Topologies

Question 1

List of basic topologies?

Answer 1

WWAN
WMAN
WPAN
WLAN

Question 2

What is WWAN?

Answer 2

Wireless Wide Area Network

Question 3

What is WMAN?

Answer 3

Wireless Metropolitan Area Network

Question 4

What is WPAN?

Answer 4

Wireless Personal Area Network

Question 5

What is WLAN?

Answer 5

Wireless Local Area Network

Question 6

Describe WWLAN

Answer 6

Covers a vast geographical area
Cellular technologies
2G GSM Global System Mobile
CDMA (Code Division Multiple Access)
3G WCDMA 
HSP

Question 7

Describe WMAN?

Answer 7

used usually in the city

has a technology called WiMax

Question 8

What is WiMax?

Answer 8

Worldwide Interoperability for Microwave Access

Its a technology standard for long-range wireless networking

Question 9

Pros of WiMax?

Answer 9

Low cost

Installed faster

Question 10

Cons of WiMax?

Answer 10

The further the slower

Question 11

Describe WPAN?

Answer 11

Used within close proximity
Examples, Bluettooth, ZigBee infra red
Low bandwidth and throughput is normal

Question 12

Describe WLAN?

Answer 12

Provides networking for a building or campus

Multiple access points connected by a wired network backbone

Question 13

What are the three service sets of 802.11-2007

Answer 13

Basic Service Set BSS
Extended Service Set ESS
Independent Basic Service Set IBSS

Question 14

Difference between SSID and BSSID?

Answer 14

SSID service set ID is the name of the network.

Within each WLAN there is multiple access points therefore BSSID must be used

Question 15

Difference between BSS and ESS

Answer 15

BSS consists of group of computers and one AP.

ESS consists of more than one AP.

Question 16

Types of Access Points?

Answer 16

Autonomous AP - Standalone Device
Cooperateive AP - ap with switch like intelligence and that work together
Controller-Based AP - ap that communicates with central controller.

Question 17

What does MSDU stand for?

Answer 17

Mac service data unit

Upper layer information contained the wireless data

Question 18

What does DSS stand for?

Answer 18

Distribution System Services

A switch like intelligence in AP that forwards the MSDU

Question 19

What is a client station?

Answer 19

Radio card that is not a part of AP

Question 20

What does it mean client station associated?

Answer 20

When a client station has a layer 2 connection with an access point

Question 21

What is IS?

Answer 21

Integration Service

enables delivery of MSDUs between DS and non 802.11 LAN via a portal

Question 22

What does DS have?

Answer 22

Distribution System Medium

Distribution System Services

Question 23

Examples of WDS?

Answer 23

Bridges repeaters mesh networks

Question 24

What is BSA?

Answer 24

Physical area of covered provided by an ap.

Question 25

ESS with Seamless Roaming

Answer 25

Always connected

Question 26

ESS with Nomantic Roaming

Answer 26

Mobility between disjointed cells

Question 27

ESS Colocation

Answer 27

When deploying an ESS with multiple AP with total or almost total overlap of coverage. Intended to increase client capacity

Question 28

Define IBSS

Answer 28

Peer to peer network Doesnt need an AP Communicate through the same channel

Question 29

define MBSS

Answer 29

802.11s - 2011 amendment uses wireless distribution of network traffic Mesh Points use Hybrid Wireless Mesh Protocol Acts as AP in BSS

Question 30

Client Modes?

Answer 30

Infrastructure | Ad Hoc

Question 31

What is an infrastructure client mode?

Answer 31

Allows communcations via an AP | Client can participate in a BSS or ESS

Question 32

What is adhoc client mode?

Answer 32

Communicate without an AP | Participate in IBSS

Question 33

What is Distribution System?

Answer 33

Interconnects a set of bss via integrated LAN creating ess