Ethics & Networking
Networking
1968 Copyright Law
- There is nothing to write here
- Copyright given by default
- 80 years after death the work becomes public domain
- 1988 introduced the privacy act
Plagiarism
- Exists.
Licencing
- Open source
- Linux.
- Freeware
- You do not need to pay but google holds rights, you cannot modify or change
- Shareware
- Trialware for a paid product
- Proprietary
- Private, paid and not open source
- Two types:
- Off-the-shelf
- Exclusively developed for
Networking
TCP/IP
- Transmission Control Protocol and Internet Protocol
- Composed of four layers
Network Layer
- Physical components
- NICs (network interface cards)
Transport Layer
- Physical connections and transports between networks and devices.
- Cables
Internet Layer
- IPv4, IPv6
- ARP
Application Layer
- HTTP/HTTPS
- Browser, delivers information
- Also FTP, SMTP, etc.
IP addresses
Subnet Masks
- Splits the IP address into two
- Identify host computer/device
- Identify network it belongs to
IP address
- IP addresses
- addresses for each device, analagous to mobile phone numbers
- IPv4 vs IPv6 - 6 offers more security
- This is because of coincidence, but dont mention that in a test.
Cables
- UTP - Unshielded Twisted Pair
- STP - Shielded Twister Pair
- Fiber
| Type of Cable | Description | Advantages | Disadvantages |
|---|---|---|---|
| UTP | |||
| STP | |||
| Fiber - Multi Mode | |||
| Fiber - Single Mode | |||
| Wireless/Microwave/Cellular |
Hub vs Switch
Hub is old school, compare to walkie talkie radios - connect to one channel, it broadcasts to every device
Switch - mobile network, unique addresses, more secure, more privacy, less packet collisions
IPv4 vs IPv6
- Different formats. v6 can hold more addresses, as it is 128 bits compared to the v4 standard 64 bits.
What is bandwidth?
UTP vs Fibre Optic
TCP/IP Protocol
- Each layer with a short desc
- Devices that fall into each layer