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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.
Networks Edge and Technologies Network Edge provides information exchange between the access network and the core network. The devices and facilities in the network
Tree interconnection network: In tree interconnection network, processors are organised in a complete binary tree pattern. Figure: Tree interconnection network
Client Server Processes A network application consist of pairs of process that send message to one another over a network. For example in a web application a client
IEEE 802.4-Token bus Physical line or tree however logical ring. Stations know "left" as well as "right" stations. One token "passed" from station to station. Only station with
Besides these hardware overheads, there are certain software overheads imposed by libraries, parallel compilers, tools and operating systems. The parallel programming languages
Explain the working of Transceivers Transceivers are used to connect nodes to the several Ethernet media. Most computers and network interface cards having a built-in 10BaseT o
What are the data units at different layers of the TCP / IP protocol suite? The data unit formed at the application layer is known as a message, at the transport layer the data
Routing Principle The principle criterion of successful routing is of course correctness but it not only criterion. You might prefer to take the most direct route ( the one
Explain Presentation layer in OSI model
5. Suppose that frames are 1250 bytes long including 25 bytes of overhead. Also assume that ACK frame are 25 bytes long. Calculate the efficiency of Stop-and-Wait ARQ in a system t
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