Networks and the Internet
What's covered
Key facts
A web browser acts as a client when it asks a web server for a page.
DNS stands for Domain Name System and acts like an internet phonebook.
The Internet is the largest WAN — in fact a global "network of networks".
Data sent over the Internet is split into packets, each routed independently to the destination.
A web browser is a program used to view web pages (e.g. Chrome, Firefox, Edge, Safari).
A network is best described as devices connected so they can share data and resources.
Ethernet is the most common wired LAN standard.
A client is a computer (or program) that requests a service from a server.
DNS (Domain Name System) translates domain names like google.com into the IP address of the right server.
LAN stands for Local Area Network.
Sample questions
A taste of the 69 questions in this topic — answers marked. Sign up to practise the full set with spaced repetition.
What is a client in networking?
- •Computer providing a service
- ✓Computer requesting a service
- •Device that routes data between networks
- •Machine that stores shared files centrally
What does DNS do?
- •Assigns a temporary IP address to a new device when it joins a network
- •Encrypts traffic between a web browser and a website so it cannot be read in transit
- •Stores cached copies of web pages so they load faster on a repeat visit
- ✓Translates domain names into IP addresses computers use to find each other
What does LAN stand for?
- •Large access node
- •Linked application network
- ✓Local area network
- •Wide area network
How do devices on the Internet find each other?
- •Using a phone call
- ✓Using IP addresses
- •Using postal letters
- •Using the home address
What is the name of the system of linked web pages accessed over the internet through a browser?
- •Domain Name System
- •HTTP protocol
- •The internet
- ✓World Wide Web
What is a computer network?
- •A collection of programs on one machine
- •A single computer connected to the internet
- •Software that manages file storage
- ✓Two or more linked computers
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