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Networks
- The Internet
- Devices needed to connect
- Modem
- Convert digital signals to analogue
- Digital Signals are from a computer
- Analogue signals are from a Phone lines
- Digital Signals are from a computer
- Convert digital signals to analogue
- Router
- A router allows you to connect several devices to the iternet
- Many routers incorporate a wireless Access Point (AP),
- A router allows you to connect several devices to the iternet
- Modem
- Packets
- Types of Packets
- The IP (Internet Protocol) address it is going to
- The IP address it has come from
- The sequence number of the packet
- The number of packets in the whole communication
- The IP (Internet Protocol) address it is going to
- Types of Packets
- Protocol
- The set of rules is called a protocol
- TCP (Transmission Control Protocol)
- Breaks up messages sent over the Internet into small chunks called packets
- Reassembles the packets at the other end
- Detects errors
- Resends lost messages
- Breaks up messages sent over the Internet into small chunks called packets
- IP (Internet Protocol)
- Routes the individual
packets
- Routes the individual
packets
- TCP (Transmission Control Protocol)
- The set of rules is called a protocol
- Definition
- inter-connected computer networks
- inter-connected computer networks
- How to connect
- PC --> Router --> Modem --> ISP --> Internet
- PC --> Router --> Modem --> ISP --> Internet
- Devices needed to connect
- Network topologies
- WAN
- communicate using resources supplied by a “third party carrier”
- uses cables, telephone lines, satellites and radio waves to connect
- Spread over a large area
- communicate using resources supplied by a “third party carrier”
- LAN
- single site such as a school
- Local Area Network
- single site such as a school
- Types of Lans
- Bus
- Ring
- Bus
- WAN
Media attachments
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