T3 DTE Revision Flashcards
define computer network
When two or more computers are connected together to allow them to communicate
Network cable
Used to connect different devices together. They are often made up of a number of wires.
Hub
Connects a number of computers together. Ports allow cables to be plugged in from each connected computer.
Server
A powerful computer which provides services to a network
Protocol
A set of rules
Wired networks
Send data using cables
Wireless networks
Sends data through the air using radio waves
Bandwidth
Bandwidth is the amount of data that can be moved from one point to another in a certain amount of time
Higher bandwidth = more data per second
what is the Internet
The internet is a worldwide network of computers
What does IP stand for
Internet protocol
What does TCPIP stand for?
Transfer Communication Protocol (Internet Protocol)
Remember: Too Cool PIP
How do we measure bandwidth?
Bits, kilobits, megabits, gigabits
What are ‘packets’
A small segment of a larger message
What is a payload
The part of a package where parts of the message/data are stored
Router
A device that forwards messages from one network to another network over a large area
Digital footprint
Our digital footprint is all the information about us that can be found on the internet
What is metadata
Metadata is “data about the data” or, additional information that apps and devices share with each other, often without the user’s knowledge
What is keylogging
The use of a program to record every keystroke made by a computer user in order to gain fraudulent access to passwords and other confidential information
What is phishing?
a technique that attempts to trick a user into providing personal information. That personal information can then be used to access sensitive online resources, such as bank accounts and emails
What is malware?
software intended to damage a computing system or to take partial control over its operation
What is “sniffing”
“Sniffing” is the process of capturing and monitoring all data packets passing through a given network
What is cryptography
The process of hiding and coding information so only one person can access it. It’s been used for bank details, passwords and code messages- it is a way to secure information
List examples of the hardware necessary for connecting devices to networks
An example of hardware needed to connect devices to networks are cables and hubs (which connect the cables to the devices)
What is a benefit of a wired network, and a benefit of a wireless network?
Wired networks: speed, better security, reliability
Wireless networks: more than one device can be connected, mobility, no trip hazards, cheaper to add devices
