VLAN Overview Description

Latest reply: Dec 3, 2018 13:45:19 217 4 11 1

VLAN Overview

Definition

Virtual Local Area Network (VLAN) technology divides a physical LAN into multiple broadcast domains, each of which is called a VLAN. Hosts within a VLAN can communicate with each other but cannot communicate directly with hosts in other VLANs. Therefore, broadcast packets are confined to within a single VLAN.

Purpose

Ethernet technology allows data communication over shared media through Carrier Sense Multiple Access/Collision Detection (CSMA/CD). When an Ethernet network has a large number of hosts, collision becomes a serious problem and can lead to broadcast storms. This can degrade network performance or even result a complete breakdown. Using switches to connect LANs can mitigate collisions, but cannot isolate broadcast packets or improve network quality.

VLAN technology divides a physical LAN into multiple VLANs to isolate broadcast domains. Hosts within a VLAN can only directly communicate with hosts in the same VLAN. They must use a router to communicate with hosts in other VLANs.

Figure 1 VLAN networking
fig_dc_fd_vlan_000201.png
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Tanzania163 Created Dec 3, 2018 14:05:51
useful for learning  
Created Dec 3, 2018 09:24:48 Helpful(1) Helpful(1)

VLAN Overview Description-2812835-1
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Created Dec 3, 2018 09:40:43 Helpful(0) Helpful(0)

Can you sent more IT basic skills?we want know more That's great ! ths for your share
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Created Dec 3, 2018 13:45:19 Helpful(0) Helpful(0)

Can you introduce VXLAN?
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