CCNA 1.1 Internetworking Basics

• Internetwork is created when two or more LANs or WANs are connected via a router
• Network Segmentation involves breaking up a network into a number of smaller portions for network traffic efficiency
• Network Segmentation can be achieved by using devices such as router, switches and bridges (Hub doesn't segment network)
• A switch/bridge can replace the hub, breaking up collision domains
• A router can replace the switch/bridge, breaking up broadcast domains