Section 6 - Networks Flashcards

Keywords and questions

1
Q

Define the term Local Area Network (LAN)

A

A group of devices connected to share data, located on a single site

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2
Q

State two advantages of connecting the computers together into a LAN

A
  • The computers can share the files more easily

* The computers can share hardware

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3
Q

Explain a difference between a PAN (Personal Area Network) and a LAN

A

A PAN has a very short range, often connectung devices in the same room, whereas a LAN has a slightly bigger range, connecting devices across a site.

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4
Q

Give three advantages of the star tropology.

A

If a device or connection fails the rest of the network is unaffected.
It’s easy to add more devices to the network compared to other tropologies.
Direct connections to switch/server mean all devices can transmit data at once.

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5
Q

State the purpose of a terminator.

A

To absorbsignals and stop data reflecting back along the bus.

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6
Q

Explain one advantage and one disadvantage of bus tropologies compared to star tropologies

A

Advantage: A bus network isn’t reliant on a central server or switch whereas a star network will completely fail if the central device stops working.

Disadvantage: Bus networks are reliant on a single cable so if that cable was to fail then the whole network would stop working.

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7
Q

Define the term network protocol.

A

A set of rules for how devices communicate across a network

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8
Q

Give three benefits of using layers when working with network protocols.

A

Layers break network communication into manageable pieces.
Layers allow developers to focus on one area of the network without worrying about the others.
There are set rules for each layer.

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9
Q

Describe two families of protocols that work on the link layer of the TCP/IP model

A

1) Wi-Fi is a family of protocols that manage wireless data transfer on WLANs (Wireless Local Area Networks).
2) Ethernet is a family of protocols that manage data transfer on wired LANs.

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10
Q

Describe what is meant by a packet

A

A packet is a unit of data sent over a packet-swicthing network that contains the main data and extra information, e.g. source and destination address.

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11
Q

Define the term cyber security

A

Cyber security is the processes, practices and technologies that are put in place to protect networks, data, computers and software from attack, damage or unauthorised access.

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12
Q

What is the difference between black box and white box penetration testing

A

In a black box test, the person carrying out the attack is not given any information or credentials, whereas in a white box test, the person carrying out the test is given normal user access to the network.

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13
Q

State the name given to the practice of sending fake emails.

A

Phishing

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14
Q

What is the purpose of sending fake emails?

A

Phishing emails are used to trick people into thinking they are emails from legitimate organisations so that they give criminals their personal information, e.g. account login details.

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