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In a switched environment, what

题目

In a switched environment, what does the IEEE 802.1Q standard describe?（）

  • A、the operation of VTP
  • B、a method of VLAN trunking
  • C、an approach to wireless LAN communication
  • D、the process for root bridge selection
  • E、VLAN pruning vlan
参考答案和解析
正确答案:B
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相似问题和答案

第1题：

What is the best way to make use of the natural resources ____ damaging the environment?

A: without

B: with

C: by

D: in


参考答案：D

第2题：

What is a Label－Switched Path?()

A. a traffic engineered path

B. another name for a Frame Relay PVC

C. a bidirectional path through a network

D. a unidirectional path through a network


参考答案：D

第3题：

Tom started as an engineering student, but he ________ English because he liked it.

A. switched off

B. switched on

C. switched on to

D. switched to


参考答案：D

第4题：

What are two benefits of using VTP in a switching environment?（）

  • A、It allows switches to read frame tags.
  • B、It allows ports to be assigned to VLANs automatically.
  • C、It maintains VLAN consistency across a switched network.
  • D、It allows frames from multiple VLANs to use a single interface.
  • E、It allows VLAN information to be automatically propagated throughout the switching environment.

正确答案:C,E

第5题：

In a switched environment, what does the IEEE 802.1Q standard describe?()

A.the operation of VTP

B.a method of VLAN trunking

C.an approach to wireless LAN communication

D.the process for root bridge selection

E.VLAN pruning vlan


参考答案：B

第6题：

In the Ezonexam switched LAN environment, what does the IEEE 802.1Q standard describe?

A. VLAN pruning

B. A method of VLAN trunking

C. An approach to wireless LAN communication

D. The operation of VTP

E. The process for root bridge selection

F. None of the above


正确答案：B
B 解析：Explanation:
A broadcast domain must sometimes exist on more than one switch in the network. To accomplish this, one switch must send frames to another switch and indicate which VLAN a particular frame. belongs to. On Cisco switches, a trunk link is created to accomplish this VLAN identification. ISL and IEEE 802.1Q are different methods of putting a VLAN identifier in a Layer 2 frame.

The IEEE 802.1Q protocol interconnects VLANs between multiple switches, routers, and servers. With 802.1Q, a network administrator can define a VLAN topology to span multiple physical devices. Cisco switches support IEEE 802.1Q for FastEthernet and Gigabit Ethernet interfaces. An 802.1Q trunk link provides VLAN identification by adding a 4-byte tag to an Ethernet Frame. as it leaves a trunk port.

第7题：

Inordertoincreasereliability,minimizecollisionsandestablishalargenumberofsystemsonanEthernetsegment,whichofthefollowingoptionsshouldbeselectedfortheEthernetnetwork?()

A.10BaseT

B.Switched10BaseT

C.Switched100BaseTHalf-Duplex

D.Switched100BaseTFull-Duplex


参考答案：D

第8题：

You need to decide on which trunking method to implement in the Ezonexam network. What is a characteristic of ISL and 802.1q frame. tagging in a switched LAN environment?

A．They are used to find the best path through a network.

B．They allow the exchange of filtering tables.

C．They specify different implementations of the Spanning-Tree Protocol.

D．They allow the exchange of routing tables

E．They provide inter-switch VLAN communication.


正确答案：E
解析：Explanation: A trunk link is the other type of Layer 2 port supported on Cisco switches. When a trunk port is configured, it begins marking frames as they exit the port to indicate which VLAN each frame. is associated with.

The trunk port can also read the markings, called tags, as they enter the trunk port. This enables the switch to send a frame. only to the ports for the given VLAN associated with the incoming frame. The main purpose of trunking is to carry traffic between switches and maintain the VLAN information.

Unlike an access link, the trunk link does not belong to a single VLAN but instead can carry traffic from several VLANs over a point-to-point link between two devices that understand the protocol. Two forms of trunking are used for Cisco switches on Ethernet networks: An IEEE industry standard called IEEE 802.1Q.

This is a frame-tagging mechanism that adds a VLAN identifier to the frame. by inserting a tag at Layer 2. Another form. of trunking on Cisco switches is called Inter-Switch Link (ISL), which is a Cisco proprietary trunking mechanism. ISL uses a frame. encapsulation method that adds a header to identify the VLAN.

Incorrect Answers:
A, D. These are the functions of routers, not switches.

B. Filtering tables can be used on certain Catalyst switches via the use of VLAN access control lists, but this information is never shared between switches.

C. A separate STP instance is created for each VLAN, but the STP implementation remains the same.

第9题：

On a multicast environment， what is process for installing and run an application on host？


正确答案:IGMP

第10题：

What is the purpose of the spanning-tree algorithm in a switched LAN?（）

  • A、To provide a monitoring mechanism for networks in switched environments.
  • B、To manage VLANs across multiple switches.
  • C、To prevent switching loops in networks with redundant switched paths.
  • D、To segment a network into multiple collision domains.
  • E、To prevent routing loops in networks.

正确答案:C

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