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Traditional network layer packet forwarding relies on the information provided by network layer（ ）protocols,or static routing,to make an independent forwarding decision at each（ ）within the network．The forwarding decision is based solely on the destinatio

题目
Traditional network layer packet forwarding relies on the information provided by network layer（ ）protocols,or static routing,to make an independent forwarding decision at each（ ）within the network．The
forwarding decision is based solely on the destination（本题）IP address．All packets for the same destination follow the same path across the network if no other equal-cost（ ）exist．Whenever a router has two equal-cost pathstoward a destination,the packets toward the destination might take one or both of them,resulting in some degree of load sharing．Enhanced Interior Gateway Routing Protocol（EIGRP）also supports non-equal-cost（ ）sharing although the default behavior of this protocol is equal-cost．You must configure EIGRP variance for non-equal-cost load balancing．

A.connection
B.transmission
C.broadcast
D.customer
相似考题

1.阅读下面的短文，回答问题 [When an IP packet arrives at a router, generally the router looks at the destination address of the packet, and forwards the packet to one of its network interfaces. The forwarding decision is usually done by looking up the destination address from another data structure called a forwarding table. The forwarding table is created by the router using the routing table and possible routing policies existing in the router. The router then creates a table where it lists which networks are accessible through which of the router’s network interfaces. An IP router looks at every IP packet individually and does the forwarding decision on a packet-by-packet basis. If something changes in the router’s routing table, a packet can take a different route from a preceding packet even if it has the same destination.] From the paragraph above，we can see that the router （ ） a forwarding table according to the routing table and possible routing policies existing in the router. When an IP packet arrives at a router, the （ ） part of packet is normally checked by the router. An IP router checks every IP Packet individually and makes the forwarding decision based on （ ）.A．is generating B．generate C．is generated D．generates A．forwarding table B．network interfaces C．routing policies D．destination address A．the destination address and network interfaces B．forwarding table and network interfaces C．the destination address and forward table D．routing policies and routing table

2.Which three statements are true of dynamic routing protocols?()A.They are scalable.B.They are Dijkstra based.C.They share network layer reach ability information among neighbors.D.They automate next hopdecisions.E.They are tolerant of configuration errors.

3.Together with the network layer,the transport layer is the heart of the protocol（ ）The network layer provides end-to-end（ ） delivery using datagrams or virtual circuits.The transport layer builds on the network layer to provide data transport from a process on a（ ）machine to a process on a destination machine with a desired level of reliability that is independent of the physical （ ） currently in use.It provides the abstractions that applications nedd to use the network..Without the（ ） layer,the whole concept of layered protocols would make little sense.A.transport B.network C.hierarchy D.service A.packet B.data C.command D.record A.connection B.terminal C.source D.destination A.traffic B.connection C.lines D.networks A.network B.transport C.link D.physical

4.TCP functions at the Open System Interconnection(OSI)(61)layer, or Layer 4. Its chief responsibility is to ensure(62)end-to-end connectivity. IP, located one layer down, at the OSI network layer, or Layer 3, communicates the addresses of each(63)sender and receiver to the routers along the way. Routers and Layer 3 switches can read IP and other Layer 3(64). This information, combined with routing tables and other network intelligence, is all it takes to get(65)the room or around the world via TCP/IP.A．transposeB．translateC．transmitD．transport

更多“Traditional network layer packet forwarding relies on the information provided by network layer（ ）protocols,or static routing,to make an independent forwarding decision at each（ ）within the network．T”相关问题

  • 第1题：

    Routers perform the decision process that selects what path a packet takes. These （ ） layer devices participate it the collection and distribution of network-layer information, and perform Layer 3 switching based on the contents of the network layer （ ） of each packet. You can connect the routers directly by point-to-point （ ） or local-area networks, or you can connect them by LAN or WAN switches. These Layer 2 switches unfortunately do not have the capability to hold Layer 3 （ ） information or to select the path taken by a packet through analysis of its Layer 3 destination address. Thus, Layer 2 switches be involved in the Layer 3 packet （ ） decision process.

    A.application B. network C.physical D.link A.header B.connection C.protocol D.data A.medium B.links C.switches D.carriers A.network B.links C.protocol D.routing A.switching B.processing C.forwarding D.connecting


    正确答案：B,A,B,D,C

  • 第2题：

    Together with the network layer,the transport layer is the heart of the protocol ( 请作答此空).The network layer provides end-to-end () delivery using datagrams or virtual circuits.The transport layer builds on the network layer to provide data transport from a process on a () machine to a process on a destination machine with a desired level of reliability that is independent of the physical () currently in use.It provides the abstractions that applications nedd to use the network..Without the () layer,the whole concept of layered protocols would make little sense.

