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Flashcards in 802 Standards Deck (20)
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1
Q

Frequency-Hopping Spread Spectrum (FHSS)

A

Is a physical layer technology for 802.11 at 1 Mbps and 2 Mbps data rates.

2
Q

Direct-Sequence Spread-Spectrum (DSSS)

A

Utilized in the 2.4 GHz frequency, DSSS is a process where data is transmitted on as many frequencies as possible. And is a physical layer technology of 802.11

3
Q

802.11 (PRIME) INFO

A

FREQ RANGE - 2.4 GHz

MODULATION - DSS, FHSS

SPEED - 2Mbps

4
Q

802.11a INFO

A

FREQ RANGE - 5 GHz

MODULATION - OFDM

SPEED - 54Mbps

5
Q

802.11b INFO

A

FREQ RANGE - 2.4 GHz

MODULATION - HR-DHSS

SPEED - 11Mbps

6
Q

802.11g INFO

A

FREQ RANGE - 2.4 GHz

MODULATION - ERP-OFDM

SPEED - 54Mbps

7
Q

802.11n INFO

A

FREQ RANGE - 2.4 GHz and 5Ghz

MODULATION - HT-OFDM

SPEED - up to 600Mbps

8
Q

802.11ac INFO

A

FREQ RANGE - 2.4 GHz

MODULATION - DSS, FHSS

SPEED - up to 1.3Gbps

9
Q

Higher Order of Modulation

A

Wireless information is converted to a digital format in the form of bits (0s & 1s). Bits are then sent over-the-air using electromagnetic waves (radio waves).

10
Q

Orthogonal frequency-division multiplexing (OFDM)

A
  • *In relation to OFDM - means signals are multiplexed in a way that the peak of one signal occurs at the null of the other neighbor signals.**
  • *EX: Wi-Fi 802.11ac, 4G, 5G cellular technologies, WiMAX, satellite**
11
Q

Channel Bonding

A

This is the process of combining one or more cellular modem connections into a single, faster virtual connection allowing the end user to utilize combined bandwidth.

12
Q

WHAT ARE THE SIX TYPES OF STATIONS?

A
  1. MASTER
  2. MANAGED
  3. AD HOC
  4. MONITOR
  5. REPEATER
  6. MESH
13
Q

What are the six types of Clients?

A
  1. ROOT MODE
  2. BRIDGE MODE
  3. WORKGROUP BRIDGE MODE
  4. REPEATER MODE
  5. MESH MODE
  6. SCANNER MODE
14
Q

Bridge Mode (Clients)

A

Provides wireless connectivity between multiple wired networks.

15
Q

Workgroup Bridge Mode (Clients)

A

Provides wireless connectivity between a group of wired network stations.

16
Q

Wireless Distribution System (WDS)

A

Uses 802.11 connection to allow wireless access points. This allows a wireless network to expand using multiple access points without a traditional wired link between them

17
Q

Three basic topologies for WLAN

A
  1. Independent Basic Service Set (IBSS)
  2. Basic Service Set (BSS)
  3. Extended Service Set (ESS)
18
Q

IBSS

A

Also known as ad-hoc mode or peer-to-peer mode refers to an office network in which there is no single node required to functions as a server.

19
Q

BSS

A

Contains at least one access point connected to a wired network infrastructure and a set of wireless end stations.

20
Q

ESS

A

Has multiple overlapping BSSs (each BSS having at least one access point) connected by the means of a Distributed System. In 802.11 the client is in charge of determining which AP to connect to