![]() ![]() This switch can create VLANs and route VLANs as well as changing routing paths based on protocol metrics like cost (distance) and load (traffic). ![]() Layer 3 LAN switching (元) (adds intelligence)Ī layer 3 switch is a switch that makes routing decisions based on Layer 3 addresses, also known as IP addresses, and simple routing protocols like RIP and IGRP. Layer 2 switches have limitations, such as the switch remains as one large broadcast domain, and only switches MAC addresses. One way to compare a layer 2 switch is a multiport bridge. Layer 2 has (ASICs) application-specific integrated circuits, used to build and maintain MAC address tables for forwarding. It simply keeps track of which MAC addresses are on which ports and forwards the packets appropriately. Layer 2 switching is hardware-based switching.Ī layer 2 switch is often called a dumb switch as it maintains little intelligence. Layer 2 switching uses the (MAC address) of the host (NIC) network interface card to decide where to forward the frames. ![]() The term layer 2 switch is a switch that forwards packets based on MAC addresses. Layer 2, and 3 refer to the layers of the OSI model, but it doesn’t fully explain the functional differences. If you aren’t familiar with the OSI model you can research it on your own. Without going too deep into technical terms, this graphic is designed to give an overview of basic Layer 2 and 3 LAN switching. LAN Switching – Layer 2, Layer 3, Light Layer 3 ![]()
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