分析VLAN技术概念及划分方法

分析VLAN技术概念及划分方法

一、VLAN技能概述

A, VLAN skills summary

VLAN(Virtual Local Area Network)也就是虚拟局域网，是一种建立在交流技能根底之上的，经过将局域网内的机器设备逻辑地而不是物理地区分红一个个不一样的网段，以软件办法完成逻辑作业组的区分与办理的技能。VLAN的作用是使得同一VLAN中的成员间能够彼此通讯，而不一样VLAN之间则是彼此阻隔的，不一样的VLAN间的若是要通讯就要经过必要的路由设备。

VLAN ( Virtual Local Area Network ) is a virtual local area network, is a kind of built on the foundation of communication skills, after the equipment will be LAN logical rather than physical area into a different network segment, complete the distinction between logical operations group in software way and management skills. The role of VLAN is to make the members in the same VLAN can communicate with each other, and not the same between VLAN is another barrier, not the same between VLAN

if communication is about to pass routing equipment necessary.

二、 VLAN的长处

Two, the strengths of VLAN

（一）能够操控网络播送

( a ) to be able to control the network broadcast 在没有运用VLAN技能的局域网内的整个网络都是播送域，这样就使得网内的一台设备宣布网络播送时，在局域网内的任何一台设备的接口都能接收到播送，因而当网络内的设备越来越多时，网络上的播送也就越来越多，占用的时刻和资源也就越来越多，当播送多到必定的数量时，就会影响到正常的信息的传送。这样就能致使信息推迟，严峻的能够形成网络的瘫痪、阻塞，严峻的影响了正常的网络运用，这就是所谓的网络风暴。

In the absence of the use of VLAN skills LAN the entire network are broadcast domain, which makes a device within the network announced that the network broadcast, any equipment in the LAN interface can receive the broadcast, so when the equipment more and more within the network, the

network is more and more. Take time and resources, also more and more, when the broadcast to certain quantity, delivery will affect the normal information. This can cause information delay, serious can block paralysis, forming network, serious influence the network using the normal, it is called the network storm.

在运用了VLAN技能的局域网中，缩小了播送的播送域，在一个VLAN中的播送风暴也不会影响到其他的VLAN，然后有效地削减了播送风暴对局域网网络的影响。

In the use of the VLAN technology in LAN, reduce the broadcast broadcast domain, in a VLAN broadcast storm will not affect the other VLAN, and effectively reduce the influence of LAN network broadcast storm.

（二）增强了网络的安全性

( two ) and improve the security of the network 在局域网中运用VLAN技能能够把彼此通讯比拟频频的用户区分到同一个VLAN中，这样在同一个作业组中的信息传输只在同一个组内播送，然后也减轻了因播送包被截获而致使的信息走漏，增强了网络的安全性。

The use of VLAN skills to communicate with each other more frequently users distinguish to the same VLAN in the LAN, so that in the same working group in the transmission of information is sent only in the same group, and also reduce the leakage causes for broadcast packets intercepted information, enhance network security.

（三）简化网络办理员的办理作业

( three ) operation for simplified network administrator.

在运用VLAN技能后网络办理员就能够轻松的办理网络，灵敏构建虚拟作业组。用VLAN能够区分不一样的用户到不一样的作业组，同一作业组的用户也不用局限于某一固定的物理规划，网络构建和保护更便利灵敏。Network management can easily in the use of VLAN technology network administrator, sensitive to construct virtual working group. To distinguish between different users to the working group is not the same with VLAN, the same work group of users is not limited to a fixed physical planning, network