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Split horizon has been enabled within the Ezonexam routed network. Which one of the following statements best explains the split horizon rule?A．Only routers can split boundaries (horizons) between networks in separate AS numbers.B．Each AS must keep routin

题目

Split horizon has been enabled within the Ezonexam routed network. Which one of the following statements best explains the split horizon rule?

A．Only routers can split boundaries (horizons) between networks in separate AS numbers.

B．Each AS must keep routing tables converged to prevent dead routes from being advertised across boundaries.

C．Once a route is received on an interface, advertise that route as unreachable back out the same interface.

D．Information about a route should never be sent back in the direction from which the original update came.

E．None of the above

相似考题

1.Which two statements best describes the role of a router on a broadcast domain?()A.Routers facilitate communications within a broadcast domain.B.Routers facilitate communications between broadcast domains.C.Routers are used to break up broadcast domains into separate networks.D.Routers are used to connect small broadcast domains and form larger more efficient broadcast domains

2.Which of the following statements correctly describes the characteristics of a Frame Relay point－to－point subinterface?()A. Needs to use Inverse ARP.B. Maps a single IP subnet per DLCI.C. Maps a single IP subnet across multiple DLCIs.D. Resolves NBMA (non broadcast multi access) split horizon issues.E. Requires use of the frame-relay map command.F. None of the above

3.Which one of the following statements best explains the split horizon rule used in distance vector routing protocols?()A. Only routers can split boundaries (horizons) between concentric networks.B. Each AS must keep routing tables converged to prevent dead routes from being advertised across boundaries.C. Networks can only remain fully converged if all information is sent out all active interfaces.D. Information about a route should not be sent back in the direction from which the original update came.E. Distance vector protocols need fall back routers that are responsible for momentary loops.

4.Which two statements are true about IBGP neighbor relationships?()A. The BGP split - horizon rule specifies that routes learned via EBGP are never propagated to other IBGP peers.B. The BGP split horizon rule specifies that routes learned via IBGP are never propagated to other IBGP peers.C. A full - mesh IBGP requires that neighbor relationships be established between a ll BGP enabled routers in the autonomous system.D. IBGP neighbors must be in different autonomous systems.E. An EGP or static routing is required between IBGP neighbors.

参考答案和解析
正确答案：D
解析：Explanation:
The split horizon rule states:
* Never advertise a route out of the interface through which you learned it.

For instance, in Figure 4a below, if Router One is connected to Routers Two and Three through a single multipoint interface (such as Frame. Relay), and Router One learned about Network A from Router Two, it will not advertise the route to Network A back out the same interface to Router Three. Router one assumes that Router Three would learn about Network A directly from Router Two.


Incorrect Answers:
A: There is no such requirement

B: Distance vector protocols updates routing table at regular intervals instead of Topology changes

C: This is the definition of the poison reverse rule, not the split horizon rule.
更多“Split horizon has been enabled within the Ezonexam routed network. Which one of the following statements best explains the split horizon rule?A．Only routers can split boundaries (horizons) between networks in separate AS numbers.B．Each AS must keep routin”相关问题

  • 第1题：

    Refer to the exhibit. Router RTA is the hub router for routers RTB and RTC. The Frame Relay network is configured with EIGRP, and the entire network is in autonomous system 1. However,router RTB a nd RTC are not receiving each other‘s routes. What is the solution?（）

    A.Check and change the access lists on router RTA

    B.Configure the auto summary command under router eigrp 1 on router RTA

    C.Configure subinterfaces on the spoke routers and assig n different IP address subnets for each subinterface

    D.Issue the no ip split horizon command on router RTA

    E.Issue the no ip split horizon eigrp 1 command on router RTA

    F.Configure a distribute list on router RTA that allows it to advertise all r outes to the spoke routers


    参考答案：E

  • 第2题：

    Which statement describes the rule of split horizon?（）

    • A、Only routers can split boundaries (horizons) between concentric networks.
    • B、All distance vector protocols require fall back routers that may cause momentary loops as the topology changes.
    • C、Networks can only remain fully converged if all information about routers is sent out all active interfaces.
    • D、Information about a route should not be sent back in the direction from which the original update come.
    • E、Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.

