Unit 2-networks

Question 1

Networking

Answer 1

The exchange of information between people and organisations

Question 2

Describe the DNS

Answer 2

Domain Name System

Domain names r given for internet hosts and is a hierarchy system of finding a domain’s IP address

Question 3

What is a hub?

Answer 3

Hardware used to make up the LAN and floods data through a network

Question 4

Private network

Answer 4

Network owned by 1 co./org. who are in charge of:
Buying equipment and software
Maintaining the network
Training its staff
Often a LAN or intranet

Question 5

What is a node?

Answer 5

A device, e.g. computer, connected to a network

Question 6

Public network

Answer 6

Owned by a telecom co. like BT
Many will use it
No specific password needed
Sub-sections may be under security management

Question 7

Define topology

Answer 7

How the physical structure of a network fits together and works

Question 8

What is a modem?

Answer 8

Converts analogue data (from public communications) to digital data and vice versa

Question 9

What is a WAP and what does it do?

Answer 9

A device that makes the local wireless network between devices with WiFi/Bluetooth

Question 10

Define bus network

Answer 10

A network of one central cable with nodes running along

Question 11

What is a router?

Answer 11

Hardware used to connect private networks together (can join LANs, WANs, and WLANs) and translates protocols
Also has public and private IP addresses

Question 12

Define bottle-necking

Answer 12

Where there’s too many requests for the server to handle at the same time

Question 13

Define WLAN

Answer 13

Wireless Local Area Network

Question 14

Define bandwidth

Answer 14

The amount of data that CAN go through a network @ 1 time

Question 15

What is DSL and what does it mean?

Answer 15

Digital Subscriber Line

A wired internet connection that uses local phone lines

Question 16

List the terms for a computer

Answer 16

Node
Client
Host

Question 17

What is a MAC address?

Answer 17

The unique ID address of a single computer

Question 18

Define collision domain

Answer 18

The bit of the network where collision happen-often with simplex and abs half-duplex networks

Question 19

Define penetration

Answer 19

How far a signal can go through different media,e.g. walls and the atmosphere

Question 20

What does CSMA/CD stand for?

Answer 20

Carrier Sense Multiple Access with Collision Detection

Question 21

What is a protocol?

Answer 21

Standard rules about how something is done

Question 22

What’s zero compression?

Answer 22

Using a double colon to indicate two sets of 4 zeroes in an IPv6 address

Question 23

Define watermark

Answer 23

The maximum and minimum values of a buffer

Question 24

What is Ethernet?

Answer 24

A protocol and a wired internet connection

Question 25

What does buffering mean?

Answer 25

When data is being transmitted quicker from the buffer to device than from the file server to the buffer

Question 26

What are public and private IPs?

Answer 26

Public 1s connect you to the internet | Private 1s are the ones for the local network you’re using

Question 27

What is half-duplex communication?

Answer 27

When 2 devices are connected but can’t communicate at the same time

Question 28

Define attenuation

Answer 28

How much the signal reduces over time and the distance it travels

Question 28

What is a dynamic IP address?

Answer 28

An IP address that is temporarily given when a computer joins a network

Question 30

What does a IP address conflict mean?

Answer 30

It’s when a dynamic and static IP address are the same

Question 31

What does PSTN stand for and what does it mean?

Answer 31

Public Switch Telephone Network; this is like a modem and is the network traditional landlines use for calling each other

Question 32

What’s a static IP address?

Answer 32

A permanent address given by the network’s server/ISP

Question 33

Define bit rate

Answer 33

The no. of bits that can be sent per second | Also measure of transfer rate

Question 34

What does buffering mean?

Answer 34

Temporary data storage (being streamed)

Question 34

What is CIDR?

Answer 34

Classless inter-domain routing | Gives the IPv4 address a suffix so there’s more bits for the his and netIDs

Question 35

What’s broadcast transmission?

Answer 35

When data’s sent from the sender to the end receiver

Question 36

What’s the VoIP?

Answer 36

Voice over Internet Protocol-this converts video calls and internet telephone digital data over the internet

Question 37

What is broadband?

Answer 37

A broad bandwidth

Question 38

What is IPv4?

Answer 38

32 bit IP address format with full stops and denary no.s like 120.21.109.4.

Question 39

What does simplex communication?

Answer 39

Data/ communication travels 1 way

Question 40

What is IPv6?

Answer 40

128 bit IP address using colons and hexadecimal code-allows more host and netIDs, e.g. 3AF0:0000:756C:63C3:BBF0:5F2F:DF09:4404

Question 41

What is spread frequency hopping?

Answer 41

The device picks 1 of 79 channels at random and chooses another if it is already being used, several times per second

Question 42

What is a NetID and HostID?

Answer 42

These are the amount of bits given for the amount of networks and hosts in an IP address

Question 44

What’s a URL?

Answer 44

Uniform Resource Locator-finds out the location of a web page

Question 45

What is sub-netting?

Answer 45

Using the AND mask to split the network up into smaller, many other networks