1.2 Compare and contrast TCP and UDP protocols

 

	TCP	UDP
Pros	Connection-oriented - Multiplexing using port numbers - Error recovery with ACK and SEQ - Flow control using windowing - Connection establishment and termination with SYN, ACK and FIN - Ordered data transfer and segmentation with SEQ and windowing	Connectionless - Multiplexing using port numbers - Smaller header - Less bandwidth - Less processing cycles - Less overhead bytes - Faster speed
Cons	- Bigger header - More bandwidth - More processing cycles - More overhead bytes - Slower speed	- No error recovery - No windowing - No connection establishment/termination - No ordered data transfer

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1.0 Network Fundamentals

1.1 Compare and Contrast OSI TCP/IP models

           

OSI	Layer Functional Description	TCP/IP
Application	Provides an interface from the application to the network by supplying a protocol with actions meaningful to the application (e.g. "get web page object"
Presentation	Negotiates data formats, such as ASCII text, or image types like JPEG
Session	Provides methods to group multiple bidirectional messages into a workflow for easier management and easier backout of work that happened if the entire workflow fails	Application
Transport	Focuses on data delivery between two endpoint hosts (e.g. error recovery)	Transport
Network	Defines logical addressing, routing, and routing protocols used to learn routes	Network
Data Link	Defines the protocols for delivering data over a particular single type of physical network (e.g. Ethernet protocols etc.)	Data Link
Physical	Defines the physical characteristics of the transmission medium (e.g. pins, electrical currents etc.)	Physical

- Encapsulation terminology for OSI and TCP/IP model:

- Device and protocols examples:


- Same-layer, adjacent-layer interaction (e.g. TCP to HTTP, TCP to TCP etc.)

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