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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
Speed, Signal type, media | example: 10Base, 100BaseT
Format for Ethernet cards | + All Ethernet standards are Baseband (digital)
26
10Base-2 [802.3a]
+ ThinNet coax, RG-58/U cable | + 185 meter distance
27
10Base-5 [802.3]
ThickNet coax, RG-8 cable | 500 meter distance
28
10Bass-T [803.3i]
CAT3 or higher twisted pair cable | 100 meter distance
29
10Base-F [802.3j]
Multimode or single mode fiber | 2000 meter distance
30
100Base-T4
Fast Ethernet | Cat3, 4, or 5 UTP
31
100Base-TX [802.3u]
CAT5 UTP or STP | 100 Meter
32
100Base-FX [802.3u]
Multimode or single mode fiber + 412 half duplex + 2000 full duplex distance
33
1000Base T
CAT5 cable 802.3ab CAT6 UTP 100 meter distance
34
1000Base TX
CAT6 UTP CAT7 UTP 100 meter distance
35
1000Base-X
``` Balanced Coax (TwinAx) 25 - 5,000 meter distance ```
36
1000Base-CX
Balanced Coax | 25 meter
37
1000Base-SX
Multi-mode Fiber -850nm
38
1000Base-LX
Single or Multi mode Fiber 1300nm | 5,000(SM) OR 550(MM)
39
1000Base-LH
Single or Multi mode Fiber 1300nm | 10,000(SM) OR 550(MM)
40
10GBase-X
Multi-mode fiber - 850nm | 65 meter distance
41
Multi-mode fiber - 850nm -LAN 300 meter distance
10GBase-SR
42
Multi-mode fiber - 850nm -SONET/WAN 300 meter distance
10GBase-SW
43
Single-mode fiber - 1310nm -LAN 10,000 meter distance
10GBase-LR
44
Single-mode fiber - 1310nm -SONET/WAN 10,000 meter distance
10GBase-LW
45
Single-mode fiber - 1550nm -LAN 40,000 meter distance
10GBase-ER
46
Single-mode fiber - 1550nm -SONET/WAN 40,000 meter distance
10GBase-EW
47
CAT6 or higher UTP or STP 55 meter or 100 meter
10GBase-T
48
4 matched Twinax cables (2.5Gbps per cable 25 meters
10GBase-CX4
49
Provide 15.4 W of power CAT5 OR higher copper cable
PoE = Power of Ethernet 802.3af
50
Provides 25.5 W of power compatible with 802.3af
PoE+ 802.3at
51
OSI Layer 3 forwarding decisions based on IP address
Routers _ Access Routers Distribution Routers Core Routers
52
Software program or hardware device that protect a network device by blocking unsolicited traffic
Firewall
53
Layer 2 protocol used to prevent switching loop | -Blocks one port (Blocking state)
Spanning Tree Protocol (STP)
54
Common connecting point for nodes or segments + Layer 2 of the OSI model + decisions based on MAC address
Switch
55
First intelligent (Data Link) Layer 2 OSI devices + Learned MAC address to forward frame + first to create Collision Domains + Can not control broadcast
Bridge (software based)
56
Layer 2 OSI (Data Link) Device + executes decision based on MAC address + Can not control broadcast
Switches
57
Layer 3 of the OSI Model (Network) device + Logical addressing decisions + each port handles a different address range + Do not pass broadcasts
Router
58
Switching mode - receives data packet and forwards - no error checking - does not discard packets
Cut-through
59
Switching mode - scans the first 64 bytes for damage by collision - forwards after receiving the 64 bytes
Fragment-free
60
Switching mode - calculates the CRC - verifies the payload for damaged frames - inspects FCS before forwarding - discards incomplete/damaged segments
Store-and-forward
61
ASIC and lower latency links Store and Forward is the default frame processing method
Application-Specific integrated circuits
62
Software controlled Broadcast domains All computers can see each other Contains broadcast;
VLAN
63
802.1q | ISL
Trunking methods
64
messaging protocol that switches us to up date each other's VLAN databases
VLAN Trunking Protocol (VTP)

Network (8 decks)

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