nt1210 Essay

837 WordsNov 12, 20134 Pages
Roman Katoliko NT1210 CHAPTER 3: Building TCP/IP Networks Lab 3.1: Network Reference Models Ex 3.1.1 What would happen if wireless devices were not governed by the Wi-Fi Alliance and each vendor had its own standards and protocol? What impact would this have on your personal life or business communications? If each vendor had their own standards and protocols, we would have a harder time making devices that we use every day to inter-operate. Imagine buying specific BRAND of ROUTER for a SPECIFIC computer just to use the internet; so if you have a Sony computer you would also need a Sony wireless router to connect to the internet via provided Sony made routers. We would to have multiple routers depending on the devices we own…show more content…
It provides the hardware means of sending and receiving data on a carrier, including defining cables, cards and physical aspects. 2. DATA LINK (Layer2) – divided into 2 sub layers: MAC, which controls how a computer on the network gains access to the data and permission to transmit it, and LLC which controls frame synchronization. At this layer, data packets are encoded and decoded into bits. It furnishes transmission protocol knowledge and management and handles errors in the physical layer, flow control and frame synchronization. 3. NETWORK (layer 3) – Provides switching and routing technologies, creating logical paths, known as virtual circuits, for transmitting data from node to node. 4. TRANSPORT (layer 4) – provides transparent transfer of data between end systems, or hosts, and is responsible for end-to-end error recovery and flow control. 5. SESSION (layer 5) – this layer establishes, managers and terminates connections between applications 6. PRESENTATION (layer 6) – this layer provides independence from differences in data representation. E.g. encryption. 7. APPLICATION (layer 7) – This layer supports application and end-user process. Ex 3.2.2 Ex 3.2.3 Briefly explain the deencapsulation steps in the communication from host B receiving a message from Host A destined for an active application. A. Converts data to bits for transmission B. Packages the data for end to end transport C. Adds the data-link header and trailer D.

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