Which encapsulation types are configurable on a Cisco switch for a trunk? (Select two answer choices)A. VTPB. ISLC. CDPD. 802.1QE. 802.1pF. LLCG. IETF

题目

Which encapsulation types are configurable on a Cisco switch for a trunk? (Select two answer choices)

A. VTP

B. ISL

C. CDP

D. 802.1Q

E. 802.1p

F. LLC

G. IETF

相似考题

1.如下图所示，3com和Cisco公司的交换机相互连接，在两台交换机之间需传输ULANID为1、10、20和30的4个VLAN信息，Catalyst 3548交换机VLAN Trunk的正确配置是A．Switch-3548 (config-if) #switchport trunk encapsulation dot 1 q Switch-3548 (config-if) #switchport trunk allowed vlan 1,10,20,30B．Switch-3548 (config-if) #switchport mode trunk Switch-3548 (config-if) #switchport trunk encapsulation isl Switch-3548 (config-if) #switchport trunk allowed vlan 1-30C．Switch-3548 (config-if) #switchport mode trunk Switch-3548 (config-if) #switchport trunk encapsulation negotiate Switch-3548 (config-if) #switchport trunk allowed vlan 1-30D．Switch-3548 (config-if) #switchport mode trunk Switch-3548 (config-if) #switchport trunk encapsulation dot 1q Switch-3548 (config-if) #switchport trunk allowed vlan 1,10,20,30

2.You need to configure an 802.1Q link on a Ezonexam switch. Which commands, when used together, would do this? (Select two answer choices)A. Switch(vlan) mode trunkB. Switch(config) switchport access mode trunkC. Switch(config-if) switchport mode trunkD. Switch(config-if) switchport trunk encapsulation dot1qE. Switch(config) switchport access mode 1F. Switch(vlan) trunk encapsulation dot1q

3.Which two of the addresses below are available for host addresses on the Ezonexam subnet 192.168.15.19/28? (Select two answer choices)A. 192.168.15.17B. 192.168.15.14C. 192.168.15.29D. 192.168.15.16E. 192.168.15.31F. None of the above

4.What are two characteristics of "store and forward" switching? (Select two answer choices)A．Latency fluctuates regardless of frame. size.B．The switch receives the complete frame. before beginning to forward it.C．Latency through the switch varies with frame. length.D．The switch checks the destination address upon receipt of headers.

参考答案和解析
正确答案：BD
B,D 解析：Explanation:
Trunks are used to carry traffic belonging to multiple VLANs between devices over the same link. A device can determine which VLAN the traffic belongs to by its VLAN identifier. The VLAN identifier is a tag that is encapsulated with the data. ISL and 802.1q are two types of encapsulations used to carry data from multiple VLANs over trunk links.

ISL is a Cisco proprietary protocol for interconnecting multiple switches and maintaining VLAN information as traffic goes between switches. ISL provides VLAN trunking capabilities while maintaining full wire speed performance on Ethernet links in full-duplex or half-duplex mode. ISL operates in a point-to-point environment and will support up to 1000 VLANs.

In ISL, the original frame. is encapsulated and an additional header is added before the frame. is carried over a trunk link. At the receiving end, the header is removed and the frame. is forwarded to the assigned VLAN. .ISL uses Per VLAN Spanning Tree (PVST) which runs one instance of Spanning Tree Protocol (STP) per VLAN.

PVST allows for optimal root switch placement for each VLAN and supports load balancing of VLANs over multiple trunk links. 802.1Q is the IEEE standard for tagging frames on a trunk and supports up to 4096 VLANs. In 802.1Q, the trunking device inserts a four-byte tag into the original frame. and re-computes the Frame. Check Sequence (FCS) before sending the frame. over the trunk link. At the receiving end, the tag is removed and the frame. is forwarded to the assigned VLAN. 802.1Q does not tag frames on the native VLAN.

