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Open Systems Interconnection (OS1):
As there are many different protocols for LANs and WANs, communication between two different systems can be difficult. The International Standards Organisation. (ISO) has attempted with some success to solve the problem by the introduction of Open 'Systems Interconnection (OSI). OSI defines a set of procedures and standards grouped into seven layers, for the exchange of information between terminals and computers.
In theory all systems which conform to OSI specifications should be able to interconnect, but the definitions are vague in certain areas and incompatibilities do arise. To overcome this, some countries have developed their own more detailed standards.
Anyone involved in the purchase of equipment which is to be linked to a network should find out whether there are any industry specific GOSIPS (Government OSI Profiles) to which they must conform.
Consider the one-time pad encryption scheme to encrypt a 1-bit message m, and assume m is chosen with uniform distribution from message space M={0,1}. Let E1 be the event "message
The operating system is the layer among the hardware and the programs you run. It provides programs a standard interface to the hardware; or else every program would need to includ
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A scaling constant indicates an expansion of length
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third partial product of 13*11 in binary
Classify computer systems according to capacity. How they are different from computers according to the classification of technology. Provide comparative study also.
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