An edge router is a device that sits at the edge or boundary of a network and routes between that network and another, such as between a LAN and a WAN. Layer 2 switches connect to an Ethernet interface on the edge router using Ethernet cables.The WAPs connect to switches using Ethernet cables.Laptops and smartphones connect wirelessly to wireless access points (WAPs).Desktop PCs and voice over IP (VoIP) phones connect to Layer 2 switches using Ethernet cables.Corporate resources (i.e., file servers and printers) connect to Layer 2 switches using Ethernet cables.The Branch site devices connect as follows: The cable modem connects to the Internet service provider (ISP) network.The home router connects to the service provider cable modem using an Ethernet cable.A network printer connects using an Ethernet cable to the switch port on the home router.
Laptops and tablets connect wirelessly to a home router.Home Office devices can connect as follows: Figure 1-6 Sample LAN and WAN Connections
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