It tags all other frames transmitted and received on the trunk. While configuring a 802.1 trunk, you must make sure that the same native VLAN is configured on both sides of the trunk. IEEE 802.1Q defines a single instance of spanning tree running on the native VLAN for all the VLANs in the network which is called Mono Spanning Tree (MST). This lacks the flexibility and load balancing capability of PVST available with ISL. However, PVST+ offers the capability to retain multiple Spanning Tree topologies with 802.1Q trunking.
更多“Which encapsulation types are configurable on a Cisco switch for a trunk? (Select two answer choices)A. VTPB. ISLC. CDPD. 802.1QE. 802.1pF. LLCG. IETF”相关问题

  • 第1题：

    What must the Ezonexam network administrator do in order to successfully configure a VLAN trunk between two switches named VE1 and VE2? (Select two answer choices)

    A. Set each end of the trunk line to IEEE 802.1Q encapsulation.

    B. Set the same VTP management domain name on both switches.

    C. Set all ports on the two switched as access ports.

    D. Configure one of the two switches as a VTP server.

    E. Connect the two switches using a rollover cable.

    F. Use a router to forward VTP traffic between the VLANs.


    正确答案：BD
    B,D 解析：Explanation:
    All servers that need to share VLAN information must use the same domain name, and a switch can only be in one domain at a time. This means that a switch can only share VTP domain information with other switches if they're configured into the same VTP domain. You can use a VTP domain if you have more than one switch connected in a network, but if you've got all your switches in only one VLAN, you don't need to use VTP. VTP information is sent between switches via a trunk port.

    Switches advertise VTP management domain information, as well as a configuration revision number and all known VLANs with any specific parameters. There's also something called VTP transparent mode, in it, you can configure switches to forward VTP information through trunk ports, but not to accept information updates or update their VTP databases. At least one of the switches will need to be configured as the VTP server in order to pass the VLAN info.

    Incorrect Answers:
    A. Although this is a valid option, it is not a requirement since using ISL as the encapsulation type is also a valid option.

    E. A rollover cable is not used between switches for any of the port types.

    F. Routers will be required for sending traffic from one VLAN to the other, but not to forward the actual VTP traffic.

  • 第2题：

    Which of the following are VLAN frame. encapsulation types that may be configured on a Catalyst switch? (Choose two.)

    A. VTP

    B. ISL

    C. CDP

    D. 802.1Q

    E. 802.1p

    F. LLC


    正确答案：BD
    B,D 解析：Explanation:
    The two VLAN trunking encapsulation types are:
    Inter-Switch Link (ISL): This is proprietary to Cisco switches, and it's used for Fast Ethernet and Gigabit Ethernet links only. ISL routing can be used on a switch port, router interfaces, and server interface cards to trunk a server. ISL lets you explicitly tag VLAN information onto an Ethernet frame. This tagging information allows VLANs to be multiplexed over a trunk link through an external encapsulation method, which allows the switch to identify the VLAN membership of a frame. over the trunked link.

    IEEE 802.1Q: Created by the IEEE as a standard method of frame. tagging, this actually inserts a field into the frame. to identify the VLAN. If you're trunking between a Cisco switched link and a different brand of switch, you have to use 802.1Q for the trunk to work.

  • 第3题：

    You are bringing up a new Ezonexam switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method. When setting the encapsulation type on the trunk, what should you configure on the Cisco switch?

    A．Switch(config)# switchport trunk encapsulation isl

    B．Switch(config)# switchport trunk encapsulation ietf

    C．Switch(config-if)# switchport trunk encapsulation isl

    D．Switch(config-if)# switchport trunk encapsulation ietf

    E．Switch(config-if)# switchport trunk encapsulation dot1q


    正确答案：E
    解析：Explanation:
    The only real choices for setting up switching trunks are ISL and 802.1Q. ISL is Cisco proprietary, while 802.1Q uses the IEEE defined standard for trunking between switches.

    To configure the 802.1Q standard, the keyword "dot1q" is used in Cisco switches.

    Incorrect Answers:
    A, B, D. These are not valid options in a Cisco switch.

    C. ISL is a Cisco proprietary method for setting up trunks, and will only work between Cisco switches.

  • 第4题：

    You are bringing up a new Cisco Catalyst switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method.When setting the encapsulation type on the trunk, what should you configure on the Cisco switch?（）

    A. Switch(config)# switchport trunk encapsulation isl

    B. Switch(config)# switchport trunk encapsulation ietf

    C. Switch(config-if)# switchport trunk encapsulation isl

    D. Switch(config-if)# switchport trunk encapsulation ietf

    E. Switch(config-if)# switchport trunk encapsulation dot1q


    参考答案：E

  • 第5题：

    能够在CiscoIOS软件中正确地将端口配置为ISL封装的命令是（）。

    • A、Switch(config-if)#switchport mode trunk isl
    • B、Switch(config-if)#switchport mode encapsulation isl
    • C、Switch(config-if)#switchport trunk encapsulation isl
    • D、Switch(config-if)#switchport mode trunk encapsulation isl

