Section 4

Question 1

what is a bus topology?

Answer 1

machines are connected to a common communication line called a bus

Question 2

what is a star topology?

Answer 2

have a single machine serving as a central point to which all others are connected.

Question 3

what is a ring topology?

Answer 3

Ring topologies connect directly to each other as a peer.

Question 4

what is a mesh topology?

Answer 4

connects every device in a network to every other device; mesh networks enable redundancy while also introducing significantly more network traffic.

Question 5

What are distributed systems and what are the different types?

Answer 5

execute software as processes on more than one computer. Cluster computing, grid computing, cloud computing

Question 6

What is cluster computing?

Answer 6

uses many independent computers to provide computation or services comparable to those of a larger machine.

Question 7

what is grid computing?

Answer 7

a type of distributed system that is more loosely coupled than clusters but still works together as a system to complete large tasks.

Question 8

what is cloud computing?

Answer 8

provides large pools of shared computers that can be allocated to clients as needed.

Question 9

what is a transmission medium?

Answer 9

a component that carries data from one network device to another

Question 10

what are repeaters?

Answer 10

repeat the signal of a cable to extend range

Question 11

what are bridges?

Answer 11

a network device used to connect 2 different types of network and provide management of the message

Question 12

what are switches?

Answer 12

used on LANs to reduce network traffic by management of network messages.

Question 13

what broadcast mode can coaxial transmit in?

Answer 13

baseband and broadband

Question 14

What are tier 1 ISPs?

Answer 14

least common type that serves as the backbone of the internet. consist of high-speed, high-capacity, international WANs that are operated by large companies. build infrastructure like Atlantic Internet sea cables.

Question 15

what are tier 2 ISPs?

Answer 15

common and regional in scope. Tier 2 ISPs do not cover the entire globe but need to reach a bigger network.

Question 16

what are tier 3 ISPs?

Answer 16

independent internets, sometimes called intranets, operated by a single organization that supplies internet access to homes and businesses in a local covered area.

Question 17

what is XML used for?

Answer 17

provides a standardized style for designing notational systems for representing data as text files.

Question 18

What is Malware?

Answer 18

any software intentionally designed to cause damage to a computer, server, client, or computer network (by contrast, software that causes unintentional harm due to some deficiency is typically described as a software bug).

Question 19

what is a virus?

Answer 19

a software program that infects a computer by inserting itself into programs that already reside in the machine.

Question 20

what is a worm?

Answer 20

an autonomous program that forwards copies of itself to other machines in a network and could result in detriment of individual machines or the operations of the network.

Question 21

what is spyware

Answer 21

resides on a computer, collecting information about the computer’s activities and reporting back to the spyware’s instigator.

Question 22

what is phishing

Answer 22

used to obtain private information by simply asking for it. The perpetrator sends emails posing as a legitimate business asking for information.