Network Transmission

Transcript

1. Networking and Protocols
2. Transmission methods –Simplex –Half Duplex –Full Duplex
3. Transmission methods – Simplex – data can only travel in one direction, typical example of simplex transmission is keyboard entry – Half Duplex – data can travel both ways bot not at the same time, typical example - walkie talkie – Full Duplex – data can travel both ways at the same time, typical example mobile phone communication, both can speak at the same time.
4. Network protocols –TCP/IP –HTTP(S) –SMTP –IMAP –POP3 –FTP –UDP
5. Network protocols – TCP/IP – Transmission Control Protocol/ Internet Protocol ▪ TCP - means of creating packets to send (information broken up) ▪ Less likely for loss of information ▪ Packets re-assembled upon delivery ▪ Error checking ▪ IP – Allows for the routing of packets to the correct location
6. TCP/IP Stack
7. Network protocols – HTTP – Hyper Text Transfer Protocol – Allows transmission of webpages written in HTML (Hyper Text Markup Language) – HTTPS – allows transmissions to be encrypted over secure socket layer
8. Network protocols – SMTP/POP3 – SMTP – Simple Mail Transfer Protocol – POP3 – Post Office Protocol (v3) – When configuring email clients you need an incoming (pop) server to be entered and an outgoing server (SMTP) so that mail can be sent/received – Could be the same e.g. pop.yahoo.com / smtp.yahoo.com, but not necessarily
9. Network protocols – IMAP – Internet Message Access Protocol – Used for email and allows for the management of emails and folders from remote devices
10. Network protocols – FTP – File Transfer Protocol – Allows for the transfer of files between computers – Has its downsides, files need to download completely before they can be read so not a suitable protocol for streaming movies/music.
11. Network protocols – UDP – User Datagram Protocol – Similar to TCP but without the error checking ▪ Gaming – error checking pointless as the game continues regardless. Need “right now” situation ▪ Explains glitches in games when sprites move rapidly to another location ▪ Reduces overhead
12. http://bit.ly/AHCSci