    A.transport
    B.network
    C.hierarchy
    D.service

    答案：C
    解析：

  • 第3题：

    Traditional IP packet forwarding analyzes the（ ）IP address contained in the network layer header of each packet as the packet travels from its source to its final destination.A router analyzes the destination IP address independently at each hop in the network.Dynamic（ ）protocols or static configuration builds the database needed to analyze the destination IP address（the routing table）.The process of implementing traditional IP routing also is called hop-by-hop destination-based（ ）routing.Although successful，and obviously widely deployed，certain restrictions，which have been realized for some time，exist for this method of packet forwarding that diminish is（请作答此空）.New techniques are therefore required to address and expand the functionality of an IP-based network infrastructure.This first chapter concentrates on identifying these restrictions and presents a new archiecture，known as multiprotocol（ ）switching，that provides solutions some of these restrictions.

    A.reliability
    B.flexibility
    C.stability
    D.capability

    答案：B
    解析：
    传统的IP数据包转发分析目的IP地址,该地址包含在每个从源到最终目的地的网络层数据包的头部。一个路由器的分析目的IP地址，该地址独立在网络中的每跳。动态路由协议或静态配置构建数据库，该数据数据库需要分析目的IP地址（路由表）。实施传统的IP路由的过程也叫作基于目的地的逐条单播路由。虽然成功而且明显得广泛部署,并实现了一段时间，但是必然有某些限制,这种数据包转发方法的存在是减少了灵活性。新技术是因此需要地址和扩展一个基于ip的网络基础设施的功能。第一章集中在识别一种新的架构的限制条件和反馈,该架构众所周知是多协议标签交换,它为其中的一些限制条件提供解决方案。

  • 第4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5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6题：

    Company uses layer 3 switches in the Core of their network. Which method of Layer 3 switching  uses a forwarding information base （FIB）？（）

    • A、Topology-based switching
    • B、Demand-based switching
    • C、Route caching
    • D、Flow-based switching
    • E、None of the other alternatives apply

    正确答案:A

  • 第7题：

    Which statement is true regarding the forwarding plane?（）

    • A、The forwarding plane is contained within the Routing Engine (RE)
    • B、The forwarding plane processes and evaluates exception traffic
    • C、The forwarding plane contains the Packet Forwarding Engine (PFE)
    • D、The forwarding plane is not present on all platforms running the Junos OS

    正确答案:C

  • 第8题：

    Which two statements are correct about Nonstop Forwarding？（）

    • A、It allows the standby RP to take control of the device after a hardware or software fault on the active RP.
    • B、It is a Layer 3 function that works with SSO to minimize the amount of time a network is unavailable tousers following a switchover.
    • C、It is supported by the implementation of EIGRP， OSPF， RIPv2， and BGP protocols.
    • D、It synchronizes startup configuration， startup variables， and running configuration.
    • E、The main objective of NSF is to continue forwarding IP packets following a switchover.
    • F、Layer 2 802.1w or 802.1s must be used， as 802.1d cannot process the Layer 2 changes.
    • G、Routing protocol tuning parameters must be the same as the NSF parameters， or failover will beinconsistent.

    正确答案:B,E

  • 第9题：

    What are two reasons a network administrator would use CDP?（）

    • A、to verify the type of cable interconnecting two devices
    • B、to determine the status of network services on a remote device
    • C、to obtain VLAN information from directly connected switches
    • D、to verify Layer 2 connectivity between two devices when Layer 3 fails
    • E、to obtain the IP address of a connected device in order to telnet to the device
    • F、to determine the status of the routing protocols between directly connected routers

    正确答案:D,E

  • 第10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11题：

    多选题
    What are two reasons a network administrator would use CDP (Choose two.)（）。
    A

    to verify the type of cable interconnecting two devices

    B

    to determine the status of network services on a remote device

    C

    to obtain VLAN information from directly connected switches

    D

    to verify Layer 2 connectivity between two devices when Layer 3 fails

    E

    to obtain the IP address of a connected device in order to telnet to the device

    F

    to determine the status of the routing protocols between directly connected routers


    正确答案： C,D
    解析： 暂无解析

  • 第12题：

    单选题
    Company uses layer 3 switches in the Core of their network. Which method of Layer 3 switching  uses a forwarding information base （FIB）？（）
    A

    Topology-based switching

    B

    Demand-based switching

    C

    Route caching

    D

    Flow-based switching

    E

    None of the other alternatives apply


    正确答案： D
    解析： 暂无解析

  • 第13题：

    Which two practices will avoid Cisco Express Forwarding polarization?()

    A. The core layer should use default Layer 3 hash information.

    B. The core layer should use default Layer 4 hash information.

    C. The distribution layer should use default Layer 3 hash information.

    D. The distribution layer should use default Layer 4 hash information.

    E. The core layer should use Layer 3 and Layer 4 information as input to the Cisco Expressing Forwarding hashing algorithm.

