Networks

Question 1

What is a packet

Answer 1

A collection of data that is transmitted over a network

Question 2

What is inside a packet

Answer 2

Data, source/destination address, tracking info, reassembling info, corruption checks

Question 3

What is a protocol

Answer 3

an agreed-upon format which allows two devices to communicate

Question 4

What rules may include in a protocol

Answer 4

Sending device indicating the end of sending, recieving device indicating the end of recieving, agreement of dats compression

Question 5

What is a TCP/IP

Answer 5

Transmission Control Protocol/Internet Protocol - IP sets the format of packets and TCP sends and recieves packets

Question 6

What is a HTTP

Answer 6

Hypertext Transfer Protocol - Used to transfer multimedia web pages

Question 7

What is a FTP

Answer 7

File Transfer Protocol - Transfer of files from one location to another

Question 8

What is a protocol stack

Answer 8

The term used when a programmer takes the rules of a protocol and implements them when creating a program

Question 9

Advantages of networks

Answer 9

Share hardware, share software, share data, central backup

Question 10

Disadvantages of networks

Answer 10

Network manager needed, initial costs are expensive, files can spread a virus

Question 11

What is a LAN

Answer 11

Local Area Network - A network for system close to each other e.g. smae building

Question 12

What is a WAN

Answer 12

Wide Area Network - A network where the systems are distant from each otherm such as different countries

Question 13

What are the different types of network topologies

Answer 13

Bus, Ring, Star

Question 14

Advantages of a bus network

Answer 14

Easy to implement new systems, less cabling so cheap

Question 15

Disadvantages of a bus network

Answer 15

If the main cable fails, the entire network goes down, data collisions are likely

Question 16

Advantages of a ring network

Answer 16

Prevents data collisions, data is quickly transferred without a bottleneck

Question 17

Disadvantages of a ring network

Answer 17

If one system fails, then the network will fail, it is difficult to add a node

Question 18

Advantages of a star network

Answer 18

Easy to set up, minimal network collisions

Question 19

Disadvantages of a star network

Answer 19

Expensive to install, extra hardware required

Question 20

What is needed for a system to join a network

Answer 20

A Network Interface Card

Question 21

How is security applied on a system

Answer 21

User access levels, suitable passwords, encryption techniques

Question 22

What should be included in a suitable password

Answer 22

Letters, numbers and non-alphanumerics

Question 23

What is a common encryption technique

Answer 23

XOR logical operator

Question 24

What are some disasters

Answer 24

Fire, power supply fail, virus damage, hacking

Question 25

What are the three parts of a disaster recovery policy

Answer 25

Before(risk analysis), During(staff response) and After(reinstalling software)

Question 26

What is a backup

Answer 26

the process of copying data so that it can be preserved and restored

Question 27

What is a typical backup policy

Answer 27

Grandfather-father-son method

Question 28

What is archiving

Answer 28

the process of storing data which is no longer in current or frequent use for security, legal purposes