GT_001_M-1.docx

Between the specification and the implementation

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between the specification and the implementation, something that OSI does very carefully, but TCP/IP does not. Consequently, the TCP/IP model is not much of a guide for designing new networks using new technologies. Second, the TCP/IP model is not at all general and is poorly suited to describing any protocol stack other than TCP/IP. Trying to use the TCP/IP model to describe Bluetooth, for example, is completely impossible. OSI(Open System Interconnection) TCP/IP(Transmission Control Protocol / Internet Protocol) 1. OSI is a generic, protocol independent standard, acting as a communication gateway between the network and end user. 1. TCP/IP model is based on standard protocols around which the Internet has developed. It is a communication protocol, which allows connection of hosts over a network. 2. In OSI model the transport layer guarantees the delivery of packets. 2. In TCP/IP model the transport layer does not guarantees delivery of packets. Still the TCP/IP model is more reliable. 3. Follows vertical approach. 3. Follows horizontal approach. 4. OSI model has a separate Presentation layer and Session layer. 4. TCP/IP does not have a separate Presentation layer or Session layer. 5. OSI is a reference model around which the networks are built. Generally it is used as a guidance tool. 5. TCP/IP model is, in a way implementation of the OSI model. 6. Network layer of OSI model provides both connection oriented and connectionless service. 6. The Network layer in TCP/IP model provides connectionless service. 7. OSI model has a problem of fitting the protocols into the model. 7. TCP/IP model does not fit any protocol 8. Protocols are hidden in OSI model and are easily replaced as the technology changes. 8. In TCP/IP replacing protocol is not easy. 9. OSI model defines services, interfaces and protocols very clearly and makes clear distinction between them. It is protocol independent. 9. In TCP/IP, services, interfaces and protocols are not clearly separated. It is also protocol dependent. 10. It has 7 layers 10. It has 4 layers 1.2 Noem 2 tipes netwerkhardeware wat jy sal verwag om in die gebou te vind en motiveer jou antwoord. Name 2 types of network hardware you would expect to find in the building and motivate your answer. (4) Network hardware [2x1]; motivation for each hardware type [2x1] Reinforced concrete and age of building make wireless network hardware unlikely. Use of optical fibre within building is also unlikely. The following types of network hardware are therefore the most likely: Unshielded Twisted Pairs cabling; Shielded Twisted Pairs cabling; Coaxial cabling;
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