    F. The distribution layer should use Layer 3 and Layer 4 information as input into the Cisco Expressing Forwarding hashing algorithm.


    参考答案：A, F

  • 第14题：

    Traditional network layer packet forwarding relies on the information provided by network layer （） protocols, or static routing, to make an independent （本题）decision at each hop within the network. The forwarding （）is based solely on the destination （）IP address. All packets for the same destination follow the same path across the network if no other equal-cost paths exist. Whenever a router has two equal-cost （）toward a destination, the packets toward the destination might take one or both of them, resulting in some degree of load sharing.

    A.switch
    B.hop
    C.host
    D.cunstomer

    答案：B
    解析：

  • 第15题：

    Traditional network layer packet forwarding relies on the information provided by network layer（ ）protocols,or static routing,to make an independent forwarding decision at each（本题）within the network．The forwarding decision is based solely on the destination（ ）IP address．All packets for the same destination follow the same path across the network if no other equal-cost（ ）exist．Whenever a router has two equal-cost pathstoward a destination,the packets toward the destination might take one or both of them,resulting in some degree of load sharing．Enhanced Interior Gateway Routing Protocol（EIGRP）also supports non-equal-cost（ ）sharing although the default behavior of this protocol is equal-cost．You must configure EIGRP variance for non-equal-cost load balancing．

    A.switch
    B.hop
    C.host
    D.customer

    答案：B
    解析：

  • 第16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17题：

    What is a static packet-filtering firewall used for ？（）

    • A、It validates the fact that a packet is either a connection request or a data packet belonging to a connection
    • B、It evaluates network packets for valid data at the application layer before allowing connections
    • C、It analyzes network traffic at the network and transport protocol layers
    • D、It keeps track of the actual communication process through the use of a state table

    正确答案:C

  • 第18题：

    Which three statements are true of dynamic routing protocols?（）

    • A、They are scalable.
    • B、They are Dijkstra based.
    • C、They share network layer reach ability information among neighbors.
    • D、They automate next hopdecisions.
    • E、They are tolerant of configuration errors.

    正确答案:A,C,D

  • 第19题：

    Which three statements accurately describe layer 2 Ethernet switches?（）

    • A、Microsegmentation decreases the number of collisions on the network.
    • B、if a switch receives a frame for an unkown destination,it uses ARP to resolve the address.
    • C、Spanning Tree Protocol allows switches to automatically share vlan information.
    • D、In a properly functioning network with redundant switched paths,each switched aegment will contain one root bridge with all its ports in the forwarding state.All other switches in that broadcast domain will have only one root port.
    • E、Establishing vlans increases the number of broadcast domains.
    • F、Switches that are configured with vlans make forwarding decisions based on both layer 2 and layer 3 address information.

    正确答案:A,D,F

  • 第20题：

    What are two reasons a network administrator would use CDP (Choose two.)（）。

    • A、to verify the type of cable interconnecting two devices
    • B、to determine the status of network services on a remote device
    • C、to obtain VLAN information from directly connected switches
    • D、to verify Layer 2 connectivity between two devices when Layer 3 fails
    • E、to obtain the IP address of a connected device in order to telnet to the device
    • F、to determine the status of the routing protocols between directly connected routers

    正确答案:D,E

  • 第21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22题：

    单选题
    Cisco Express Forwarding (CEF) is mainly used to increase packet switching speed, reducing the overhead and delays introduced by other routing techniques, increasing overall performance.Which of the following concerning CEF is recommended by Cisco?（）
    A

    Use default Layer 4 hash in core.

    B

    Use default Layer 3 hash in distribution.

    C

    Use default Layer 4 hash in distribution.

    D

    Use default Layer 3 hash in core and Layer 3 + Layer 4 hash in distribution layer.


    正确答案： D
    解析： 暂无解析

  • 第23题：

    单选题
    Which statement is true regarding the forwarding plane?（）
    A

    The forwarding plane is contained within the Routing Engine (RE)

    B

    The forwarding plane processes and evaluates exception traffic

    C

    The forwarding plane contains the Packet Forwarding Engine (PFE)

    D

    The forwarding plane is not present on all platforms running the Junos OS


    正确答案： B
    解析： 暂无解析

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