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Explain what are the External Threats
External security threats are the most problematic ones. Till date the greatest threat was the virus menace. Now, with the sophisticated technology, a number of new threats have developed. It becomes difficult to know when an outsider will attempt to hack the systems or who the intruder maybe. There are a number of examples in the past, the recent being hacking of the government's servers by certain terrorists and foreign nationals.
Some people go to great extremes to gain access to the systems and information. If the Intranet is connected with the outside world via the Internet, it will discover a whole new set of potential problems and subject to a number of attacks. Internal & external threats are shown by Figure1, where one Internal person in Intranet is trying to break the Internal security and one external person is also trying to enter in the Intranet of the organisation.
The Common method for writing a program with PVM is as follows: A user writes one or more sequential programs in C, C++, or Fortran 77 having embedded PVM function (or subroutin
Operating system for Server Since 1994, when the original pair of web servers - NCSA HTTPd and CERN HTTPd , were proposed, dozens of commercial and shareware programs have
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design issues
Fragmentation - Wireless environment is very noisy - Corrupt frames must be retransmitted - Large frames must be divided into smaller ones to increase efficiency
What is Redundancy? The method of including extra information in the transmission solely for the purpose of comparison. This technique is known as redundancy.
Question 1 Discuss the following Switching Mechanisms- Circuit switching Message switching Packet switching Question 2 Discuss the following IEEE standard
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Q. Define layered network model? - The OSI Reference Model is collection of seven layers every specifying particular network functions. - The process of breaking up the func
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