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iGCSE Computer Science > Topic 4: Networks > Flashcards

Topic 4: Networks Flashcards

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1
Q

Standalone computer

A

A computer that is not connected to a network

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2
Q

Network

A

An arrangement of two or more computers that are connected together for the purpose of sharing resources and data

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3
Q

Internet of Things (loT)

A

A network of physical objects that use sensors, actuators, embedded systems and wireless technology such as WiFi and bluetooth to collect and exchange data with no human interacion

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4
Q

VoIP

A

Voice internet protocol

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5
Q

LAN

A

Local Area Network
- School network

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6
Q

WAN

A

Wide Area Network
-Bank / hotel chain network

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7
Q

WLAN

A

Wireless Local Area Netwrok
- Hand held scanners

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8
Q

Server

A

A computer connceted to a network used to coordinate (store and share) huge amounts of data

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9
Q

Latency

A

The time it takes for a message to transfer (ms). AkA ping

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10
Q

Internet

A
  • An interconnected network or network of networks.
  • Most networks are part of the internet.
  • Consists of multiple cables or links that connect countries together, and can be though of as the backbone.
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11
Q

Packet switching

A
  • Breaking down a large amount of data into small packets, each packet is independent from one another
  • Each packet is tagged with:
    • Source address
    • Destination address
    • Sequence number of the packet
    • total number of packets being sent
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12
Q

Router

A

Manages communication on the network. Can have a built-in wireless access point (WAP)

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13
Q

TCP

A
  • Transmission Control Protocol
  • Responsible for delivering data to a given address
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14
Q

Modem

A

Modulator / Demodulator

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15
Q

HTTP

A

Hyper Text Transfer Protocol

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16
Q

SMTP

A

Simple Mail Transfer Protocol

17
Q

Network topology

A

A Network topology is the arrangement with which computer systems or network deveices are connected to each other

18
Q

Bus topology

A

In a bus topology, all nodes in the network are connected directly to a central cable that runs up and down the network

19
Q

Ring topology

A

Each node is connected with two other deveices

20
Q

Star typology

A

All nodes indirectly connect to each other through 1 or more switches. The switch acts as a central point through which all communications are passed.

21
Q

Mesh topology

A

There is no central connection point. Instead each node is connected to at least one other node

22
Q

Avantages of bus topology

A
  • Easy to install
    -Cheap to install
23
Q

Disadvantages of bus topology

A

-If the central cable fails the whole networks fails and stops working

24
Q

Advantages of Ring topology

A
  • No data collisions, as the data only flows in one directions
25
Q

Disadvantages of ring topology

A

If the main cable fails, the network fails

26
Q

Advantages of star topolgy

A
  • If a cable fails, the whole network will not fail and other computers can still work
  • High performance as there are no data collisions
27
Q

Disadvantages of star topology

A
  • It is expensive to build as it requires more hardware such as switches and wires
28
Q

Advantages of mesh topology

A
  • Manages a large amount of data as computers can trasnmit data simultaneously
  • If a cable fails, the network still works
29
Q

Disadvantages of mesh topology

A

-It is expensive to build
- It requires much more time to repair or build

30
Q

IP

A
  • Internet protocol
  • Responsible for obtaining the address to which data is sent.
  • A set of rules that govern data transfer in the internet
31
Q

TCP/IP

A
  • Layered protocol stack
  • Collection of protocols
  • It sets how data should be formatted and transmitted across networks
32
Q

Web Server

A

Holds and shares web pages

33
Q

File server

A

Holds and maintains user files

34
Q

Mail server

A

Handles emails between users

35
Q

Network speed

A

File size / time

iGCSE Computer Science (5 decks)

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