    正确答案:D

  • 第3题：

    how to disable OPSF split-horizon？


    正确答案: According to RFC 2328，the rule of ospf split-horizon is described as below： before ABR advertises a summary LSAs（including type 3 and type 4 LSA） to a attached area， if the next hop of the route in the routing table entry belong to the area itself， do not generate a summary-LSA for the route into the area.
    Split-horizon cannot be disabled.

  • 第4题：

    Which one of the following potential issues is eliminated by using split horizon？（）

    • A、Joined horizons
    • B、Packet forwarding loops
    • C、cisco Express Forwarding load-balancing inconsistency
    • D、Asymmetric routing throughout the network

    正确答案:B

  • 第5题：

    Which two statements are true about the role of split horizon？（）

    • A、It is a function used by routing protocols to install routes into routing table
    • B、It is a function that prevents the advertising of routes over an interface that the router is usingto reach a route
    • C、Its function is to help avoid routing loops.
    • D、It is a redistribution technique used by routing protocols

    正确答案:B,C

  • 第6题：

    Which two statements about VPLS are true？ （）

    • A、There is a full mesh of pseudowires.
    • B、There is a partial mesh of pseudowires.
    • C、Only L2TPv3 can be used for pseudowire establishment.
    • D、There is split-horizon to avoid loops.

    正确答案:A,D

  • 第7题：

    Which two statements best describes the role of a router on a broadcast domain?（）

    • A、Routers facilitate communications within a broadcast domain.
    • B、Routers facilitate communications between broadcast domains.
    • C、Routers are used to break up broadcast domains into separate networks.
    • D、Routers are used to connect small broadcast domains and form larger more efficient broadcast domains

    正确答案:B,C

  • 第8题：

    单选题
    Which one of the following statements best explains the split horizon rule used in distance vector routing protocols?（）
    A

    Only routers can split boundaries (horizons) between concentric networks.

    B

    Each AS must keep routing tables converged to prevent dead routes from being advertised across boundaries.

    C

    Networks can only remain fully converged if all information is sent out all active interfaces.

    D

    Information about a route should not be sent back in the direction from which the original update came.

    E

    Distance vector protocols need fall back routers that are responsible for momentary loops.


    正确答案： A
    解析： 暂无解析

  • 第9题：

    多选题
    Which of the following statements correctly describes the characteristics of a Frame Relay point-to-point subinterface?（）
    A

    Needs to use Inverse ARP.

    B

    Maps a single IP subnet per DLCI.

    C

    Maps a single IP subnet across multiple DLCIs.

    D

    Resolves NBMA (non broadcast multi access) split horizon issues.

    E

    Requires use of the frame-relay map command.

    F

    None of the above


    正确答案： B,F
    解析： 暂无解析

  • 第10题：

    单选题
    Which statement describes the rule of split horizon?（）
    A

    Only routers can split boundaries (horizons) between concentric networks.

    B

    All distance vector protocols require fall back routers that may cause momentary loops as the topology changes.

    C

    Networks can only remain fully converged if all information about routers is sent out all active interfaces.

    D

    Information about a route should not be sent back in the direction from which the original update come.

    E

    Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.


    正确答案： C
    解析： 暂无解析

  • 第11题：

    多选题
    Which two statements about VPLS are true？ （）
    A

    There is a full mesh of pseudowires.

    B

    There is a partial mesh of pseudowires.

    C

    Only L2TPv3 can be used for pseudowire establishment.

    D

    There is split-horizon to avoid loops.


    正确答案： A,D
    解析： 暂无解析

  • 第12题：

    问答题
    how to disable OPSF split-horizon？

    正确答案： According to RFC 2328，the rule of ospf split-horizon is described as below： before ABR advertises a summary LSAs（including type 3 and type 4 LSA） to a attached area， if the next hop of the route in the routing table entry belong to the area itself， do not generate a summary-LSA for the route into the area.
    Split-horizon cannot be disabled.
    解析： 暂无解析

  • 第13题：

    Which statement describes the rule of split horizon?()

    A. Only router can split boundaries(horizons)between concentric networks.

    B. All distance vector protocols require fall routes that may cause momentary loops as the topology changes.

    C. Networks can only remain fully converged if all information about routes is sent out all active interfaces.

    D. Information about a route should not be sent back in the direction from which the original update came.

    E. Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.


