Study guide exam 2

Study guide exam 2 - CHAPTER 1-4, 6 OF DATA COMMUNICATION...

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CHAPTER 1-4, 6 OF DATA COMMUNICATION Network: collection of computers that communicate with one another over transmission lines or wirelessly. Three types of network are local area networks, wide area networks, and internets. Local Area Network (LAN): connects computers that reside in a single geographic location on the premises of the company that operates the LAN. The number of connected computers can range from two to several hundred. SINGLE LOCATION Wide Area Network: connect computers at different geographic locations. The computers in two separated company sites must be connected using a WAN. (computers for college of business are located on multiple campuses must be connected via a WAN vs located on a single campus) TWO OR MORE SEPARATE SITES Internet: Network of networks. Connects LANS, WANS, and other internets. The Internet with a capital I is a collection of networks that you use when you send emails or access a website. Private networks of networks, called internets, also exist. Protocol: a set of rules that two communicating devices follow. Some are used for specific LANs, WANs, or internets but some are used for all three. Small Office or Home Office: such LANs have fewer than a dozen or so computers and printers. Switch: a special-purpose computer that receives and transmits wired traffic on the LAN. When different computers communicate with each other or with printers, they do so by sending the traffic to the switch, which then redirects the traffic to the other computers or printers. LAN device : contains several Important networking components. It has a switch and a device for a wireless communication. It has devices for connecting to a WAN and via the WAN to the Internet. For SOHO It is provided by the phone or cable provider. Network interface card (NIC): a device that connects the computer’s or printer’s circuitry to the network cables. Works with programs in each devices to implement the protocols necessary. Onboard NIC: a NIC built into the computer’s circuitry. Unshielded twisted pair (UTP) cable: contains sets of wires that are twisted together to improve signal quality. However, if the connection carries a lot of traffic, the UTP cable may be replaced by optical fiber cables. Optical fiber cables: The signals on such cables are light rays, and they are reflected inside the glass core of the optical fiber cable. Wireless NIC: In the wireless computers and printer, a wireless NIC (WNIC) is used instead of a NIC. Nearly all personal computers ship from the factory with an onboard WNIC. Access point:
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This note was uploaded on 11/22/2011 for the course ACIS 1504 taught by Professor Jmlacoste during the Fall '07 term at Virginia Tech.

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Study guide exam 2 - CHAPTER 1-4, 6 OF DATA COMMUNICATION...

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