Question

A. The 802.11 LLC unacknowledged connectionless service provides no flow control or error control.

TRUE or FALSE

B. An 802.11 extended service set (ESS) consists of two or more BSS’ interconnected by a distribution system (DS).

TRUE or FALSE

C. The 802.11 "integration service" performs address translation during a logical connection between the WLAN and external 802.x LANs.

TRUE or FALSE

Answer 1

A.) FALSE

The data link layer has two sublayers:

The logical link control (LLC) and

The MAC

The LLC is responsible for flow and error control. The MAC specifies how the node accesses the media.

The LLC layer is responsible for giving a dependable connection between the mobile and the SGSN(Serving GPRS Support Node). It is intended to help variable length transmission in a PTP or PTM geography. It involves the layer capacity, for example, grouping control, flow control, error control, encoding. Depending upon the status of the logical connection, it allows an unacknowledged or a recognized data transfer.The recognized data move supports error and flow control.

B.) TRUE

The Extended Service Set (ESS) comprises of at least one interconnected WLANs incorporated into LANs that show up as a single BSS to the logical connection control layer. Each BSS does the coverage of number of stations and the association between the stations are dynamiic. These associations are managed and maintained by the use of a distribution system service (DSS).

In short a BSS consists of a group of stations and one AP(Access Point) but a ESS consist of more than one AP does consisting of more that one BSS.

C) TRUE

Integration Service Enables transfer of information between a station on an WLAN and a station on an external IEEE 802.x LAN Takes care of any address interpretation and media change logic needed for the trading of information Services associated with the distribution of messages inside a DS.