University:
University of Houston
Course:
COSC 2305 | Computing Structures
Academic year:

2022
Views:

274

Pages:

11
Author:

saetadzjeg

Networks Based on Distance • Local area network (LAN) is a network where nodes are located within small geographic area • Home area network (HAN) is a network located in a home • Wide area network (WAN) is made up of LANs connected over long distances • Metropolitan area network (MAN) is designed to provide access to specific geographic area such as a city 12 Network Components • All networks must include: – Means of connecting nodes to network (cables or wireless technology) – Special devices that allow nodes to communicate with each other – Software that allows network to run 13 Network Components (cont.) 14 Transmission Media • Establish a communications channel between nodes on network – Wireless networks use radio waves – Wired networks use cables to connect nodes • Twisted-pair cable • Coaxial cable • Fiber-optic cable 15 What type of connector is used with unshielded twisted-pair cable? 1. 2. 3. 4. RJ-11 JR-11 RJ-45 JR-45 0% 1 0% 2 0% 3 0% 4 Data Transfer • Data transfer rate – Maximum speed of data transmission between two nodes on a network • Throughput – Actual speed of data transfer achieved – Always less than or equal to the data transfer rate 17 Network Adapters • Devices connected to or installed in network nodes • Enable nodes to communicate with each other and access the network • Desktop and notebook computers sold today contain network adaptors – Network interface card (NIC) 18 Wireless Signals • Might have decreased throughput – Interference from magnetic and electrical sources – Interference with other wireless networks – Building materials and metal – Distance from networking equipment – Process of coding signals 19 I know what can interfere with my wireless home network signal. 1. True 2. False 0% 1 0% 2 Network Navigation Devices • Control the flow of data through a network • Data sent in bundles called packets • Router – Transfers packets between two or more networks • Switch – Receives data packets and sends them to intended nodes on same network 21 Networking Software • Home networks need operating system software that supports P2P networking – Windows – Mac OS X – Linux • Client/server networks are controlled by specialized network operating system (NOS) software – Windows Server 2008 R2 – SUSE Linux Enterprise Server 22

Networking Connecting Computing Devices 2

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