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20 Cards in this Set
- Front
- Back
How many differnet service sets are available in IEEE 802.11 |
3 |
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A(n)_____consists of one or more stations that are served by a single access point |
Basic service sets (BSS) |
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Name 3 Service that does not use an AP |
1.) Ad hoc 2.) Peer-to-peer 3.) Independent Basic Service Set |
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A(n)_____describes a specific unit of data that has been passed down from a higher OSI layer to a lower layer but has not yet been encapsulated by the lower layer |
Service Data Unit (SDU) |
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What is a restriction that applies to A-MPDU |
All of the A-MPDU within the single A-MPDU must be addressed to the same receiver |
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Name 3 options for addressing difference in the frame size |
1.) lowest common denominator 2.) jumbo frames 3.) fragmentation |
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In____made an IEEE 802.11a/b/g device will not be able to access the AP |
Greenfield |
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____frames are used to set up initial communications between device and access point |
management |
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____is when AP transmit its beacon frame and a station is looking for those frames |
Passive scanning |
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What happens if a probe request frame contains a null value |
All APs will respond |
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____is the process in which an AP accepts a station into WLAN |
Autentication |
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What uses a challege text |
Shared key authenication |
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Name the default access method doe IEEE 802.11 WLANs |
Carrier Sense Multiple Access Collision Avoidence (CSMA/CA) |
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What is true regarding block acknowledgement |
1.) Applies to IEEE 802.11a 2.) supports Multiple MPDUs in an A-MPDU 3.) Receiving node sends a block ACK only acknowleding the correct MPDU |
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_____reserves the medium for a period of time and hundles the hidden node problem |
Request to send/clear to send (RTS/CTS) |
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What is used when 802.11g devices are mixed with 802.11b devices together |
CTS-To-self |
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What interframe spaces is used for immediate response actions such as ACK and has the highest levels of priority |
Short IFS (SIFS) |
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_____is an optional polling mechanism |
point coordination function (PCF) |
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The hybrid coordination funtion (HCF) allows for different types of wireless traffic to be given different levels of_____ |
priority |
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Name 3 enhanced distributed channel Access (EDCA) access category (AC) |
1.) Background (AC_CK) 2.) Best effort (AC_BE) 3.) Video (AC_VI) |