Now that we have discussed the benefits of segmenting the LAN and using switches or bridges to do so, let’s look at a layer 3 solution using routers to segment the network into smaller LANs.

Critical Information

Routers are a very expensive way of segmenting your LAN into smaller networks. When you look at larger networks that need segmenting, you need to look at the per-port costs, and routers cost the most. However, they are a great way of segmenting your network because every port is not only its own broadcast domain and its own collision domain, but it is also its own network.

Multilayer switches using virtual local area networks (VLANs) provide the best and most manageable solution. A logical grouping of users allows easier network
management. Not only that, but to move users or create new networks, it is not necessary to run new cables or add new hardware. It is merely a configuration change on the switch. And the per-port costs in large networks are the lowest compared to all the other methods. Communication between each VLAN (network) needs a router, which is usually built in or comes as a module on Cisco multilayer switches.

There are several benefits to segmenting the LAN with a router. One of the biggest is that routers do not forward broadcasts and multicasts by default. Another reason is that distance limitations can be overcome because each segment can be created using the maximum distance allowable by the cable type being used. Additionally, routers can translate between multiple media types, while switches cannot. Finally, routers provide better manageability of the routing process, which allows you to configure the data paths used when there are redundant links.

Exam Essential

Know the main benefits of using routers to segment the network. The main benefits of using routers to segment the network are their ability to control the chosen path of data, their ability to translate between multiple media types, their control of forwarding broadcasts and multicasts, and better manageability.

Key Terms and Concepts

router A layer 3 device used to segment networks, route data traffic exiting its current network, and make routing solutions for VLANs.

Related posts:

1. Advantages of LAN Segmentation
2. LAN segmentation using bridges and switches
3. PPP Operations to Encapsulate WAN data on Cisco Routers
4. Network Congestion Problem in Ethernet Networks
5. Layered Model Exam Points
6. Virtual LANs
7. RIP Routing Protocol
8. Features and Benefits of Fast Ethernet
9. key Frame Relay Terms and Features
10. OSI Network layer Exam Points