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Network > Wireless Standard > Flashcards

Wireless Standard Flashcards

1
Q

802.11a

A

Speed: 54 Mbps
Frequency: 5 GHz
Range: 20 meters
MIMO Streams: 1

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2
Q

802.11b

A

Speed: 11 Mbps
Frequency: 2.4 GHz
Range: 100 meters
MIMO Streams: 1

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3
Q

802.11g

A

Speed: 54 Mbps
Frequency: 2.4 GHz
Range: 100 meters
MIMO Streams: 1

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4
Q

802.11n

A 
Speed: 150
Frequency: 2.4 or 5 GHz
Range: 70 meters @ 2.4GHz
             35 meter   @ 5 GHz
MIMO Streams: 4
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5
Q

802.11ac

A

Speed: 433 Mbps per channel
Frequency: 5 GHz
Range: 35 meters
MIMO Streams:8

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6
Q

Beamforming

A

Multiple in Multiple out RF antenna

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7
Q

WPA2/802.11i

A

Strong encryption and authentication
AES - Advanced encryption standard
EAP - Extensible authentication protocol

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8
Q

Channels ___ , ___ & ___ do not overlap within the 2.4 GHz frequency band

A

Channels 1, 6, and 11

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9
Q

Radio transmission in which the signal is sent over more than one frequency

OFDM - Orthogonal Frequency Division Multiplex

DSSS - Direct Sequence Spread Spectrum

A

Spread spectrum

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10
Q

a wireless technology that facilitates short-range wireless communication between up to 8 devices

Frequency: 2.4 GHz

Range: up to 30 meters

A

Bluetooth

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11
Q

+ a form of point-to-point wireless
+ electromagnetic energy
+ frequency range 1 GHz to 300 GHz

A

Microwave Transmission

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12
Q

Sunlight
Obstacles
Smoke, dust, fog

A

Infrared -Wireless Performance Factors

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13
Q 
Antenna signal characteristic
Wire mesh in walls, thick walls
Ambient electrical noise
Conductive obstacles
data rate
A

Radio -Wireless Performance Factors

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14
Q

one of more Wireless Access Points (WAP)

A

Infrastructure mode - Wireless mode

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15
Q

+ peer-to-peer configuration

+ device talks directly to other devices

A

Ad-hoc mode - Wireless mode

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16
Q

+ continuous announcement by a wireless access point + discoverable by wireless devices.
+ can be turned off for security

A

SSID

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17
Q

network topology + nodes are arranged in a linear format, and T-connector connections

A

Bus Topology (physical)

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18
Q

network topology + each node is connected to the two nearest nodes
+ Node form a circle

A

Ring topology (physical)

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19
Q

network topology + uses a central connectivity device, a switch, with physical connection to each node.
+ Most common

A

Star topology (physical)

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20
Q

network topology + each node is directly connected to every other node.
+ communicates with multiple nodes at the same time

A

Mesh topology (physical)

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21
Q

Frame Check Sequence (FCS)

Cyclic Redundancy Check (CRC)

A

4 (bytes) or 32 bits

Algorithm computed using the data (pay load) in the packet

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22
Q

46 bytes minimum

1500 bytes maximum

A

Data (or Payload) size of every packet segment

Device buffers are limited to 1500 bytes

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23
Q

12 Hexadecimal Characters

48 bits long (6 bytes)

A

MAC address

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24
Q

+ OUI = Organizational Unique Identifier
+ MIC = Manufacturer Identification Code
+ 24 bits

A

First half of the MAC address

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25
Q

Speed, Signal type, media

example: 10Base, 100BaseT

A

Format for Ethernet cards

+ All Ethernet standards are Baseband (digital)

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26
Q

10Base-2 [802.3a]

A

+ ThinNet coax, RG-58/U cable

+ 185 meter distance

27
Q

10Base-5 [802.3]

A

ThickNet coax, RG-8 cable

500 meter distance

28
Q

10Bass-T [803.3i]

A

CAT3 or higher twisted pair cable

100 meter distance

29
Q

10Base-F [802.3j]

