP、IPX、APPLETALK等，定义了包的格式以及如何传送！
    Routing protocol（路由协议）：主要负责数据包的寻址，以提供到达目标网络的最佳路径。是实现路由算法的协议，告诉路由器如何进行路由选择、更新、维护路由表等。它给各种网络协议做向导。

  • 第19题：

    How will router A choose a path to the 10.1.2.0/24 network when different routing protocols are configured (Choose three.)（）。

    • A、If RIPv2 is the routing protocol, only the path AD will be installed in the routing table by default.
    • B、If RIPv2 is the routing protocol, the equal cost paths ABD and ACD will be installed in the routing table by default.
    • C、If EIGRP is the routing protocol, only the path AD will be installed in the routing table by default.
    • D、If EIGRP is the routing protocol, the equal cost paths ABD and ACD will be installed in the routing table by default.
    • E、If EIGRP and OSPF are both running on the network, the EIGRP paths will be installed in the routing table.
    • F、If EIGRP and OSPF are both running on the network, the OSPF paths will be installed in the routing table.

    正确答案:A,D,E

  • 第20题：

    Which command allows viewing of only OSPF routes?（）

    • A、show ip ospf route
    • B、show ip route protocol ospf
    • C、show route protocol ospf
    • D、show ospf table

    正确答案:C

  • 第21题：

    填空题
    RIP（Routing Information Protocol）中路由协议是典型的（）算法，而OSP（Open Shortest Path First）是链路状态算法。

    正确答案： 距离向量
    解析： 暂无解析

  • 第22题：

    单选题
    The Testking network has been configured with OSPF as the routing protocol.What is the default administrative distance of the OSPF routing protocol?（）
    A

    90

    B

    100

    C

    110

    D

    120

    E

    130

    F

    170

    G

    200


    正确答案： G
    解析： 暂无解析

  • 第23题：

    多选题
    How will router A choose a path to the 10.1.2.0/24 network when different routing protocols are configured (Choose three.)（）。
    A

    If RIPv2 is the routing protocol, only the path AD will be installed in the routing table by default.

    B

    If RIPv2 is the routing protocol, the equal cost paths ABD and ACD will be installed in the routing table by default.

    C

    If EIGRP is the routing protocol, only the path AD will be installed in the routing table by default.

    D

    If EIGRP is the routing protocol, the equal cost paths ABD and ACD will be installed in the routing table by default.

    E

    If EIGRP and OSPF are both running on the network, the EIGRP paths will be installed in the routing table.

    F

    If EIGRP and OSPF are both running on the network, the OSPF paths will be installed in the routing table.


    正确答案： D,B
    解析： 暂无解析

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