Networks and security Flashcards
What is a computer network?
Two or more devices connected for communication or file sharing
What is a LAN? What area does it cover?
Local area network. It covers a small geographical area
What is a WAN? What area does it cover?
Wide area network. Covers a large geographical area
What is a PAN? What area does it cover?
Personal area network. Covers connected devices around 1 person.
Describe the layout of a star topology.
Server in the middle. Devices arranged around the server shaped as a star.
Describe the layout of a bus topology.
Computers connected outwards from a straight line. Terminators at each end of the line.
Give 2 advantages of the star topology.
High performing as no data collisions can occur
Very reliable, if one cable fails it will still run.
Give 2 disadvantages of the star topology.
Expensive to install as it uses lots of cable
Extra hardware is required
Give 2 advantages of the bus topology.
Easy to install
Cheap to install
Give 2 disadvantages of the bus topology.
If main cable fails the network fails.
It will be more slow as more devices connect.
List the TCP/IP model in order
- Application layer.
- Transport layer.
- Network/internet layer.
- Network interface layer.
What are 3 advantages of sharing a network
File sharing, hardware sharing, communication.
What are 3 disadvantages of sharing a network
Cost, management, spread of malware.
List all the different protocols
TCP/IP UDP WIFI HTTP HTTPS FTP SMTP POP IMAP
What is adware?
Type of software that either causes pop ups of windows that can’t close.
