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LANs and WLANs

Chapter 5: LANs and WLANs. 2. Chapter Contents. Section A: Network Building BlocksSection B: Wired NetworksSection C: Wireless NetworksSection D: Using LANsSection E: Security Through Encryption. FastPoll True/False Questions Answer A for True and B for False. 050100 In a network, a server is a

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LANs and WLANs

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    1. Chapter 5 LANs and WLANs

    2. Chapter 5: LANs and WLANs 2 Chapter Contents Section A: Network Building Blocks Section B: Wired Networks Section C: Wireless Networks Section D: Using LANs Section E: Security Through Encryption

    3. FastPoll True/False Questions Answer A for True and B for False 050100 In a network, a server is a computer that provides services to other computers called peers. 050200 Star, ring, and mesh are examples of network topologies. 050300 When you send an e-mail message over a network, it is chopped up into packets. 050400 The IP address assigned to your computer on the Internet is derived from your computer’s MAC address. 050500 Some network technologies use home telephone or electric cabling for computer networks. Chapter 5: LANs and WLANs 3

    4. FastPoll True/False Questions Answer A for True and B for False 050600 The most popular type of wired network is Ethernet. 050700 Network speeds are measured in megabytes and gigabytes. 050800 Many wireless networks use radio waves to transmit data. 050900 Bluetooth is a wireless technology used for WANs. Chapter 5: LANs and WLANs 4

    5. FastPoll True/False Questions Answer A for True and B for False 051000 A wireless infrastructure network uses a centralized broadcasting device, such as a wireless access point or router. 051100 Wireless networks are less secure than wired networks. 051200 WEP, WPA, and PSK are examples of Wi-Fi networks. 051300 Public key encryption uses a public key to encrypt messages, but a private key is required to decrypt messages. Chapter 5: LANs and WLANs 5

    6. Chapter 5: LANs and WLANs 6 Network Building Blocks Network Classifications LAN Standards Network Devices Clients, Servers, and Peers Physical Topology Network Links Communications Protocols

    7. Question 052100 Networks come in many sizes and use many different technologies, yet they all need to communicate with each other. What is the key to network intercommunication? A. Packet switching B. Network protocols C. Network topology D. Peer-to-peer technology Chapter 5: LANs and WLANs 7

    8. Chapter 5: LANs and WLANs 8 Network Classifications Personal Area Network (PAN) – interconnection of personal digital devices Local Area Network (LAN) – usually connects computers in a single building Metropolitan Area Network (MAN) – public high-speed network with range of about 50 miles Wide Area Network (WAN) – consists of several smaller networks

    9. Chapter 5: LANs and WLANs 9 LAN Standards LAN technologies are standardized by the Institute of Electrical and Electronics Engineers (IEEE) Project 802 – Local Network Standards IEEE 802.3 ARCnet Token Ring FDDI Ethernet

    10. Chapter 5: LANs and WLANs 10 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

    11. Network Devices Chapter 5: LANs and WLANs 11 Figure 5-3Figure 5-3

    12. Chapter 5: LANs and WLANs 12 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

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