A

Multimode or single mode fiber

2000 meter distance

30
Q

100Base-T4

A

Fast Ethernet

Cat3, 4, or 5 UTP

31
Q

100Base-TX [802.3u]

A

CAT5 UTP or STP

100 Meter

32
Q

100Base-FX [802.3u]

A

Multimode or single mode fiber
+ 412 half duplex
+ 2000 full duplex distance

33
Q

1000Base T

A

CAT5 cable 802.3ab
CAT6 UTP
100 meter distance

34
Q

1000Base TX

A

CAT6 UTP
CAT7 UTP
100 meter distance

35
Q

1000Base-X

A 
Balanced Coax (TwinAx)
25 - 5,000 meter distance
36
Q

1000Base-CX

A

Balanced Coax

25 meter

37
Q

1000Base-SX

A

Multi-mode Fiber -850nm

38
Q

1000Base-LX

A

Single or Multi mode Fiber 1300nm

5,000(SM) OR 550(MM)

39
Q

1000Base-LH

A

Single or Multi mode Fiber 1300nm

10,000(SM) OR 550(MM)

40
Q

10GBase-X

A

Multi-mode fiber - 850nm

65 meter distance

41
Q

Multi-mode fiber - 850nm -LAN

300 meter distance

A

10GBase-SR

42
Q

Multi-mode fiber - 850nm -SONET/WAN

300 meter distance

A

10GBase-SW

43
Q

Single-mode fiber - 1310nm -LAN

10,000 meter distance

A

10GBase-LR

44
Q

Single-mode fiber - 1310nm -SONET/WAN

10,000 meter distance

A

10GBase-LW

45
Q

Single-mode fiber - 1550nm -LAN

40,000 meter distance

A

10GBase-ER

46
Q

Single-mode fiber - 1550nm -SONET/WAN

40,000 meter distance

A

10GBase-EW

47
Q

CAT6 or higher UTP or STP

55 meter or 100 meter

A

10GBase-T

48
Q

4 matched Twinax cables (2.5Gbps per cable

25 meters

A

10GBase-CX4

49
Q

Provide 15.4 W of power

CAT5 OR higher copper cable

A

PoE = Power of Ethernet

802.3af

50
Q

Provides 25.5 W of power

compatible with 802.3af

A

PoE+ 802.3at

51
Q

OSI Layer 3

forwarding decisions based on IP address

A

Routers _
Access Routers

Distribution Routers

Core Routers

52
Q

Software program or hardware device that protect a network device by blocking unsolicited traffic

A

Firewall

53
Q

Layer 2 protocol used to prevent switching loop

-Blocks one port (Blocking state)

A

Spanning Tree Protocol (STP)

54
Q

Common connecting point for nodes or segments
+ Layer 2 of the OSI model
+ decisions based on MAC address

A

Switch

55
Q

First intelligent (Data Link) Layer 2 OSI devices
+ Learned MAC address to forward frame
+ first to create Collision Domains
+ Can not control broadcast

A

Bridge (software based)

56
Q

Layer 2 OSI (Data Link) Device
+ executes decision based on MAC address
+ Can not control broadcast

A

Switches

57
Q

Layer 3 of the OSI Model (Network) device
+ Logical addressing decisions
+ each port handles a different address range
+ Do not pass broadcasts

A

Router

58
Q

Switching mode

  • receives data packet and forwards
  • no error checking
  • does not discard packets
A

Cut-through

59
Q

Switching mode

  • scans the first 64 bytes for damage by collision
  • forwards after receiving the 64 bytes
A

Fragment-free

60
Q

Switching mode

  • calculates the CRC
  • verifies the payload for damaged frames
  • inspects FCS before forwarding
  • discards incomplete/damaged segments
A

Store-and-forward

61
Q

ASIC and lower latency links Store and Forward is the default frame processing method

A

Application-Specific integrated circuits

62
Q

Software controlled Broadcast domains
All computers can see each other
Contains broadcast;

A

VLAN

63
Q

802.1q

ISL

A

Trunking methods

64
Q

messaging protocol that switches us to up date each other’s VLAN databases

A

VLAN Trunking Protocol (VTP)

Network (8 decks)

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