TAILIEUCHUNG - LANs and WLANs

Tham khảo bài thuyết trình 'lans and wlans', công nghệ thông tin, hệ điều hành phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | LANs and WLANs Chapter 5 Chapter 5: LANs and WLANs Chapter Contents Section A: Network Building Blocks Section B: Wired Networks Section C: Wireless Networks Section D: Using LANs Section E: Security Through Encryption Chapter 5: LANs and WLANs Network Classifications Personal Area Network (PAN) – interconnection of personal digital devices Neighborhood Area Network (NAN) – connectivity spread over several buildings Local Area Network (LAN) – usually connects computers in a single building – this is the one most people have heard of Metropolitan Area Network (MAN) – public high-speed network with range of about 50 miles Wide Area Network (WAN) – consists of several smaller networks Chapter 5: LANs and WLANs Network Devices Each connection point on a network is referred to as a node To connect to a LAN, a computer requires network circuitry, sometimes referred to as a network interface card (NIC) A networked peripheral, or network-enabled peripheral, is any device that contains network circuitry to directly connect to a network A network device, or network appliance, is any electronic device that broadcasts network data, boosts signals, or routes data to its destination Chapter 5: LANs and WLANs Network Devices Figure 5-3 Chapter 5: LANs and WLANs Clients, Servers, and Peers Network devices can function as clients or as servers Application server File server Print server Networks that include one or more servers can operate in client/server mode Figure 5-4 and 5-5 Chapter 5: LANs and WLANs Physical Topology The arrangement of devices in a network is referred to as its physical topology Star Ring Bus Mesh Tree Two similar networks can be connected by a device called a bridge Gateway is a generic term for any device or software code used to join two networks Figure 5-6 Chapter 5: LANs and WLANs Network Links A communications channel, or link, is a physical path or frequency for signal transmissions Bandwidth

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