    参考答案：D

  • 第14题：

    What are two characteristics of Frame Relay point-to-point subinterfaces?（）

    • A、They create split-horizon issues
    • B、They require a unique subnet within a routing domain
    • C、They emulate leased lines
    • D、They are ideal for full-mesh topologies
    • E、They require the use of NBMA options when using OSPF

    正确答案:B,C

  • 第15题：

    Which one of the following statements best explains the split horizon rule?（）

    • A、Only routers can split boundaries (horizons) between networks in separate AS numbers.
    • B、Each AS must keep routing tables converged to prevent dead routes from being advertised across boundaries.
    • C、Once a route is received on an interface, advertise that route as unreachable back out the same interface.
    • D、Information about a route should never be sent back in the direction from which the original update came.

    正确答案:D

  • 第16题：

    Which two of the following are valid characteristics of EIGRP?（）

    • A、Has a maximum hop count of 25
    • B、Can differentiate between internal and external routes
    • C、Uses a 32-bit metric
    • D、Can maintain only one routing table
    • E、Need all networks to use the same subnet mask
    • F、Supports only one routed protocol

    正确答案:B,C

  • 第17题：

    It has become necessary to configure an existing serial interface to accept a second Frame Relay virtualcircuit.Which of the following processes are required to accomplish this task？（）

    • A、configure static frame relay map entries for each subinterface network.
    • B、remove the ip address from the physical interface
    • C、create the virtual interfaces with the interface command
    • D、configure each subinterface with its own IP address
    • E、disable split horizon to prevent routing loops between the subinterface networks
    • F、encapsulate the physical interface with multipoint PPP

    正确答案:B,C,D

  • 第18题：

    Within a BGP confederation， how are routing loops avoided？（）

    • A、Split horizon.
    • B、AS confederation sequence.
    • C、The BFP cluster ID attribute.
    • D、The BGP originator ID attribute.

    正确答案:B

  • 第19题：

    什么是RIP协议的水平分割（split horizon）？


    正确答案: 不在收到这条路由信息的端口上再次发送它。

  • 第20题：

    问答题
    什么是RIP协议的水平分割（split horizon）？

    正确答案： 不在收到这条路由信息的端口上再次发送它。
    解析： 暂无解析

  • 第21题：

    单选题
    Which statement describes the rule of split horizon?（）
    A

    Only router can split boundaries(horizons)between concentric networks.

    B

    All distance vector protocols require fall routes that may cause momentary loops as the topology changes.

    C

    Networks can only remain fully converged if all information about routes is sent out all active interfaces.

    D

    Information about a route should not be sent back in the direction from which the original update came.

    E

    Each AS must keep routing tables converged to prevent dead routes from being advertised across the AS boundary.


    正确答案： E
    解析： 暂无解析

  • 第22题：

    多选题
    Which two statements are true about the role of split horizon？（）
    A

    It is a function used by routing protocols to install routes into routing table

    B

    It is a function that prevents the advertising of routes over an interface that the router is usingto reach a route

    C

    Its function is to help avoid routing loops.

    D

    It is a redistribution technique used by routing protocols


    正确答案： D,B
    解析： 暂无解析

  • 第23题：

    多选题
    Which three statements about EIGRP are true?（）
    A

    EIGRP converges fast RIP because of DUAL and backup routes that are stored in the topology table.

    B

    EIGRP uses a hello protocol to establish neighbor relationships

    C

    EIGRP uses split horizon and reverse poisoning to avoid routing loops.

    D

    EIGRP uses periodic updates to exchange routing information

    E

    EIGRP allows routers of different manufacturers to interoperate

    F

    EIGRP supports VLSM and authentication for routing updates.

    G

    EIGRP use a broadcast address to send routing information.


    正确答案： D,A
    解析： 暂无解析

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