Internets And Intranets Flashcards
What is the internet?
A group of interconnected networks that does not contain information but provides transport links for information to pass between computers.
What is the World Wide Web?
An application that runs on the internet and contains webpages written using Hypertext Markup Language.
What does URL stand for?
Uniform Resource Locator
What does HTTP stand for?
Hypertext Transfer Protocol
What is ‘www.’?
The name of the host server
What is ‘.com’?
The domain name
What is ‘.uk’?
The country code
How do we access the World Wide Web?
Via browsers
What is an intranet?
A private network used within an organisation that is inaccessible to the public.
It can be used to share resources and communicate via email.
How are intranets protected against access from unauthorised users?
Using firewalls
What does ISP stand for?
Internet Service Provider
List four services that an ISP offers.
- Variety of bandwidth options
- Email service
- Security package
- Online and phone support
List three requirements to use the internet.
- Internet browser software
- A telecommunications link (e.g. ADSL)
- A modem
Define the term bandwidth.
The rate of data transmission, measured in binary digits per second (bit/s)
The higher the bandwidth…
the quicker data flows along the line
List two things a higher bandwidth does.
- Loads pages faster
2. Downloads large files faster
What does ADSL stand for?
Asymmetric Digital Subscriber Line
What does ADSL provide?
Broadband
How does ADSL transmit data?
Via copper cables
ADSL is permanently switched on, which means that there is no need for what?
Dial-up
ADSL has how much bandwidth?
Up to 20 Mbps
How does ADSL compare to fibre optic in terms of price?
It is cheaper
What are ADSL and fibre optic both?
Data transfer technologies
What kind of cabling does fibre optic use?
Cabling made of glass fibres
How is data sent through fibre optic cables?
Data is sent as pulses of light
Fibre optic has how much bandwidth?
Extremely high bandwidth
What is fibre optic immune to?
Interference
How is the cost of fibre optic described?
Expensive
