Wireless ch 7
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WAN ( Wide Area network )
Vast area, most common is the Internet. Wired medium
WWAN ( Wireless Wide Area network )
broad geographical areas,wireless medium, use cell phone technologies or propriety licensed wireless bridging technology
WMAN (Wireless metropolitan area network)
coverage for a city or surrounding suburbs. 802.16 standard
competition with other broadband surfaces such as DSL and cable, know as last mile delivery
WPAN (Wireless Personal Area Network)
communication between close computer devices, such as Bluetooth and infrared. communication between portals and LANs.
WLAN (wireless local area network)
802.11 standard, networking for a building or campus environment. Use multiple 802.11 access points connected by a wired network backbone.
a half duplex device with switch like intelligence.
Integrated Service (IS)
- enables delivery of MSDUs between the distribution system (DS) and a non IEEE 802.11 LAN via a portal.
- It changes the header from a wireless network to a wired network.
Distribution system (DS)
used to interconnect a basic service sets (BSS) via integrated LANs to create an extended service set (ESS)
Distribution systems medium (DSM)
- a logical physical medium used to connect access points
- Example is 802.3 medium
Distributed system service (DSS)
- system service built inside an access point.
- Manage association and reassociation.
- use layer 2 of the 802.11 MAC
the 802.11 standard
doesn't care nor does it define onto which medium as access point translates and forwards data.
Wireless distribution system (WDS)
- a mechanism for wireless communication using a four-mac address format.
- It includes bridging, repeater ad mesh networks
- When an AP are deployed to provide coverage and backhaul.
Service Set Identifier (SSID)
- logical name to identify and 802.11 wireless network
- 32 characters and is case sensitive
- so that radio cards may identify each other in a process known as active scanning or passive scanning.
Basic Service Set (BSS)
- Its the communicating device that make up a BSS are APS with one or more client stations.
- Stations that are embers of a BSS have a layer 2 connection are called associated.
Basic service set identifier (BBSID)
- 48 bit MAC address of an access's points radio card
- Is a unique layer 2 identifier of each individual BSS.
- In eater a BSS or ESS topology the BSSID address is simply the MAC address of a single access point.
- For IBSS its the virtual address
Basic Service Area (BSA)
- The physical area of coverage provided by an access point.
- Can have a fluid shape bc of AP transmit power, antenna gain and surrounding
Extended Service Set (ESS)
- Its one or more basic service sets connected by a distribution system medium.
- Its a collection of multiple access points and their associated clients stations all united by a single DSM.
- APs have partial overlapping coverage cells.
Independent Basic Service Set (IBSS)
- radio cards that make up an IBSS network consist of solely of client stations and no access points are deployed.
- It can have multiple client stations in one physical area communicating in an ad hoc fashion.
802.11 radio cards
- In nonstandard topologies, workgroup bridge
- also in client statue or inside an access point.
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