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Difference Between Layer 2 And Layer 3

 

The Main Difference Between Layer 2 And Layer 3 Switches Is That Layer 2 Switches Only Operate At The Data Link Layer (Layer 2) Of The OSI Model,

While Layer 3 Switches Operate At Both The Data Link Layer And The Network Layer (Layer 3) Of The OSI Model.

Layer 2 Switches Forward Data Frames Based On The MAC Addresses Of The Source And Destination Devices. They Do Not Look At The IP Addresses Of The Devices.

Layer 3 Switches, On The Other Hand, Forward Data Packets Based On The IP Addresses Of The Source And Destination Devices. They Can Also Route Traffic Between Different Networks.

Advantages Of Layer 2 Switches:

Less Expensive

Easier To Configure

More Widely Available

Disadvantages Of Layer 2 Switches:

Not As Scalable As Layer 3 Switches

Cannot Route Traffic Between Different Networks

Advantages Of Layer 3 Switches:

More Scalable

Can Route Traffic Between Different Networks

More Secure

Disadvantages Of Layer 3 Switches:

More Expensive

More Complex To Configure

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