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Ethernet and Wifi

Ethernet and Wifi. Chapter 7 & 8. Send and Receive Data. network adapter or network interface NIC card the most common wired Ethernet network interfaces Built into the Motherboard RJ- 45 & RJ- 11 A printed circuit card that mounts inside the computer

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Ethernet and Wifi

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  1. Ethernet and Wifi Chapter 7 & 8

  2. Send and Receive Data • network adapter or network interface NIC card • the most common wired Ethernet network interfaces • Built into the Motherboard • RJ-45 & RJ-11 • A printed circuit card that mounts inside the computer • A PC card that plugs into a laptop computer • An external unit connected to the computer through a USB cable

  3. Ethernet ports asstandard features

  4. Setting the BIOS Utility • a set of controls that load configuration settings when you turn on the computer • recognize both the internal and external adapters

  5. Adding a NIC to an Old Computer • Ethernet adapters are available both as inexpensive no-name products and slightly more costly brand-name versions • To install an internal Ethernet adapter, follow these steps • USB Adapters • Network Adapters for Laptops

  6. Network Adapters for Laptops

  7. NIC Cards • The three indicator lights are: • LINK Lights in green when the adapter is connected to a live network • 10/100 Lights in yellow when the adapter is connected to a 100 Mbps network; goes dark when it’s connected to a 10 Mbps network • ACT Flashes in green as data passes through the network connection in either direction

  8. WIFI networks Chapter 8

  9. Wi-Fi • Radio signals instead of Ethernet cables to connect computers and other devices to a LAN • Wi-Fi connections are far less secure than wired networks

  10. Types of Wi-Fi Networks

  11. Operating Channels • radio spectrum • 2.4 GHz band, there are 14 overlapping Wi-Fi radio channels

  12. Wi-Fi signals

  13. Access Points • Wi-Fi access points • radio transmitter/receivers (transceivers) • 802.11g or 802.11n • A Wi-Fi adapter can also exchange data by radio directly to and from another computer in an ad hoc network

  14. Network Interface Adapters • Adapters Built into Laptops • PC Cards • USB Adapters • PCI Cards • Antennas

  15. Wi-Fi Control Programs • Access Point Configuration Programs • DHCP • IP address • Wireless network name • Channel number • Operating mode

  16. Wireless Connection Programs • programs display a list of all nearby Wi-Fi access points and identify those that are using encrypted data • Wi-Fi control program should automatically use the password and other configuration Hybrid (Wired-Wireless) Networks • Wi-Fi Security

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