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Cyber security > Cyber security lesson 1 > Flashcards

Cyber security lesson 1 Flashcards

1
Q

What is cyber security?

A

To defend internet-connected devices and services from malicious attacks by hackers, spammers, and cybercriminals.

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2
Q

Security Objectives

A

Confidentiality
Integrity
Availability

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3
Q

Confidentiality

A

The principle of confidentiality assert that only authorized parties can access sensitive information and functions.

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4
Q

Integrity

A

The principles of integrity assert that only authorized people can alter, add, or remove sensitive information and functions.

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5
Q

Availability

A

The principles of availability assert that systems, functions and data must be available on-demand according to agreed-upon parameters based on levels of service.

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6
Q

What is a node?

A

Each of the devices on the network can be thought of as a node;a node refers to a point or joint where a connection takes place

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7
Q

What is a fiber-optic cable

A

they transfer data signals in the form of light and travel hundreds of miles significantly faster than those used in traditional electrical cables –higher banwidth

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8
Q

What is a coax cable?

A

A coax cable is primarily made of copper and transmits data through electricity.

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9
Q

What is a MAC address?

A

MAC address is a unique identifier assigned by device manufacturers to a network interface controller (NIC) for communications in a network.

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10
Q

What is a NIC?

A

NIC is a computer hardware component that connects a computer to a computer network

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11
Q

What is an IP address?

A

a means of identification of nodes that are connected to the internet or intranet

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12
Q

What is a hub?

A

a distribution center that spilts a network connection into multiple computers. Distributes info

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13
Q

What is a server?

A

Main computer that acts as a host and provides data, software, etc. to other terminals linked with it

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14
Q

What is Shared data?

A

The file that servers provide to clients such as email data files, printer access programs.

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15
Q

What is Network Interface Unit?

A

is an interpreter that is utilized in the process of establishing communication between the server and the workstations and is a device that is attached to each workstation and server.

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16
Q

what is a transmission media?

A

The facilities used to interconnect computers in a network. Sometimes called lines or channels.

17
Q

What is a switch?

A

Connects devices on a computer network by using packet switching to receive, process and forward data to the destination device

18
Q

Clients

A

Computer (users) that access and use the service of the network and shared network resources.

19
Q

Firewall

A

monitors incoming and outgoing network traffic and decides whether to allow or block specific traffic based on a defined set of security rules.

20
Q

What is a router?

A

Forwards data packets between networks . Perform traffic directing functions on the internet using IP addresses.

21
Q

What is a wireless access point?

A

Is a device that creates a wireless local area(WLAN) usually in an office or large building.

22
Q

What is a server?

A

A server is a computer program or device that provides a service to another computer program and its user

23
Q

What is Peer-to-Peer Networking Model?

A

This network facilitates the flow of information from one peer to another without any central server.
The devices must be 30 feet apart.

24
Q

classification of computer network

A

A computer network can be classified on the basis of communication media, functional relationships, topology, and scale of the network

25
Q

Communication media

A

Wired Network(coaxial/optical fiber) or wireless Network

26
Q

Network classification according to scale

A

LAN
MAN
WAN

27
Q

LAN

A

Local Area Network.
Confined to a small geographical area such as a library, college building.

28
Q

MAN

A

It is confined to a large geographical area such as a state, city, or town.

29
Q

WAN

A

Wide Area Network. It is confined to a very large geographical area such as a country or even the whole world.

30
Q

classification based on topology

A

Computer Networks can be broadly classified in the following five categories based on network topology i.e. based on how the nodes are connected in a network:

31
Q

Bus

A

every node is connected to a single cable

32
Q

Star

A

In this network topology, all the devices are connected to a single hub through a cable. This hub is the central node. The hub can be active or passive in nature

33
Q

Ring

A

In this network topology, a ring is formed between various nodes that connect a device with its exactly two neighbor devices.

34
Q

Mesh

A

every node is connected to another node via a particular channel.

35
Q

Hybrid

A

This network topology is a combination of two or more topologies.

36
Q
A

Cyber security (4 decks)

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