    正确答案:C

  • 第6题：

    Which encapsulation types are configurable on a Cisco switch for a trunk?（）

    • A、VTP
    • B、ISL
    • C、CDP
    • D、802.1Q
    • E、802.1p
    • F、LLC
    • G、IETF

    正确答案:B,D

  • 第7题：

    Customer X has a hub-and-spoke Frame Relay network， with a central office and two branch offices （RemoteA and RemoteB）. Each location has only one physical link to the Frame Relay cloud and RemoteB has a router that is not a Cisco router. Since the installation， there is no connectivity between RemoteB and the central office. What is a possible solution to this issue？ （）

    • A、 Because Frame Relay IETF encapsulation is only configurable at interface level， you must use IETF encapsulation on all routers.
    • B、 This is not a possible scenario. A dedicated Frame Relay link to RemoteB is mandatory at the central office.
    • C、 The router at RemoteB must be replaced by a Cisco router.
    • D、 Use Frame Relay IETF encapsulation on a per-VC basis on the central office router.
    • E、 There is a problem in the Frame Relay cloud， because Cisco routers are compatible with IETF Frame Relay.

    正确答案:D

  • 第8题：

    Which two commands can be used to verify a trunk link configurationt status on a given cisco switch?（）

    • A、show interfaces interface
    • B、show interfaces interface trunk
    • C、show interfaces interface switchport
    • D、show ip interface brief
    • E、show interfaces vlan

    正确答案:B,C

  • 第9题：

    多选题
    Which two commands can be used to verify a trunk link configuration status on a given cisco switch?（）
    A

    show interfaces interface

    B

    show interfaces trunk

    C

    show interfaces switchport

    D

    show ip interface brief

    E

    show interfaces vlan


    正确答案： B,C
    解析： 暂无解析

  • 第10题：

    单选题
    You need to configure a new Company switch for trunking.  Which switch command enables a  trunking protocol that appends a four byte CRC to the packet？（）
    A

     CompanySwitch（config-if）#switchport trunk encapsulation dot1q

    B

     CompanySwitch（config-if）#switchport trunk encapsulation itef

    C

     CompanySwitch（config-if）#switchport trunk encapsulation fddi

    D

     CompanySwitch（config-if）#switchport trunk encapsulation isl

    E

     None of the other alternatives apply


    正确答案： C
    解析： 暂无解析

  • 第11题：

    多选题
    Which encapsulation types are configurable on a Cisco switch for a trunk?（）
    A

    VTP

    B

    ISL

    C

    CDP

    D

    802.1Q

    E

    802.1p

    F

    LLC

    G

    IETF


    正确答案： E,G
    解析： 暂无解析

  • 第12题：

    单选题
    Customer X has a hub-and-spoke Frame Relay network， with a central office and two branch offices （RemoteA and RemoteB）. Each location has only one physical link to the Frame Relay cloud and RemoteB has a router that is not a Cisco router. Since the installation， there is no connectivity between RemoteB and the central office. What is a possible solution to this issue？ （）
    A

     Because Frame Relay IETF encapsulation is only configurable at interface level， you must use IETF encapsulation on all routers.

    B

     This is not a possible scenario. A dedicated Frame Relay link to RemoteB is mandatory at the central office.

    C

     The router at RemoteB must be replaced by a Cisco router.

    D

     Use Frame Relay IETF encapsulation on a per-VC basis on the central office router.

    E

     There is a problem in the Frame Relay cloud， because Cisco routers are compatible with IETF Frame Relay.


    正确答案： C
    解析： 暂无解析

  • 第13题：

    Which of following VLAN frame. encapsulation types are configurable on a Cisco switch? (Select two answer choices.)

    A. VTP

    B. 802.1Q

    C. LLC

    D. ISL

    E. CDP

    F. PAP


    正确答案：BD
    B,D 解析：Explanation:
    ISL and 802.1Q are the two trunking encapsulations that can be configured on a Cisco switch. ISL is Cisco proprietary and 802.1Q is the IEEE standard method.

    Incorrect Answers:
    A. VTP is the VLAN Trunking Protocol, which is used to carry VLAN information across the trunks. The question is asking for the encapsulation options for the trunk, which will be used by VTP.

    C. LLC is the Logical Link Control, which is a sub-layer of the data link layer.

    E. CDP is the Cisco Discovery Protocol, which is used by Cisco devices to discover information on neighboring Cisco devices.

