Exam 13: Wireless Lans

The primary service used by stations to exchange MAC frames when the frame must traverse the DS to get from a station in one BSS to a station in another BSS is ________.

A typical coverage area for a wireless LAN has a diameter of ________.

The lower sublayer of the MAC layer is the ________ which uses a contention algorithm to provide access to all traffic.

An ________ is an entity that has station functionality and provides access to the distribution system via the wireless medium for associated stations.

The ________ is a set of one or more interconnected BSSs and integrated LANs that appear as a single BSS to the LLC layer at any station associated with one of these BSSs.

OFDM LANs typically operate in either the 2.4-GHz band or the 5- GHz band.

A ________ is a system used to interconnect a set of basic service sets and integrated LANs to create an extended service set.

The IEEE 802.11 services include managing associations,delivering data, and ________.

A user module acts as an interface to a wireless LAN..

Within the United States,the FCC has authorized two unlicensed applications within the ISM band: ________ systems and very low power systems.

The smallest building block of a wireless LAN is a ________ which consists of some number of stations executing the same MAC protocol and competing for access to the same shared wireless medium.

To integrate the IEEE 802.11 architecture with a traditional wired LAN a ________ is used.The logic is implemented in a device,such as a bridge or router,that is part of the wired LAN and that is attached to the DS.

A wireless LAN is defined as one that makes use of a wireless transmission medium.

A major disadvantage of IEEE 802.11n is that it is not upward compatible with 802.11a or 802.11b.

The principal technologies used for wireless LANs are spread spectrum, narrowband microwave,and ________.

The ________ module includes either bridge or router functionality to link the wireless LAN to the backbone.

Important characteristics of Barker sequences are their robustness against interference and their insensitivity to multipath propagation.

Wireless LANs are not as vulnerable to interference and eavesdropping as wired LANs.

In the United States,________ microwave bands have been set aside for unlicensed spread spectrum use.

The IEEE 802.11 ________ layer includes infrared and spread spectrum and covers a range of data rates.