Cisco Switch L2

Switch is a Network Device it works in Layer 2(L2) - Data Link Layer. Normally two Types of Network Switches

1. Unmanaged Switch


2. Managed Switch

UNMANAGED SWITCH

Normally Unmanaged Switches use Application-Specific-Integrated Circuits (ASIC's) to build and maintain filter tables

It Provides

1. Hardware-based bridging


2. Wire speed


3. Low latency


4. Low cost

Manufacturer of  Unmanaged Switches

*Cisco Small Business 100 Series Unmanaged Switches

*Netgear

*Dax

*Enter

*Tech-com

*Nortel

MANAGED SWITCHES

Managed Switches use Cisco IOS Internetwork Operating System to build and maintain MAC address tables

Layer 2 filtering based on Destination MAC addresses and Source Address table

One collision domain per port

One broadcast domain across all switches

Asymmetric ports:  10 Mbps and 100 Mbps

Full-duplex ports

Half duplex - Only one station can send or receive at any one time

Full duplex - allows transmission and reception at the same time

Switching Modes

• Store and Forward


• Cut through

Store and Forward

• Entire frame is received before forwarding, The Frame is Stored in Switch.

• High Error detection


• Low latency

Cut Through

Here Its two types (1)Fast Forward (2)Fragment Free

Fast Forward

Forwards frame as soon as after receiving destination address

Fragment Free

Filters out collision packets If packet data > 64bytes

Ethernet frame maximum size = 1518bytes

Ethernet frame minimum size = 64 bytes

Manufacturer of  Managed Switches

* Cisco

*Nortel

*Juniper

Difference Between Switch and Hub

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