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Computer Networks
- Computer network - 2 or more devices / computers connected together that can communicate with each other / share data and resources
- PAN - Personal Area Network
- Bluetooth
- Bluetooth headphones
- Smart watch
- Bluetooth
- LAN - Local Area Network
- Small geographical area
- Often owned and controlled/managed by a single person or organisation
- Small geographical area
- WAN - Wide Area Network
- The internet is the largest example of a WAN
- Cover a wide geographic area
- Often under collective or distributed ownership
- The internet is the largest example of a WAN
- Pros:
- Data can be shared between devices
- Resources can be shared between devices
- Can easily monitor devices on the network
- User can logon / access their files from any device connected to the network
- Data is stored centrally and so easy to backup
- Data can be shared between devices
- Cons:
- Hardware costs are high
- Costs of employing people to manage the network are high
- Single point of failure - if the server goes offline, no one can logon or access
files
- Speeds can decrease with high traffic
- Security - malware could spread through the network / a single
compromised user account could provide access to the network
- Hardware costs are high
- PAN - Personal Area Network
- Network hardware
- Wired
- Copper
- Fibre optic
- Copper
- Wireless
- Wired
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