802 Standards

Question 1

Frequency-Hopping Spread Spectrum (FHSS)

Answer 1

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

Question 2

Direct-Sequence Spread-Spectrum (DSSS)

Answer 2

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

Question 3

802.11 (PRIME) INFO

Answer 3

FREQ RANGE - 2.4 GHz

MODULATION - DSS, FHSS

SPEED - 2Mbps

Question 4

802.11a INFO

Answer 4

FREQ RANGE - 5 GHz

MODULATION - OFDM

SPEED - 54Mbps

Question 5

802.11b INFO

Answer 5

FREQ RANGE - 2.4 GHz

MODULATION - HR-DHSS

SPEED - 11Mbps

Question 6

802.11g INFO

Answer 6

FREQ RANGE - 2.4 GHz

MODULATION - ERP-OFDM

SPEED - 54Mbps

Question 7

802.11n INFO

Answer 7

FREQ RANGE - 2.4 GHz and 5Ghz

MODULATION - HT-OFDM

SPEED - up to 600Mbps

Question 8

802.11ac INFO

Answer 8

FREQ RANGE - 2.4 GHz

MODULATION - DSS, FHSS

SPEED - up to 1.3Gbps

Question 9

Higher Order of Modulation

Answer 9

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).

Question 10

Orthogonal frequency-division multiplexing (OFDM)

Answer 10

• *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**

Question 11

Channel Bonding

Answer 11

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.

Question 12

WHAT ARE THE SIX TYPES OF STATIONS?

Answer 12

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

Question 13

What are the six types of Clients?

Answer 13

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

Question 14

Bridge Mode (Clients)

Answer 14

Provides wireless connectivity between multiple wired networks.

Question 15

Workgroup Bridge Mode (Clients)

Answer 15

Provides wireless connectivity between a group of wired network stations.

Question 16

Wireless Distribution System (WDS)

Answer 16

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

Question 17

Three basic topologies for WLAN

Answer 17

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

Question 18

IBSS

Answer 18

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.

Question 19

BSS

Answer 19

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

Question 20

ESS

Answer 20

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