Exam 8: Wireless Networking

____ is an 802.11n feature that allows two adjacent 20-MHz channels to be combined to make a 40-MHz channel.

Most satellites circle the Earth ____ miles above the equator in a geosynchronous orbit.

____ is a command-line function for viewing and setting wireless interface parameters and it is common to nearly all versions of Linux and UNIX.

Describe the wireless spectrum.

WiMAX is defined by the IEEE 802.11 standard.

____ is the least popular WLAN standard.

A unique characteristic of the 802.11 data frame is its ____ field.

Which satellites transmit and receive signals in the 12 to 18 GHz band?

The use of multiple frequencies to transmit a signal is known as ____________________ technology.

The average geographic range for an 802.11a antenna is ____ meters.

Wireless networks are laid out using the same topologies as wired networks.

In the case of connecting two WLANs, access points could be as far as ____ feet apart.

Wireless signals experience attenuation.

Describe the use of CSMA/CA (Carrier Sense Multiple Access with Collision Avoidance) to access a shared medium.

Describe the FHSS and DSSS spread spectrum technologies.

____________________ means that satellites orbit the Earth at the same rate as the Earth turns.

An 802.11g antenna has a geographic range of ____ meters.

In ____, a wireless signal splits into secondary waves when it encounters an obstruction.

Spread spectrum is a popular way of making wireless transmissions more secure.

In ____ scanning, the station transmits a special frame, known as a probe, on all available channels within its frequency range.