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Network Types > Local Area Network and Wide Area Network - Pg. 12

12 CHAPTER 1 Network Fundamentals Computers and other devices have a device installed in them that transmits and receives data to and from the cell, allowing them to communicate with the network. Wireless networks can also extend their transmission to wireless devices by implementing radio antennas that are situated on buildings or towers. The antenna serves as a cell that will cover a wider area, such as a building or campus. Characteristics of infrared-based wireless environments are as follows: Infrared communications require a direct line of site and close proximity for the communication to work. This type of wireless networking is similar to using a remote control for a TV, where each device needs to be lined up and within range of one another. Because of its limitations, it isn't generally used for networking but may be seen in a networked environment for connecting laptops and other computers to devices like printers. Here are some of the potential issues that may occur in wireless networks: There is a chance of transmissions being blocked or experiencing interfer- ence. Machinery and other devices can emit radio frequencies or electrical inter- ference that disrupts signals being exchanged between the cell and wireless devices. Some buildings using cinderblocks, large amounts of metal, or insolated to prevent transmissions from interfering with equipment can keep a wireless network from working between rooms. NETWORK TYPES A network can be in a single building or comprising computers connected together over a broader geographical area. To categorize the scope of a network, different terms have been created to classify these different network types. The types of networks that could be created include the following: Local area network (LAN) Wide area network (WAN) Metropolitan area network (MAN) Storage area network (SAN) Personal area network (PAN) Campus area network (CAN) Local Area Network and Wide Area Network LANs and WANs were the first types of networks to be classified by the area they covered. Although each of the names refers to an area, an exact range has never been firmly established and is left vague. LANs are networks spanning a limited