Network Models

OSI
- OSI stands for Open Systems Interconnection.
- This is an reference for the application to communicate to the other application over the network.

- There are seven layers which consists of
1. Application - This is to identified when someone is going to talk to it.

2. Presentation - This is part of operating system (OS). This working is about converting the data that is ingoing or outgoing.

3. Session - This layer is to sets up. It is used to coordinates, and terminates conversations.

4. Transport - This layer is used to make the packetision data be placed in order.
- It also used for sending the packet.
- It is also including the checking of the correction within the data, whenever the data is being received or arrived.

5. Network - This layer is to handle the addressing and routing the data.
- This is used to send the data into the correct locations on the outgoing transmission.
- When this layer received the incoming transmission at the packet level.
-  IP is the network layer for the internet.

6. Data link - This layer has two sub-layers
- the logical link control layer and - the Media Access Control layer (MAC).

7. Physical - This layer is used to bring the bit stream to the entire network
- either by using the electrically
- mechanically
- through the radio waves

- The physical layer covers variety of devices and mediums
- cablings
- connectors
- receivers
- transceivers
- repeaters

TCP/IP 

TCP stands for Transmission Control Protocol
IP stands for Internet Protocol

TCP/IP is the language that a host use to access the internet.
- It consists a suite protocols that has been designed to establish a network of networks
- to provide a host with access to the internet.

Application layer - provide applications with standardized data exchange.
Transport layer - responsible for maintaining end-to-end communications across the network.
- While the TCP handles communications between hosts and
- provides

responsible for maintaining end-to-end communications across the network. TCP handles communications between hosts and provides flow control, multiplexing and reliability. The transport protocols include TCP and User Datagram Protocol (UDP), which is sometimes used instead of TCP for special purposes. 

DEFINITION

OSI model (Open Systems Interconnection)

https://searchnetworking.techtarget.com/definition/OSI [Accessed on 24th April 2018]