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IT Essentials > Chapter 7 Networking Concepts > Flashcards

Chapter 7 Networking Concepts Flashcards

1
Q

Host

A

Any device that sends or receives data in a network

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2
Q

Switch

A

Connects multiple devices to a network

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3
Q

Wireless router

A

Connects multiple devices to the network

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4
Q

Access point

A

Provides wireless connectivity with less features than a router

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5
Q

Modem

A

Connects a home or office to the internet

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6
Q

Copper cabling

A

Uses electrical signals to transfer data between devices

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7
Q

Fiber optic cabling

A

Uses gods or plastic fiber to carry info such as light pulses

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8
Q

Wireless connection

A

Uses radio signals, infrared tech or satellite transmission

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9
Q

Latency

A

Amount of time it takes data to travel from one location to another

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10
Q

Simplex

A

Simple one way transmission

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11
Q

Half duplex

A

When data flows in one direction at a time

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12
Q

Full-duplex

A

When data flows in both directions at the same time

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13
Q

LAN

A

Small area network

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14
Q

WLAN

A

Wide are network

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15
Q

PANS

A

Personal area network

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16
Q

MAN

A

Metropolitan area network

Spans across a campus or a city

17
Q

P2P network

A

Each device has equivalent capabilities

Hard to manage and secure

18
Q

OSI reference model

A 
Physical
Data link
Network 
Transport
Session
Presentation
Application
19
Q

TCP/ip model

A

Application
Transport
Internet
Network access

20
Q

Terms for pdus at layers

A 
Data-application layer
Segment-transport layer PDU
Packet-network layer pdu 
Frame-data link layer pdu
Bits-physical layer pdu
21
Q

Terms for CSMA/CD

A

Carrier- medium to transmit data
Sense-each devices listens to ensure it is clear to send
Multiple access- can be used by different devices at once
Collision detection-causes a doubling of voltage on the wire

22
Q

Two types of authentication introduced in the original 802.11 standard

A

Open system authentication-any wireless device can connect

Shared key authentication-allows data to be authenticated and encrypted

23
Q

3shared key authentication techniques for WLAN

A

WEP
WPA
WPA 2

24
Q

WEP

A

Wired equivalent privacy- original specification where encryption keys never change

25
Q

WPA

A

WiFi protected access

Uses WEP but secures data with much stronger temporal key integrity protocol(TKIP)

26
Q

WPA 2

A

Uses the Advanced Encryption Standard(AES)

Current industry standard

27
Q

Three basic types of modems

A

Analog phone line
Digital subscriber line
Cable modem

28
Q

Hub

A

Recieves data on one port and sends it to all other ports on a network
Extends reach of network by regenerating electrical signal

29
Q

Bridges

A

Divides lan into segments

Keeps record of each device in a segment

30
Q

Switches

A

Replaced hubs and bridges
Microsegment a lan by sending data only to device it was sent
Uses a switching table which lists all Mac addresses in network

31
Q

Routers

A

Connect networks using up address to send data to other networks

32
Q

Hardware firewall

A

Protects data and equipment on a network from unauthorized access by determining what is permitted on the network and what isn’t

33
Q

Coaxial cables

A

Uses either copper or aluminum

Carries data in form of electric signals

34
Q

Twisted pair cables

A

Uses twisted copper cabling to prevent cross talk

Unshielded twisted pair does not protect against emi

35
Q

Twisted pair wiring schemes

A

T568a and t568b

36
Q

Order for t568a

A 
Green twist
Green
Orange twist
Blue 
Blue twist
Orange
Brown twist
Brown
37
Q

Order for t568b

A 
Orange strip
Orange
Green strip
Blue 
Blue stripe
Green
Brown stripe
Brown
38
Q

Types of fiber media

A

Single mode fiber-uses single core tech and sends one beam at a time
Multi mode fiber- consists of a larger core and uses led emitters to send light pulses

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