What are some common layer 2 encapsulations for a WAN link?()A. EthernetB. PPPC. Token RingD. HDLCE. Frame RelayF. POTS

题目
What are some common layer 2 encapsulations for a WAN link?()

A. Ethernet

B. PPP

C. Token Ring

D. HDLC

E. Frame Relay

F. POTS

相似考题

1.In a Bridged 1483 network, what Layer 2 encapsulations are passed between the DSL bridge and the ERX?()A. single ATM headerB. single Ethernet headerC. ATM header followed by a PPP headerD. ATM header followed by an Ethernet header

2.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

3.Which WAN service utilizes two different encapsulation types (one for data and one for signaling) on its data link layer?()A. ISDNB. Frame RelayC. ATMD. FDDI

4.After issuing the show interfaces terse command, you notice that the status of one interface is "up down". What does this indicate?"()A.Layer 1 on the interface is up but Layer 2 is down.B.Layer 2 on the interface is up but Layer 3 has not been configured.C.The interface is administratively up but the link status is down.D.The interface is up but has been administratively turned off.

更多“What are some common layer 2 encapsulations for a WAN link?() ”相关问题

  • 第1题：

    Which of these recommended designs provides the highest availability?()

    A. map the Layer 2 VLAN number to the Layer 3 subnet

    B. control route propagation to edge switches using distribute lists

    C. use a Layer 2 distribution interconnection link with HSRP or GLBP

    D. use a Layer 3 distribution interconnection link with HSRP or GLBP

    E. use equal-cost Layer 3 load balancing on all links to limit the scope of queries in EIGRP


    参考答案：A

  • 第2题：

    What are two enhancements that OSPFv3 supports over OSPFv2? ()

    A.It requires the use of ARP.

    B.It can support multiple IPv6 subnets on a single link.

    C.It supports up to 2 instances of OSPFv3 over a common link.

    D.It routes over links rather than over networks.


    参考答案：B, D

  • 第3题：

    Which WAN service utilizes two different encapsulation types (one for data and one for signaling) on its data link layer?（）

    • A、ISDN
    • B、Frame Relay
    • C、ATM
    • D、FDDI

    正确答案:A

  • 第4题：

    What are some common layer 2 encapsulations for a WAN link?（）

    • A、Ethernet
    • B、PPP
    • C、Token Ring
    • D、HDLC
    • E、Frame Relay
    • F、POTS

    正确答案:B,D,E

  • 第5题：

    What are three factors used to determine the amount of bandwidth that is required for a single VoIP call？（）

    • A、codec
    • B、link speed
    • C、Layer 2 encapsulation
    • D、packet overhead （IP/UDP/RTP）
    • E、link delay
    • F、total number of simultaneous calls that are allowed

    正确答案:A,C,D

  • 第6题：

    What is the most common cause of network congestion？（）

    • A、aggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switches
    • B、speed mismatches when moving from a low-speed LAN environment to a higher speed WAN environment
    • C、flapping Ethernet interfaces caused by misconfigured LAN interfaces
    • D、flapping serial interfaces caused by misconfigured WAN interfaces
    • E、speed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment

    正确答案:E

  • 第7题：

    As a frame leaves a Layer 3 device, the Layer 2 encapsulation information is changed from what it was when it entered the devicE.For what two reasons can this happen? （）

    • A、The data is moving from 10BASE-TX to 100BASE-TX.
    • B、The WAN encapsulation type has changed.
    • C、The data format has changed from analog to digital.
    • D、The source and destination hosts are in the same subnet.
    • E、The source and destination MAC addresses have changed.

    正确答案:B,D

  • 第8题：

    单选题
    What is the most common cause of network congestion？（）
    A

    aggregation congestion occurring at the core layer where the different distribution layer devices feed traffic to the core-layer switches

    B

    speed mismatches when moving from a low-speed LAN environment to a higher speed WAN environment

    C

    flapping Ethernet interfaces caused by misconfigured LAN interfaces

    D

    flapping serial interfaces caused by misconfigured WAN interfaces

    E

    speed mismatches when moving from a high-speed LAN environment to a lower speed WAN environment


    正确答案： C
    解析： 暂无解析

  • 第9题：

    多选题
    What two features in Cisco switches help prevent Layer 2 loops？（）
    A

    UniDirectional Link Detection

    B

    Hot Standby Router Protocol

    C

    Virtual Router Redundancy Protocol

    D

    PortFast

    E

    root guard

    F

    loop guard


    正确答案： F,D
    解析： 暂无解析

  • 第10题：

    单选题
    Which of these recommended designs provides the highest availability？（）
    A

     map the Layer 2 VLAN number to the Layer 3 subnet

    B

     control route propagation to edge switches using distribute lists

    C

     use a Layer 2 distribution interconnection link with HSRP or GLBP

    D

     use a Layer 3 distribution interconnection link with HSRP or GLBP

    E

     use equal-cost Layer 3 load balancing on all links to limit the scope of queries in EIGRP


