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Unformatted text preview: I. Chapter 5 – LANs and WLANs A. Network Building Blocks 1. Network Classifications a) Personal Area Network (PAN) – interconnection of personal digital devices b) Neighborhood Area Network (NAN) – connectivity spread over several buildings c) Local Area Network (LAN) – usually connects computers in a single building d) Metropolitan Area Network (MAN) – public high-peed network with range of about 50 miles e) Wide Area Network (WAN) – consists of several smaller networks 2. LAN Standards a) LAN technologies are standardized by the Institute of Electrical and Electronics Engineers (IEEE) Project 802 – Local Network Standards (1) IEEE 802.3 (2) Ethernet 3. Network Devices a) Each connection point on a network is referred to as a node b) To connect to a LAN, a computer requires network circuitry, sometimes referred to as a network interface card (NIC) c) A networked peripheral, or network-enabled peripheral, is any device that contains network circuitry to directly connect to a network d) A network device, or network appliance, is any electronic device that broadcasts network data, boosts signals, or routes data to its destination e) A small LAN uses network devices to connect computers and peripherals f) Every device on a network requires network circuitry such as a network interface card 4. Clients, Servers, and Peers 1 Chapter 5 a) Network devices can function as clients or as servers (1) Application server (2) File server (3) Print server b) Networks that include one or more servers can operate in client/server mode 5. Physical Topology a) The arrangement of devices in a network is referred to as its physical topology (1) Star (2) Ring (3) Bus (4) Mesh (5) Tree b) Two similar networks can be connected by a device called a bridge c) Gateway is a generic term for any device or software code used to join two networks 6. Network Links a) A communications channel, or link, is a physical path or frequency for signal transmissions b) Bandwidth is the transmission capacity of a communications channel (1) Broadband (2) Narrowband 7. Communications Protocols a) Rules for efficiently transmitting data from one network node to another: 2 Chapter 5 (1) Divide messages into packets...
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- Spring '08
- Computer network, Wi-Fi, Wireless network