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Computer Literacy > Theory > Flashcards

Theory Flashcards

1
Q

What are communication systems?

A

Electronic systems that transmit data from one location to another.

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2
Q

What are the two categories of communication channels?

A

Physical and Wireless Connections.

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2
Q

What are some examples of physical connections?

A

Twisted-pair cable.
Coaxial cable.
Fiber-optic cable.

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2
Q

What are the four basic components of a communication system?

A

Sending & Receiving devices.
Connection devices.
Communication channel.
Data Transmission Specifications.

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2
Q

What do communication channels do?

A

They carry data from one computer to another.

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2
Q

What are some examples of wireless connections?

A

Bluetooth.
Wi-Fi.
Microwave.
Satellite.

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2
Q

What is the most common connection device?

A

Modems, short for modulator-demodulator

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2
Q

What are the most commonly used modems?

A

Telephone modem.
DSL (digital subscriber line).
Cable Modem.
Wireless Modem.

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2
Q

What’s the main purpose of a modem?

A

It converts analog signals to digital signals and vice versa.

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2
Q

What are the 4 categories of bandwidth?

A

Voiceband.
Medium band.
Broadband.
Baseband.

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2
Q

What is bandwidth?

A

It is the measurement of the capacity of a communication channel.

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2
Q

What are some examples of protocols?

A

HTTP - hypertext transfer protocol.
https- hypertext transfer protocol secure
tcp - transmission control protocol
ip- internet protocol.

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2
Q

What is a protocol?

A

It is a set of communicational rules for the exchange of information between the computers in a network.

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3
Q

What is the intranet?

A

It is a private network within organizations.

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3
Q

What are some examples of network types?

A

Lan - Local Area Network
WLAN- Wireless Local Area Network
PAN - Personal Area Network
MAN - Metropolitan Area Network
WAN - Wide Area Network

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3
Q

What is a computer network?

A

It is a communication system that connects two or more computers to exchange information and share resources.

3
Q

What types of topologies are there in network topologies?

A

Star topology.
Ring topology.
Mesh Topology.

4
Q

What is the extranet?

A

It is a private network between organizations.

4
Q

What are some examples of network securities?

A

Firewalls.
Intrusion Detection System (IDS)
Virtual Private Network (VPN)

5
Q

What is a firewall?

A

It is a security system that protects an organization’s network against external threats.

5
Q

What is an IDS?

A

It is a security system that works with firewalls to protect the network.

5
Q

What information does one’s browser store without one being aware of it?

A

History files.
Cookies.
Temporary internet files.

6
Q

What is online identity?

A

It is information that people voluntarily post about themselves online.

7
Q

What are some major South African laws on privacy?

A

POPI Act
Personal Information Act.

8
Q

What are some examples of malicious programs?

A

Viruses.
DDOS attacks.
Identity Theft.
Scams.
Cyberbullying.

8
Q

What is security?

A

It is protecting individuals and organizations from theft and danger.

8
Q

What are some measures to protect computer security?

A

Restricting Access and encrypting your data.

9
Q

What are some examples of restricting access?

A

Security suites, Firewalls, and password managers.

10
Q

What are some examples of encrypting data?

A

File Encryption.
E-mail encryption.
VPN.
Website encryption.

11
Q

What are some ethics we should be aware of when using computers?

A

Copyright.
Piracy.
Plagiarism.

Computer Literacy (1 decks)

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