Networks

Networks

1. WWW

   • A collection of webpages
     • Stored on computers all over the world
       • accessed via the internet
   • no central storage
     • no owner
     • Lots of places where servers are stored
   • It is like a library of information
   • World Wide Web

2. INTERNET

   • It is a group of inter-connected networks
   • Helps you communicate

3. URL

   • A URL is a web address
     • All web addresses are unique
   • Uniform Resource Center
   • WWW
   • Newstead's web address
     • https://www.newsteadwood.co.uk/
   • www.abc.co.uk/images/logo.jpg
     • Hosted on the WWW
     • abc-Name of organisation
     • .co-A company.
     • .uk-UK based
     • images-folder
     • logo.jpg-Filename on site

4. Domain Name

   • Top level Domains (TLDs)
     • .uk
       • United Kingdom
     • .fr
       • France
     • .es
       • Spain
     • .de
       • Germany
     • .cz
       • Czech Republic
     • .com
       • commercial
     • .org
       • organisation
     • .gov
       • government
     • .sch
       • school

5. HTTP

   • HyperText Transfer Protocol
   • A protocol is a set of rules
   • Defines the rules used by web browsers and servers
     • To exchange information

6. Data Packets

   • Data transmitted over the internet is broken down into smaller chunks or packets to be sent
     • The destination and sender's addresses are added
   • Each package is numbered differently then put in the right orger again

7. IP Addressing

   • Every computer in the world has a separate, unique address
     • Data can be sent to these addresses to request or display a web page
     • For example-83.170.121.1
       • A default web site IP address

8. DNS

   • Domain Name Server
   • Converts a web address or URL into the correct IP address the website sits on
   • 173.194.34.95
     • Google's IP address

Imagens e arquivos do mapa