There are many different types of networks that range in size and proximity. Most can be categorized into one of two basic groups: local area networks (LAN) and wide area networks (WAN).

A local area network (LAN) is a group of networked computers, printers, or other hardware devices that are all connected relatively close to each other like an office, home, or school. It allows connected users to share files, printers, or other applications. Whether as small as two computers or much larger in size, a LAN's major purpose is to allow users to share information quickly and easily.

A wide area network (WAN) is a group of networked computers in a much larger geographical area, such as a state or country. The best example of a WAN is the Internet, which spans the entire world. A router connects your personal LAN to the WAN using a type of networking protocol called TCP/IP.

Client & Protocol Every networked computer can communicate with each other through a type of software that is already included with your computer's operating system, such as Windows. The software runs in the background and plays an integral role in specifying the "techie" aspects of networking. Client and protocol are two important components in networking software. Client - The software that provides your computer with access to the network's services. The computer that requests the information from a network is usually referred to as the client. For example, when you are surfing the Internet, your computer makes client requests to receive a Web site from somewhere in the U.S. or anywhere around the world. Protocol - This is the language that the computers use to communicate with each other. The industry standard in networking today is called TCP/IP (Transmission Control Protocol/Internet Protocol). Along with your home network, it is the same protocol used most commonly on the Internet. Wireless vs Wired There are two kinds of network technologies:   Wireless - communicates through radio waves Wired - communicates through data cables (most commonly Ethernet-based) Why choose a wireless network? Wireless networks don't use cables for connections, but rather they use radio waves, like cordless phones. The advantage of a wireless network is the mobility and freedom from the restriction of wires or a fixed connection. The benefits of having a wireless network include: Mobility and freedom - work anywhere No restriction of wires or a fixed connection Quick, effortless installation No cables to buy Save cabling time and hassle Easy to expand Also known as Wi-Fi, or Wireless Fidelity, wireless networks allow you to use your network devices anywhere in an office or home, even out on the patio. You can check your e-mail or surf the Internet on your laptop anywhere in your house. There is no need to drill holes in the wall and install Ethernet cables. You can network anywhere - without wires. Outside your home, wireless networking is available in public "hotspots," such as coffee shops, businesses, hotel rooms, and airports. This is perfect for those of you who do a lot of traveling. Why choose a wired network? Wired networks have been around for decades. Wired networking technology found today is known as Ethernet. The data cables, known as Ethernet network cables or wired (CAT5) cables, connect computers and other devices that make up the networks. Wired networks are best when you need to move large amounts of data at high speeds, such as professional-quality multimedia. The benefits of having a wired network include: Relatively low cost Offers the highest performance possible Faster speed - standard Ethernet cable up to 100Mbps.