Structure of the Internet

Question 1

What is the World Wide Web (WWW)?

Answer 1

A collection of web pages that reside on computers connected to the Internet.

Question 2

How does the World Wide Web mean?

Answer 2

It uses the Internet as a service to communicate the information contained within these pages.

Question 3

Are the Wide Wide Web and Internet the same?

Answer 3

No, the Internet is frequently used without the World Wide Web.

Question 4

What are National Internet Service Providers (ISP’s)?

Answer 4

Each continent uses backbone cables connected by trans-continental leased lines fed across sea beds.

The National Internet Service Providers (ISP’s), connect directly to this backbone and distribute the Internet connection to smaller providers who turn provide access to individual homes and businesses.

Question 5

What does WWW stand for?

Answer 5

World Wide Web

Question 6

What does URL stand for?

Answer 6

Uniform Resource Locator

Question 7

What are Uniform Resource Locator’s (URL’s)?

Answer 7

Is the full address of an Internet resource, it specifies the location of a resource on the Internet, including the resource name and usually the file type, thus a browser can request it from the website server.

Question 8

Example of URL?

Answer 8

http://www.domainname.com/folder/subfolder/webpage.html#element
http - method
www - host
location - webpage
resource - element

Question 9

What does DNS stand for?

Answer 9

Domain Name System

Question 10

What is a Domain name?

Answer 10

Identifies the area or domain that an Internet resource resides in.

These are structured into a hierarchy of smaller domains and written as a string seperated by full stops as dictated by the rules of the Domain Name System.

Each domain name has 1 or more IP addresses.

Question 11

What is a Domain Name System?

Answer 11

DNS catalogues all domain names and IP addresses in a series of global directories that domain name servers can access in order to find enters, the browser requests the corresponding IP address from a local DNS.

If that DNS doesn’t have the correct IP address, the search is extended up the hierarchy to another larger DNS database.

The IP address is located and a data request is sent by the user’s computer to that location to find the web page data. A web page can be accessed within a browser by entering the IP address if it is known.

Question 12

What is does IP address stand?

Answer 12

Internet protocol address

Question 13

What is an IP address?

Answer 13

A unique address that is assigned to a network device, it performs a similar function to a home mailing address.

Question 14

Purpose of an IP address?

Answer 14

Indicates, where a packet of data is to be sent or has been sent from.
Routers use this address to direct the data packet accordingly.
If a domain name is associated with a specific IP address, the IP address is the address of the server that the website resides on.

Question 15

What does WAN stand for?

Answer 15

Wide Area Network

Question 16

What is a Wide Area Network?

Answer 16

A network, which relies on third party carriers or connections such as, those providing by British Telecom.

WAN’s are typically spread over a large geographical area.

Question 17

What does LAN stand for?

Answer 17

Local Area Network

Question 18

What is a Local Area Network?

Answer 18

A number of computing devices on a single site or in a single building,connected together by cables. The network may consist of a number of PC’s, other devices such as printers and scanners and a central server.

Users on the network can communicate with each other, as well as sharing data and hardware devices such as printers and scanners.