Networks
- Created by: AOconnor
- Created on: 13-05-18 18:44
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- Networks
- Performance
- Bandwidth is the mount of data that can pass between two networks
- Factors affecting performance/bandwidth speed
- Quality of transmission media
- Interference from external factors
- Number of devices on network (bandwidth is shared)
- Factors affecting performance/bandwidth speed
- Bandwidth is the mount of data that can pass between two networks
- Client-server
- Server is accessed from multiple clients
- Server controls access and hosts programs
- Client machines can be low specification
- Processing workload, backups, security and user access are managed centrally
- Server controls access and hosts programs
- Server is accessed from multiple clients
- Peer to Peer
- All computers act as both client and server
- Share files, programs and network access
- Security permissions shared
- User can access contents of any other users computer
- All computers act as both client and server
- Virtual Network
- Created using software rather than physical devices
- Allows users to share data without need for physical servers and switches
- Created using software rather than physical devices
- Hardware
- NIC
- Allows computer to communicate with network
- Includes MAC address
- Provides unique identifier with LAN
- Hexadecimal format
- Hardwired into network device
- Includes MAC address
- Allows computer to communicate with network
- Switches
- Act as gateway between computers
- Allows data to be passed between and sent directly to destination MAC address
- Act as gateway between computers
- Routers
- Connect networks together
- WAP
- Devices that connect to network and allow external connections
- Transmission media
- Wired networks use copper Ethernet cables to transmit data
- Fibre optic cables are used in larger networks requiring bigger bandwidths over long distances
- WiFi uses radio waves to transmit data between routers and computers
- Wireless networks sometimes include 3G and 4G networks and Bluetooth
- NIC
- Global servers/Internet
- DNS is an Internet naming service that link IP address to text based website address that's easier to remember
- IP addresses are assigned to network devices to allow data transfer across Internet
- Static if permanently assigned to specific computer
- Dynamic if assigned by router within a network and can change when network restarts
- Stored as 4 denary number
- IP addresses are assigned to network devices to allow data transfer across Internet
- Hosting
- Allowing users to access the host via network connection
- Host must be constantly running and maintained
- High level of technical knowledge is needed
- Host must be constantly running and maintained
- Allowing users to access the host via network connection
- Cloud computing
- Allows users to acces remote files and run applications
- Multiple users can access workplace applications from remote server without installing applications
- Allows users to access latest software from Internet-connected location
- Allows remote working and collaboration
- Allows users to acces remote files and run applications
- DNS is an Internet naming service that link IP address to text based website address that's easier to remember
- Performance
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