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3534231
Communication and Internet Technology
Descripción
Advanced Level (A- Level) (Communication and Internet Technology) Computer Science Mapa Mental sobre Communication and Internet Technology, creado por TS P el 22/09/2015.
Sin etiquetas
computer science
communication and internet technology
advanced level (a- level)
Mapa Mental por
TS P
, actualizado hace más de 1 año
Más
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Creado por
TS P
hace casi 9 años
90
3
0
Resumen del Recurso
Communication and Internet Technology
Hardware
Server side scripting
Uses PHP
Happens at the server side
Uses a software called Apache
Why use server side scripting?
More security
Better performance
PHP is executed on the server, the codes are not sent to the user, only its results are
Client Side Scripting
Happens at the client side (browser)
Browser looks at the tags and fetch the images, videos, javascripts...
Uses Javascript
Communicaiton Types
Parallel
Uses more than one communication line at a time to transmit more than one bit of information at a tiem
Example: Buses in the computer that connect to the motherboard
Serial
Communcation that uses only one transmission line to send one bit of information at a time
Example: Peripheral computer devices such as mouse,keyboards etc.
Simplex
Half duplex and full duplex
Client-Server Model
Thin Client Server Model
Thick Client Server Model
Synchronous
Asynchronous
Asynchronous transmission is when the two computers' clocks are not synced together
start bits and stop bits will need to be sent in order for the two computers to communicate
Communication when both computers' system clock are in time with each other and information can be sent immdiately with real time response
Web RequestLife Cycle
5 layers Internet Suite Stack
Application
Transport
Network
Data Link
Physical
Reroutes the data to its destination
Transport layer converts the URL into IP address using a DNS and passes this on to the next layer
Browser sends the URL off to the Transport layer
IP Addressing
Public
Static
Normally assigned to web hosts or servers
Does not change
Dynamic
Users/Clients only
Changes whenever a user disconnects and reconnects
Private IP
Used in LANs, always Static
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