Ch. 20 Wireless Networking

Bluetooth creates personal area networks.

Bluetooth technology enables computers to link into what sort of network?

In ad hoc mode networks, all the nodes connect directly to each other.

In which mode do all the wireless devices connect directly to each other?

Watch out for microwave ovens, refrigerators, and pipes in the walls. They can interfere with a Wi-Fi signal and create dead spots.

Ralph has installed a wireless network in his house, placing the wireless access point in the kitchen, a centralized location. The Wi-Fi works fine in the living room and dining room but goes out almost completely in the bedroom. What's most likely the problem?

The SSID determines the name of a wireless network.

What determines the name of a wireless network?

Standard omni-directional antennas are called dipole antennas.

What is the name for the common omni-directional antennas found on wireless access points?

The multiple in/multiple out (MIMO) technology implementing multiple antennas enables 802.11n networks to run at much faster speeds than previous Wi-Fi networks.

What technology enables 802.11 n networks to make multiple simultaneous connections and thus improve speed over previous Wi-Fi standards?

Data transfers using the IrDA protocol top out at 4 Mbps.

What's the top speed for data transfers using IrDA technology?

A wireless access point (WAP) enables you to extend the capabilities of a wireless network.

Which device enables you to extend the capabilities of a wireless network?

WPA2 is the best of the encryption technologies listed.

Which encryption protocol offers the best security?

The 802.11ac standard functions exclusively on the 5-GHz band, while 802.11g functions on 2.4 GHz, 802.11n functions on both, and 802.11i is a security standard called WPA2.

Which of the following 802.11 standards functions only on the 5-GHz band?