Please enable JavaScript.
Coggle requires JavaScript to display documents.
Networking - Coggle Diagram
Networking
(1.3.1) Networks and Topologies
The different roles of computers in a client-server and peer to peer network
Client-Server network :
The server is the main and provides resources for all users.
Server managed by the network manager.
Backup is the responsibility of network manager.
Can support many users.
Security is controlled by the central computer.
The hardware needed to connect stand-alone computers into a Local Area Network:
Wireless access point
Provides the physical connection to a network for wireless devices.
It sends and receives radio signals.
Routers
Connects LANs to the internet (WAN).
Splits data into packets with the correct header and relevant data.
Switches
A switch transfers data from one device to another.
They create a MAC addressing table so that they can send data directly to the correct device once it knows them.
NIC (Network Interface Controller/Card)
Required by every device that connects to a network.
Network Interface Cards can be wired or wireless.
Network Interface Cards hold the MAC address of the individual device.
Transmission media-ethernet, co-axial, fibre optic
Makes use of unshielded twisted pair (UTP) copper cable.
Terminated with a plug at either end.
WAN (Wider Area Network)
A group of networks that cover a wider geographical area.
The infrastructure is owned by third parties like BT and VirginMedia
The Internet as a worldwide collection of computer networks:
DNS (Domain Nane Server)
Hosting
The Cloud
Web servers and clients
LAN (Local Area Network)
A network that covers a small geographical area.
The infrastructure is owned and managed by individuals or small companies.
Factors that affect performance of networks
the number of devices on the network.
the bandwidth. of the transmission medium.
the type of network traffic.
network latency.
the number of transmission. errors.
Star and Mesh network topologies
(1.3.2) Wired, Wireless and Protocols and Layers
IP addressing and MAC addressing
Standards
Encryption
Common protocols including
TCP
HTTP
HTTPS
FTP
POP
IMAP
SMTP
Wireless
Wi-Fi
Bluetooth
The concept of layers
Wired
Ethernet