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Three switches are connected to one anther via trunk ports.A

题目
单选题
Three switches are connected to one anther via trunk ports.Assuming the default switch configuration,which switch is elected as the root bridge for the spanning-tree instance of vlan 1?（）
A

the switch with the lowest MAC address

B

the switch with the higest MAC address

C

the switch witch the higest IP address

D

the switch with the lowest IP address

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相似问题和答案

第1题：

What must an administrator do in order to successfully configure a VLAN trunk between two switches?()

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.


参考答案：B, D

第2题：

Two switches are connected through a trunk link.which two commands show that there is a native VLAN mismatch on that link?()

A.show interfaces interface

B.show vlan bri

C.show interfaces interface switchport

D.show interface interface trunk

E.show interfaces vlan


参考答案：C, D

第3题：

There are 2 switches in the Ezonexam LAN, with no routers. Ports 1, 2 & 3 are assigned to VLAN 1 in switch 1 and 2 and ports 4, 5 & 6 are assigned to VLAN 2 in both switches. These two switches are connected together via a trunked link. Which of the conditions below would verify trunk and VLAN operation? (Select all valid answers)

A．Host 1 on VLAN 1 can ping Host 2 on VLAN 1

B．Host 1 on VLAN 1 can ping Host 4 on VLAN 2

C．Host 1 on VLAN 1 can not ping Host 2 on VLAN 1

D．Host 4 on VLAN 2 can not ping Host 1 on VLAN 1

E．Host 4 on VLAN 2 can ping Host 2 on VLAN 2


正确答案：ADE
解析：Explanation:
If there is no router present, only hosts in the same VLAN will be able to ping each other. In order for any host on one VLAN to communicate with a host on another VLAN, the traffic must pass through a router. Host within the same VLAN will be able to ping each other, even though they reside on different switches, as long as the switches have a trunk connection configured between them.

第4题：

Two Company switches are connected via a trunk link. In this network， 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.  This  describes which technology？（）

  • A、 DISL
  • B、 ISL
  • C、 DTP
  • D、 IEEE 802.1Q
  • E、 MPLS
  • F、 None of the other alternatives apply

正确答案:B

第5题：

To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus？（）

  • A、 to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 link
  • B、 to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 link
  • C、 to two core switches from redundant distribution switches connected with Layer 2 link
  • D、 to two core switches from redundant distribution switches connected with Layer 3 link
  • E、 to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO

正确答案:D

第6题：

To which switch or switches should you provide redundant links in order to achieve high availability with reliable fast convergence in the enterprise campus?()

A. to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 2 link

B. to a core switch running Cisco NSF and SSO from redundant distribution switches connected with a Layer 3 link

C. to two core switches from redundant distribution switches connected with a Layer 2 link

D. to two core switches from redundant distribution switches connected with a Layer 3 link

E. to two core switches running Cisco NSF and SSO from two redundant distribution switches running Cisco NSF and SSO


参考答案：D

第7题：

A user works daily with video production and needs portable storage which will allow them to transport their work back and forth from home. Taking the users storage and bandwidth requirements into consideration, which of the following would BEST suit the users needs?（）

  • A、An external hard drive connected via eSATA
  • B、An external hard drive connected via USB 2.0
  • C、An external hard drive connected via serial
  • D、A thumb drive connected via USB 2.0

正确答案:A

第8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9题：

In which of the following scenarios would the "show cdp neighbors detail"command be an appropriate troubleshooting tool?（）

  • A、Two switches are connected via a trunk. Both switches have been assigned an IP address, subnet mask, and default gateway. A ping is successful between the two switches. However, VLAN information is not passed from one switch to the other switch.
  • B、A router and a switch have been assigned an IP address, a subnet mask, and a default gateway. They are directly connected, but a ping between the two devices fails.
  • C、A router connects to another router through a serial interface. Both routers have been assigned an IP address, subnet mask, and default gateway. The routers are running RIP and the networks directly connected to the first router do not pass to the second router. However, a ping from one router to the serial interface of the directly connected neighboring router is successful.
  • D、A router connects to another router via a switch. Both routers and the switch have been assigned an IP address, subnet mask, and default gateway. Neither the routers nor the switch are able to ping one of the hosts that is directly to the switch.

正确答案:B

第10题：

The DAI feature has been implemented in the Company switched LAN.  Which three statements  are true about the dynamic ARP inspection （DAI） feature？ （）

  • A、 DAI can be performed on ingress ports only.
  • B、 DAI can be performed on both ingress and egress ports.
  • C、 DAI is supported on access ports， trunk ports， EtherChannel ports， and private VLAN ports.  
  • D、 DAI should be enabled on the root switch for particular VLANs only in order to secure the ARP  caches of hosts in the domain.
  • E、 DAI should be configured on all access switch ports as untrusted and on all switch ports connected to other switches as trusted.
  • F、 DAI is supported on access and trunk ports only.

正确答案:A,C,E

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