    F. PAP is the Password Authentication Protocol, which is used as an authentication mechanism on PPP links.

  • 第14题：

    Which two of the following values does STP take into consideration when it elects the root bridge? (Select two answer choices)

    A. The BPDU version number

    B. The access layer bridge setting

    C. The Bridge ID

    D. The spanning-tree update number

    E. The bridge priority

    F. The VLAN number


    正确答案：CE
    C,E 解析：Explanation:
    The bridges elect a root bridge based on the bridge IDs in the BPDUs. The root bridge is the bridge with the lowest numeric value for the bridge ID. Because the two part bridge ID starts with the priority value, essentially the bridge with the lowest priority becomes the root.

    For instance, if one bridge has priority 100, and another bridge has priority 200, the bridge with priority 100 wins, regardless of what MAC address was used to create the bridge ID or each bridge/switch.

  • 第15题：

    Which commands, when used together, would create an 802.1Q link?()

    A. Switch(vlan)# mode trunk

    B. Switch(config)# switchport access mode trunk

    C. Switch(config-if)# switchport mode trunk

    D. Switch(config-if)# switchport trunk encapsulation dot1q

    E. Switch(config)# switchport access mode 1

    F. Switch(vlan)# trunk encapsulation dot1q


    参考答案：C, D

  • 第16题：

    Which commands, when used together, would create an 802.1Q link?（）

    • A、Switch(vlan)# mode trunk
    • B、Switch(config)# switchport access mode trunk
    • C、Switch(config-if)# switchport mode trunk
    • D、Switch(config-if)# switchport trunk encapsulation dot1q
    • E、Switch(config)# switchport access mode 1
    • F、Switch(vlan)# trunk encapsulation dot1q

    正确答案:C,D

  • 第17题：

    Which of following VLAN frame encapsulation types are configurable on a Cisco switch?（）

    • A、VTP
    • B、802.1Q
    • C、LLC
    • D、ISL
    • E、CDP
    • F、PAP

    正确答案:B,D

  • 第18题：

    You are bringing up a new Cisco Catalyst switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method. When setting the encapsulation type on the trunk, what should you configure on the Cisco switch?（）

    • A、Switch(config)# switchport trunk encapsulation isl
    • B、Switch(config)# switchport trunk encapsulation ietf
    • C、Switch(config-if)# switchport trunk encapsulation isl
    • D、Switch(config-if)# switchport trunk encapsulation ietf
    • E、Switch(config-if)# switchport trunk encapsulation dot1q

    正确答案:E

  • 第19题：

    Which two commands can be used to verify a trunk link configuration status on a given cisco switch?（）

    • A、show interfaces interface
    • B、show interfaces trunk
    • C、show interfaces switchport
    • D、show ip interface brief
    • E、show interfaces vlan

    正确答案:B,C

  • 第20题：

    You need to configure a new Company switch for trunking.  Which switch command enables a  trunking protocol that appends a four byte CRC to the packet？（）

    • A、 CompanySwitch（config-if）#switchport trunk encapsulation dot1q
    • B、 CompanySwitch（config-if）#switchport trunk encapsulation itef
    • C、 CompanySwitch（config-if）#switchport trunk encapsulation fddi
    • D、 CompanySwitch（config-if）#switchport trunk encapsulation isl
    • E、 None of the other alternatives apply

    正确答案:D

  • 第21题：

    单选题
    You are bringing up a new Cisco Catalyst switch, and wish to connect it via a trunk to another switch from a different vendor, which uses the IEEE standard for the trunking method. When setting the encapsulation type on the trunk, what should you configure on the Cisco switch?（）
    A

    Switch(config)# switchport trunk encapsulation isl

    B

    Switch(config)# switchport trunk encapsulation ietf

    C

    Switch(config-if)# switchport trunk encapsulation isl

    D

    Switch(config-if)# switchport trunk encapsulation ietf

    E

    Switch(config-if)# switchport trunk encapsulation dot1q


    正确答案： A
    解析： 暂无解析

  • 第22题：

    多选题
    Which of following VLAN frame encapsulation types are configurable on a Cisco switch?（）
    A

    VTP

    B

    802.1Q

    C

    LLC

    D

    ISL

    E

    CDP

    F

    PAP


    正确答案： B,F
    解析： 暂无解析

  • 第23题：

    多选题
    Which two commands can be used to verify a trunk link configurationt status on a given cisco switch？（）
    A

    show interfaces interface

    B

    show interfaces interface trunk

    C

    show interfaces interface switchport

    D

    show ip interface brief

    E

    show interfaces vlan


    正确答案： E,A
    解析： 暂无解析

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