當前位置: 首頁 > 問題分類 > 計算機類考試 > 思科認證 > 問題詳情
問題

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.

參考答案
正確答案: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.
您可能感興趣的試題
  • 以下不屬于動態路由協議的是()

    A.RIP

    B.ICMP

    C.IS-IS

    D.OSPf

  • 關于RIP協議描述正確的是()。

    A.距離矢量路由協議

    B.鏈路狀態路由協議

    C.有RIPv1和RIPv2兩個版本

    D.都使用廣播發送,支持驗證和VLSM

  • OSPF協議生成的路由分為四類,按優先級從高到低順序來說分別是:區域內路由、區域間路由、第一類外部路由、第二類外部路由。

    此題為判斷題(對,錯)。

  • How can a Ezonexam administrator determine if a router has been configured when it is first powered up?

    A.A configured router prompts for a password

    B.A configured router goes to the privileged mode prompt

    C.An un configured router goes into the setup dialog

    D.An un configured router goes to the enable mode prompt

×
驗證
新疆十一选五和值表