OSI LAYER MODEL
The OSI Model is a logical and conceptual model that describes network connectivity for networks that are open to interconnection and communication. The Open System Interconnection (OSI Model) also defines a logical network and uses different layers of protocols to efficiently explain computer packet transfer. Figure 1 PHYSICAL LAYER In this level, the raw data will be transmitted by any hardware devices. The data that student wants to transfer to OUM/IT facility will be transmitted by wireless device such as Radio signals. The data also can be transmitted by using another hardware device such as Fibre Optic Cable and Ethernet Cable. Example : Fibre Optic Cable, Ethernet Cable and Radio Signals DATA LINK LAYER Data link layer is the protocol layer in a program that manages data movement into and out of a network’s physical link. So, it will manage the data from the student’s computer to reach the Online Learning System server which is in the OUM IT Center. In the OSI ar