CHAPTER 5: Networking Your Computer44Introduction to NetworkingNetworking terms you should knowDHCP—Dynamic Host Configuration Protocol (DHCP) lets a router temporarily assign an IP addressto a computer on the network.IP address—Internet Protocol (IP) address is a number that uniquely identifies a computer onthe network.LAN—A local area network (LAN) is a computer network covering a local area, like a home oroffice. Wired and wireless Ethernet are common methods of creating a LAN.PAN—A personal area network (PAN) is a computer network used for communication amongcomputer devices (including cellular telephones, personal digital assistants, and printers) closeto one person. A wireless personal area network (WPAN) is made possible with Bluetooth. Theprimary purpose of a WPAN is to replace USB or Firewire cables.Subnet mask—Subnet mask is a number that identifies what subnetwork the computer islocated on. This number will be the same on all computers on a home network.WAN—A wide area network (WAN) is a computer network that covers a broad geographical area.The largest and most well-known example of a WAN is the Internet.Ethernet networkingWired Ethernet networkingAn wired Ethernet network consists of two or more computers connected together through anEthernet cable. This connection type is commonly used in offices around the world and can beused to build computer networks in the home.Ethernet, Fast Ethernet, or Gigabit EthernetEthernet is available at three different speeds. Standard Ethernet runs at 10 Mbps, Fast Ethernetruns at 100 Mbps, and Gigabit Ethernet runs at 1000 Mbps. Most home networks are built usingStandard or Fast Ethernet components. Business networks are typically built using Fast or GigabitEthernet components.To create a wired Ethernet network, you or your electrician must install special Ethernet cablesin your home or office.Using a routerThe most common way to set up a wired Ethernet network is Dynamic Host Control Protocol(DHCP) using a router. A DHCP network configuration uses a router to automatically assign IPaddresses to each computer or network device. For information on setting up a router, see therouter’s documentation.Example router-based Ethernet networkThe following is an example of a wired Ethernet network. The network is made up of a router,a cable or DSL modem, your computers, and cables connecting each of these components. Therouter is the central control point for the network.ImportantCheck local code requirements before installing Ethernet cable or other wiring in your home or office. Yourmunicipality may require you to obtain a permit and hire a licensed installer.TipTo add the ability to access a wireless Ethernet network to your wired Ethernet network, connect an access pointto the router or use a router that has a built-in access point.