    正确答案： E
    解析： 暂无解析

  • 第11题：

    多选题
    Although TCP segments differ from UDP segments, they both contain some common fields. What two segments do they share in common?（）
    A

    source address

    B

    options

    C

    sequence number

    D

    sources

    E

    destination port

    F

    checksum


    正确答案： D,B
    解析： 暂无解析

  • 第12题：

    单选题
    What is the meaning of integration?（）
    A

    To link some separate factors as a whole chain    

    B

    United

    C

    To put together                              

    D

    Mixture


    正确答案： B
    解析： 暂无解析

  • 第13题：

    Which two of these are correct regarding the recommended practice for distribution layer design based on the following configuration?()

    A. use a Layer 2 link between distribution switches

    B. use a Layer 3 link between distribution switches

    C. use a redundant link to the core

    D. use a Layer 3 link between distribution switches with route summarization


    参考答案：C, D

  • 第14题：

    When you design QoS on CE for an MPLS Layer 2 VPN， which three things should be considered？（）

    • A、Layer 2 access link QoS design
    • B、enterprise-to-service-provider mapping models
    • C、Layer 3 link access QoS design
    • D、service provider service level agreements
    • E、Layer 2 link access load balancing

    正确答案:A,B,D

  • 第15题：

    Which of these recommended designs provides the highest availability?（）

    • A、map the Layer 2 VLAN number to the Layer 3 subnet
    • B、control route propagation to edge switches using distribute lists
    • C、use a Layer 2 distribution interconnection link with HSRP or GLBP
    • D、use a Layer 3 distribution interconnection link with HSRP or GLBP
    • E、use equal-cost Layer 3 load balancing on all links to limit the scope of queries in EIGRP

    正确答案:A

  • 第16题：

    The Acme company has determined that during its busiest hours， the average number of internal VoIP calls across the WAN link is four （4）. Since this is an average， the WAN link has been sized for six （6） calls with no call admission control. What will happen when a seventh call is attempted across the WAN link？ （）

    • A、the seventh call is routed via the PSTN
    • B、the call is denied and the original six （6） calls remain
    • C、the call is completed and the first call is dropped
    • D、the call is completed， but all calls have quality issues
    • E、the call is completed but the seventh call has quality issues

    正确答案:D

  • 第17题：

    What is the meaning of integration?（）

    • A、To link some separate factors as a whole chain    
    • B、United
    • C、To put together                              
    • D、Mixture

    正确答案:A

  • 第18题：

    What are two enhancements that OSPFv3 supports over OSPFv2? （）

    • A、It requires the use of ARP.
    • B、It can support multiple IPv6 subnets on a single link.
    • C、It supports up to 2 instances of OSPFv3 over a common link.
    • D、It routes over links rather than over networks.

    正确答案:B,D

  • 第19题：

    What two features in Cisco switches help prevent Layer 2 loops？（）

    • A、UniDirectional Link Detection
    • B、Hot Standby Router Protocol
    • C、Virtual Router Redundancy Protocol
    • D、PortFast
    • E、root guard
    • F、loop guard

    正确答案:A,F

  • 第20题：

    单选题
    Click the Exhibit button. In the exhibit, if the link we are measuring is 1.5 Mbps, what is the effective WAN bandwidth?（）
    A

    0.947 Mbps

    B

    3.000 Mbps

    C

    4.065 Mbps 

    D

    282.058 Mbps


    正确答案： A
    解析： 暂无解析

  • 第21题：

    单选题
    Which of these recommended designs provides the highest availability?（）
    A

    map the Layer 2 VLAN number to the Layer 3 subnet

    B

    control route propagation to edge switches using distribute lists

    C

    use a Layer 2 distribution interconnection link with HSRP or GLBP

    D

    use a Layer 3 distribution interconnection link with HSRP or GLBP

    E

    use equal-cost Layer 3 load balancing on all links to limit the scope of queries in EIGRP


    正确答案： D
    解析： 暂无解析

  • 第22题：

    多选题
    What are some common layer 2 encapsulations for a WAN link?（）
    A

    Ethernet

    B

    PPP

    C

    Token Ring

    D

    HDLC

    E

    Frame Relay

    F

    POTS


    正确答案： D,E
    解析： 暂无解析

  • 第23题：

    单选题
    In a Bridged 1483 network, what Layer 2 encapsulations are passed between the DSL bridge and the ERX?（）
    A

    single ATM header

    B

    single Ethernet header

    C

    ATM header followed by a PPP header

    D

    ATM header followed by an Ethernet header


    正确答案： D
    解析： 暂无解析

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