Lesson

Question 1

What is a computer network?

Answer 1

A computer network or data network is a digital telecommunication network which allows nodes to share resources.

Question 2

How do networked computing devices exchange data?

Answer 2

Networked computing devices exchange data with each other using a data link.

Question 3

What are the two types of media used to establish connections between nodes?

Answer 3

Connections between nodes are established using either cable media or wireless media.

Question 4

What are the main types of networks based on their area of operation?

Answer 4

Wide Area Network (WAN), Metropolitan Area Network (MAN), Personal Area Network (PAN), Local Area Network (LAN).

Question 5

What is a networking device?

Answer 5

Equipment that connects directly to a network segment is referred to as a device.

Question 6

What are the two classifications of networking devices?

Answer 6

End-user devices and network devices.

Question 7

What are examples of end-user devices?

Answer 7

Computers, printers, scanners, and other devices that provide services directly to the user.

Question 8

What is a Network Interface Card (NIC)?

Answer 8

A NIC is a printed circuit board that provides network communication capabilities to and from a personal computer.

Question 9

What is Packet Tracer?

Answer 9

Packet Tracer is a cross-platform visual simulation tool designed by Cisco Systems that allows users to create network topologies and imitate modern computer networks.

Question 10

What are some examples of network devices?

Answer 10

Repeater, Bridge, Hub, Workgroup Switch, Router.

Question 11

What is subnetting?

Answer 11

Subnetting is the division of a network into several smaller subnetworks, each having its own subnetwork address.

Question 12

What is supernetting?

Answer 12

Supernetting allows an organization to combine several class C addresses to create a larger range of addresses.

Question 13

What is Classless Interdomain Routing (CIDR)?

Answer 13

CIDR is a technique devised to reduce the number of routing table entries by using a supernet mask and the lowest network address in a group.

Question 14

What is the function of a router?

Answer 14

A router is a layer 3 device that connects different networks and performs packet filtering and best path selection.

Question 15

What are the three types of routing?

Answer 15

Default routing, Static routing, Dynamic routing.

Question 16

What is dynamic routing?

Answer 16

Dynamic routing uses a routing protocol to allow one router to share information with other routers.

Question 17

What is Routing Information Protocol (RIP)?

Answer 17

RIP is a distance vector routing protocol that uses hop count as the metric for path selection.

Question 18

What is Open Shortest Path First (OSPF)?

Answer 18

OSPF is a dynamic Interior Gateway Protocol that uses a link state algorithm within a network.

Question 19

What is network security?

Answer 19

Network security is a level of guarantee that all machines in a network are working optimally and users possess only the rights granted to them.

Question 20

What are some basic network security measures?

Answer 20

Preventing unauthorized access, securing data, and guaranteeing uninterrupted services.

Question 21

What is the need for network security?

Answer 21

The need arises from the increasing number of hackers and the availability of tools that make hacking easier.

Question 22

What is Wi-Fi Protected Access (WPA)?

Answer 22

WPA encrypts information and authenticates users to ensure only authorized access to the network.

Question 23

What is Wired Equivalent Privacy (WEP)?

Answer 23

WEP is an older network security method that encrypts information but is no longer recommended due to its vulnerability.

Question 24

What are the types of authentication?

Answer 24

One-factor authentication, Two-factor authentication, Three-factor authentication.

Question 25

What are some methods of network attacks?

Answer 25

Eavesdropping, Data Modification, Identity Spoofing, Password-Based Attacks, Denial-of-Service Attack.

Question 26

What are the advantages of network security?

Answer 26

Protects personal data, facilitates information sharing, prevents hacking attempts, and secures network conversations.

Question 27

What is the importance of network security architecture?

Answer 27

It ensures that security is integrated into the network infrastructure and addresses evolving business needs.