- works in a small geographical area (e.g. a college)
- high speed, low error rate
- self-installed Comms Media (you install the wires yourself)
WAN: Wide Area Network:
- large geographical area (e.g. a bank)
- pre-existing Comms media (wires are already installed)
- lower speed, higher error rate
Internetworking: when two LANs are interconnected by WAN so they can communicate.
Topology: the map.
LAN Topology:
- Bus network- connecting devices through a bus.
- Star network- a central computer/server to which every work station is connected.
Network adapter: Network Interface Card (NIC)- plugs into the motherboard and connects a PC to the network.
Switched Ethernet:
- an Ethernet LAN that uses switches to connect individual hosts or segments.
Segmentation- splitting a computer network into sub-layers, each being a network segment or network layer.
Advantages:
- reduced congestion
- improved security
- containing network problems
Peer-to-Peer Networks:
- up to 10 machines
- no server
- no security
- all machines are equal
- good for small networks with little growth
Server-based Networks:
- over 10 machines
- central server provides network admin
- security and file storage
- faster, but more expensive and complex than PtoP
Web 2.0:
- software in Web 2.0 is no longer installed on the users machine, but accessed directly across the Internet.
- no coped software installed
- software is continuously updated
Web Service- applications located on web and accessed remotely.
SaaS- Service as a Software
Web Service Architecture- a new way of building software to make it flexible to change.
WiFi- wireless communication standard/protocol, aimed at Personal Home and business users.
Bluetooth- wireless communication standard/protocol, aimed at personal mobile devises.
Routers- receive, format and pass data onto another device in a network based on the destination IP.
IANA- Internet Assigned Numbers Authority- coordinates IP addresses globally.
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