Network Switch-Its Different Layers,Advantages & Disadvantages

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This PPT describes about Network Switch.For more information visit http://www.shopricom.com/J8706A/HP-ProCurve-Switch-zl-2 4-Port-Mini-GBIC-Module

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Network Switch : Its Different Layers,Advantages and Disadvantages: 

Network Switch : Its Different Layers,Advantages and Disadvantages

Network Switch: 

Network Switch A network switch can be defined as the device that connects the network devices or network segments. It is the telecommunication device that receives messages and then sends them only to the targeted receivers, unlike hub which transmits to all the network devices. The switches can perform in different layers. One of the examples of switch can be HP GBICs

Different Layers Of Switch: 

Different Layers Of Switch Layer 1 : In this layer the switch performs the function which is called as Port mirroring. This helps to send network packets from one switch port to another switch ports.

Different Layers Of Switch: 

Different Layers Of Switch Layer 2 :In this layer, the network switch performs bridging .Bridging can be done in different ways like Storing and then forwarding. In this process the switch verifies the frames before it sends them. Bridging can be also done by Cutting through, where no error checking process takes place. Another way can be fragment free bridging, where the errors of the actual data is being checked by the end devices.

Different Layers Of Switch: 

Different Layers Of Switch Layer 3 :In this layer, the functions are mainly done by a Router .In this layer the Switch can increase their efficiency by delivering more traffic.

Different Layers Of Switch: 

Different Layers Of Switch Layer 4 : This layer is basically vendor dependent. It may contain firewall, VPN concentrator and IP Security Gateway .

Different Layers Of Switch: 

Different Layers Of Switch Layer 7 : This layer distributes loads through the URL (Uniform Resource Locator) and includes web cache and can take part in a content delivery network .

Advantages Of Network Switch: 

Advantages Of Network Switch The number of broadcast domains gets decreased. Unlike hub, switches are more hardware oriented. It can make use of CAM table for port to Mac Mapping. Unlike Routers, multi ports of switches are available in lower cost. It helps in logical segmentation by supporting VLan.

Disadvantages Of Network Switch: 

Disadvantages Of Network Switch Sometimes, if switches are in Promiscuous mode they are vulnerable to security attacks like spoofing IP address or capturing of Ethernet Frames. Proper designing and configuration is required if multicast packets are being handled. While limiting broadcasts, switches are not as good as routers.

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