1.3.3 Flashcards
Characteristics of a Network
Two or more computers connected together than can transmit data
Protocols
Set of rules defining how two devices communicate with eachother
TCP/IP Stack
Transmission Control Protocol
Internet Protocol
A stack of networking protocols that work together passing packets during communication
Application Layer
Specifies what protocol needs to be used
Transport Layer
- Uses the TCP to establish an end-to-end connection between the source and recipient computer
- Adds a port number and reassembles packets
Network Layer
Adds source and destination IP addresses
Link Layer
Connection between the network devices and adds the MAC address
Local Area Network ( LAN )
A network connected across a short geographical area
- Fast internet
- Cheap
- Easy to set up
- Limited to a small area
Wide Area Network ( WAN )
A network spread over a large geographical area that requires extra hardware
- Not limited by distance
- Large network capabilities
- Expensive
- Slower than LAN
Domain Name System ( DNS )
The system given to the method of naming internet resources
Circuit Switching
A method of communication where a direct link is created between 2 devices
- Quicker reconstruction of data
- Possibility of data being lost or corrupted
Packet Switching
A method of communicating packets of data across a network
- Ability to try transfer packets globally
- More time consuming than Circuit switching
Data Packets
Segments of data that contain various pieces of information
Firewalls
Devices designed to prevent unauthorised acres to a network
Proxy Servers
Act as an intermediary , collecting and sending the data on behalf of the user
