Question: What Is Difference Between Layer 2 And Layer 3 Switch?

Is VLAN a Layer 2?

A virtual LAN (VLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2).

LAN is the abbreviation for local area network and in this context virtual refers to a physical object recreated and altered by additional logic..

What is difference between layer 3 switch and router?

The key difference between Layer 3 switches and routers lies in the hardware technology used to build the unit. … Designed for use within local networks, a Layer 3 switch will typically not possess the WAN ports and wide area network features a traditional router will always have.

What is the difference between Layer 2 switch and router?

Layer 2 Switch Vs Router A switch learns all the MAC addresses of all the hosts connected to it in order to pass traffic between hosts in Layer 2. Routers on the other hand allow us the ability to take different networks and pass traffic to one another in Layer 3.

What is Layer 2 and Layer 3 VLAN?

I answered them, Layer 2 VLAN is a single broadcast domain. It works on layer 2 (Datalink Layer). They can communicate only within it. And L3 VLAN is an Interface, that works on Network Layer. In order to do inter VLAN routing/ communication we need L3 interface (SVI).

Is Layer 2 or Layer 3 better?

The main difference between Layer 2 and Layer 3 is the routing function. … That means, a Layer 3 switch has both MAC address table and IP routing table, and handles intra-VLAN communication and packets routing between different VLANs as well. A switch that adds only static routing is known as a Layer 2+ or Layer 3 Lite.

What does Layer 3 Switch mean?

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.

Can a Layer 3 switch replace a router?

All in all, it is not recommended to replace a router with layer 3 switch, but you can apply them in the same network at the same time. … However, those switches are costly, and most layer 3 switches just have Ethernet ports. In this way, a dedicated router is cost-effective than a layer 3 switch.

Can a Layer 3 switch act as a router?

A layer 3 switch is both a switch and a router: it can be regarded as a router with multiple Ethernet ports and with switching function. … Layer 3 switches are thus able to segregate ports into separate VLANs and perform the routing between them.

Is it better to use a switch or a router?

Comparing an Ethernet Switch vs. Router. While a network switch can connect multiple devices and networks to expand the LAN, a router will allow you to share a single IP address among multiple network devices. … If you have the need for more connections, an Ethernet switch may be a better option over a hub.