Packet switching: Difference between revisions
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A network packet can hold about 1500 bytes, but this can be changed. is The MTU (Maximum Transmission Unit) for Ethernet, for instance, is 1500 bytes <ref>https://stackoverflow.com/questions/2613734/maximum-packet-size-for-a-tcp-connection</ref>. This might include all the information in a packet (including header and footer information). The '''data''' size for a packet might be around 536 bytes. | A network packet can hold about 1500 bytes, but this can be changed. is The MTU (Maximum Transmission Unit) for Ethernet, for instance, is 1500 bytes <ref>https://stackoverflow.com/questions/2613734/maximum-packet-size-for-a-tcp-connection</ref>. This might include all the information in a packet (including header and footer information). The '''data''' size for a packet might be around 536 bytes. | ||
Every packet has a header and data. | Network communication is broken down into packets. Every packet has a header and data. The header of a packet contains (among other information) the '''source''' and the '''destination''' IP address of the packet. The packet is ROUTED to it's destination by a collection of routers, all using an agreed-upon protocol of communication. | ||
The video below shows a good example of this: | |||
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<iframe width="560" height="315" src="https://www.youtube.com/embed/IvxE6Y6qAcg" frameborder="0" allowfullscreen></iframe> | |||
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== A good introductory video == | == A good introductory video == | ||
Revision as of 13:13, 12 November 2017
Packet switching is a method of grouping data transmitted over a digital network into packets which are composed of a header and a payload. Data in the header is used by networking hardware to direct the packet to its destination where the payload is extracted and used by application software. Packet switching is the primary basis for data communications in computer networks worldwide.[2]
A network packet can hold about 1500 bytes, but this can be changed. is The MTU (Maximum Transmission Unit) for Ethernet, for instance, is 1500 bytes [3]. This might include all the information in a packet (including header and footer information). The data size for a packet might be around 536 bytes.
Network communication is broken down into packets. Every packet has a header and data. The header of a packet contains (among other information) the source and the destination IP address of the packet. The packet is ROUTED to it's destination by a collection of routers, all using an agreed-upon protocol of communication.
The video below shows a good example of this:
A good introductory video[edit]
Another good video, which touches more on transmission media and wireless[edit]
See Also[edit]
Standards[edit]
These standards are used from the IB Computer Science Subject Guide[4]
- Explain how data is transmitted by packet switching.
References[edit]
- ↑ http://www.flaticon.com/
- ↑ https://en.wikipedia.org/wiki/Packet_switching
- ↑ https://stackoverflow.com/questions/2613734/maximum-packet-size-for-a-tcp-connection
- ↑ IB Diploma Programme Computer science guide (first examinations 2014). Cardiff, Wales, United Kingdom: International Baccalaureate Organization. January 2012.