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Core Technologies > Networks & Connectivity > Flashcards

Networks & Connectivity Flashcards

1
Q

Network

A

A system of interconnected devices which allows the devices to share data, they are connected by a ‘network’
i.e. computers, smart TVs, printers

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2
Q

3 common network types

A

LAN
MAN
WAN

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3
Q

LAN

A

Local Area Network

Private, small area coverage, homes/small businesses

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4
Q

MAN

A

Metropolitan Area Network

Public, mid-size area coverage, buildings, towns

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5
Q

WAN

A

Wide Area Network

Public, largest size area coverage, state/country

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6
Q

Access to WAN is provided by ____

A

ISP (Internet Service Provider)

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7
Q

How devices connect to WAN

A

Device connects to LAN, and ISP allows access to WAN

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8
Q

How devices connect together to create a network

A

Devices that are connect to WAN through personal LANs, you can connect and share information with other devices also connect to WAN

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9
Q

Is LAN and internet the same thing?

A

NO. You can be connected to LAN without having been connected to the internet. But if you have multiple devices on the same LAN, those devices can communicate together

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10
Q

Why is LAN considered secure?

A

Because it’s private and can operate without being connected to the internet, therefore more secure way to transfer data between devices connected to the LAN

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11
Q

3 layers of computer connectivity

A
  1. Physical layer
  2. Protocol layer
  3. Application layer
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12
Q

Physical layer

A

Carrier of the signals

e.g. Toslink fibre optic cable

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13
Q

Protocol layer

A

Rules or management system for the signals

e.g. S/PDIF

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14
Q

Application layer

A

The end use or task to be accomplished

e.g. Audio transfer

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15
Q

Host

A

Any device connected to a network

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16
Q

Host examples

A

Computer, mobile phones, smart TVs, Alexa Echo, OK Google, printers, etc

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17
Q

Server

A

A host with a specific job on the network

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18
Q

Server examples

A

Computer storing video/audio files to a hard drive for streaming (Netflix, Gmail, Google, etc.)

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19
Q

Client

A

A host using a server

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20
Q

Client examples

A

Your phone (host) connecting to Netflix’s servers to stream a video

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21
Q

NIC

A

Network Interface Card; a device needing to be connected to a network must possess this hardware that can send & receive information

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22
Q

NIC is a physical hardware that allows connectivity to the network. Where is it found?

A

On the computer’s motherboard

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23
Q

Every NIC has a unique __________

A

MAC (media access card) address

aka. hardware address

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24
Q

NIC’s MAC address is what kind of number?

A

A 48-bit number

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25
Q

Ethernet

A

How information is carried, wiring of physical cables, how data is transmitted over cables

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26
Q

Ethernet cables

A

CAT-5 or CAT-6

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27
Q

End connector for CAT-5/6 cables

A

RJ-45 (8P8C)

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28
Q

Two wiring types for CAT cables

A
  1. Crossover

2. Straight through

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29
Q

Crossover wiring uses how many of the 8 wires?

A

4

30
Q

Straight through wiring uses how many of the 8 wires

A

All 8

31
Q

How long can an ethernet cable be before signal become compromised?

A

100 meters

32
Q

3 transfer speeds

A
  1. Ethernet / 10BaseT
  2. Fast Ethernet / 100BaseT
  3. Gigabit Ethernet / 1000BaseT
33
Q

Transfer rate of Ethernet / 10BaseT

A

10 Mbps

34
Q

Transfer rate of Fast Ethernet / 100BaseT

A

100 Mbps

35
Q

Transfer rate of Gigabit Ethernet / 1000BaseT

A

1 Gbps

36
Q

How many channels of signal can go down a single ethernet cable?

A

512

37
Q

Benefits of network audio

A

Allows users to share resources with other users
Less cumbersome
Far signal distance
High amounts of information down one cable
Store information safely on private networks

38
Q

Information on iCloud, Google drive - where is it? Does it ‘float around in the interwebs’ as many describe?

A

Nothing is ‘floating around.’ EVERYTHING that happens on the internet is stored onto server computers, with the specific job of staring data to physical hard drives all day, every day. Many companies such as Facebook, etc. have server farms in obscure places in the world storing ALL information that is ever posted, uploaded, entered in, etc.

39
Q

Interconnected Networks is the _______

A

Internet

40
Q

How does the internet connect across the world?

A

Gigantic, thermally insulated and protected fibre optic cables and run underwater across the bottom of the ocean

41
Q

NIC exmaple

A

SIM card on a mobile

42
Q

Protocol for Wi-Fi

A

802.11

43
Q

2 most common protocols used to transfer information through a network

A
  1. Wi-Fi

2. Ethernet

44
Q

Wiring layout used for 10BaseT

A

Crossover

45
Q

Wiring layout used for 100BaseT

A

Crossover

46
Q

Wiring layout used for 1000BaseT

A

Straight through

47
Q

Switch

A

Used to connect devices together to share information and buffer signal strength to go beyond the limit of 100 meters

48
Q

Router

A

Connects devices - built-in switch that allows multiple devices to connect with the ethernet, as well as wirelessly with Wi-Fi

49
Q

Describe the connection of devices and cables from a host to the WAN

A

Host connects to LAN/router using an ethernet cable, LAN/router connects to modem using ethernet cable, and modem connects to WAN using coaxial cable

50
Q

Amount of octets in an IP address

A

4

51
Q

NAT

A

Network Address Transfer

52
Q

NAT provides what to your devices when connecting to a WAN?

A

Public IP

53
Q

Base protocol for the internet

A

TCP/IP

54
Q

Physical device/hardware needed to send and receive information over a network

A

NIC

55
Q

Device that typically provides the NAT service

A

Router

56
Q

Ping

A

A troubleshooting tool that requests a response from a device at a specific IP address

57
Q

How to access router’s software online?

A

Enter the router’s IP address into the URL of web browser

58
Q

3 settings ‘sent’ when using DHCP

A
  1. Public IP address
  2. Gateway
  3. Subnet Mask
59
Q

DNS

A

Domain Name Service

60
Q

What does DNS do?

A

Translates an IP address to a website name

61
Q

Gateway number

A

It’s the router’s IP address

62
Q

Cyberduck

A

MAC application used as FTP

63
Q

FTP

A

File transfer protocol

64
Q

What does FTP do?

A

Transfers files between devices on separate networks

65
Q

MAC application used to ping specific IP numbers

A

Network Utility

66
Q

Subnet Mask Class A

A

255.0.0.0

67
Q

Subnet Mask Class B

A

255.255.0.0

68
Q

Subnet Mask C

A

255.255.255.0

69
Q

Subnet Mask determines what?

A

How many devices can connect to the router

70
Q

Subnet Mask class typical for a household

A

Subnet Mass class C

Core Technologies (9 decks)

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