Cisco Layer 3 Switch Overview and Basic Configuration

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Cisco Layer 3 Switch is used at distribution layer. There is a ton of confusion about the use of a layer 3 switch because in a traditional setup, routers operate at layer 2 of the OSI model while switches operate at layer In other words, one VLAN will be associated with one switch and can’t be used on other switches.

A Layer 3 switch is a specialized hardware device used in network routing. ... Both can support the same routing protocols, inspect incoming packets and make dynamic routing decisions based on the source and destination addresses inside.

What is the difference between a Layer 2 switch and a layer 3 switch?
Simply put, a layer 3 switch can forward packets between different networks like a router while layer 2 switches forward packets to different segments/or within a given network.

Why use a Layer 3 switch?
Layer 3 switches make the use of virtual local area networks (VLANs) and interVLAN routing easier and faster. They make VLANs easier to configure, because a separate router isn't required between each VLAN; all the routing can be done right on the switch.

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