Data communication refers to the exchange of data in between the sources and the receivers through the form of transmission media such as wire cables. Data communication is said to be local if the communicating devices are in the same building or a similarly restricted geographical area.
This report will cover three topics, which includes OSI Layer Model, Subnet and TCP/IP Configuration.
The OSI Model (Open Systems Interconnection Model) is a conceptual framework used to describe the function of a network system. The OSI Model characterizes computing functions into a set of universal rules and have its own requirements to support operations between different products and software. In the OSI reference model, communication between computing systems are divided into seven different abstraction layers namely are Physical, Data Link, Network, Transport, Session, Presentation, and Application.
Subnet or subnetwork is a network within a network. Subnet makes the network more efficient. Through subnetting, network traffic can travel a shorter distance without going through any unnecessary router to get to their destination.
TCP/IP (Transmission Control Protocol/Internet Protocol) is a set of standard rules that allows computers to communicate on networks such as the internet. IP is an internet address system and has the core function of delivering information packets from source devices to target devices. IP is the main way in which network connections are made and creates the foundation of the internet. The IP is the part that gets the address to which the data are sent. TCP is responsible for transmitting data after the said IP address are found.
Project Scenario
This project scenario is referring to Figure 1 below. Figure 1 shows the flow of a logical network from a home network to the OUM facilities. In this figure, a OUM's student is trying to access the OnlineLearning system located in the OUM network facilities. The student is using her modem to connect to the public network before being able to connect to the OUM facilities. From the OUM network, the data will then be forwarded to the IT Center where the OnlineLearning System server is located.
