Cyber security lesson 1

Question 1

What is cyber security?

Answer 1

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

Question 2

Security Objectives

Answer 2

Confidentiality
Integrity
Availability

Question 3

Confidentiality

Answer 3

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

Question 4

Integrity

Answer 4

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

Question 5

Availability

Answer 5

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.

Question 6

What is a node?

Answer 6

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

Question 7

What is a fiber-optic cable

Answer 7

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

Question 8

What is a coax cable?

Answer 8

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

Question 9

What is a MAC address?

Answer 9

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

Question 10

What is a NIC?

Answer 10

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

Question 11

What is an IP address?

Answer 11

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

Question 12

What is a hub?

Answer 12

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

Question 13

What is a server?

Answer 13

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

Question 14

What is Shared data?

Answer 14

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

Question 15

What is Network Interface Unit?

Answer 15

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.

Question 16

what is a transmission media?

Answer 16

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

Question 17

What is a switch?

Answer 17

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

Question 18

Clients

Answer 18

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

Question 19

Firewall

Answer 19

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

Question 20

What is a router?

Answer 20

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

Question 21

What is a wireless access point?

Answer 21

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

Question 22

What is a server?

Answer 22

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

Question 23

What is Peer-to-Peer Networking Model?

Answer 23

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

Question 24

classification of computer network

Answer 24

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