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Firewalls
Firewalls emerged as a new technology in 1990s but its idea was present near two decades back. Historical context of "Firewall" is quite literal. It was in use to describe a barrier that separates a portion of a building dealing with fire, like a stove or a kitchen, from the rest of the structure. Later firewall found its use in connection with steam engines. It was described as a wall which separates an engine fire from passenger cars. Firewall ideas were greatly matured when Jeff Mogul from Digital Equipment Corporation published his papers in 1988 . His work described various processes that could be used to make networks secure. It was Marcus Ranum of AT&T Bell Laboratories who proposed the design of firewall and its components. He also coined the term "Firewall" for this quickly maturing technology. His work got much attention in 1990 and firewalls gained commercial popularity
Uses of fragmentation and reassembly The More bit is used for fragmentation and reassembly. If this bit is 0, then either there has been no fragmentation of this packet or this
MAC (media access control) and LLC (logical link control) are both layer 2 protocols.
Q. Difficulties in Internetwork Communication? - Data arrive at interface f1 of s1 - How does s1 know that they must be sent out from interface f3? - There is no provisio
Circuit switching is a term used in communication where the communicating nodes will be connected through a dedicated channel before any communication may take place. The methodolo
The major problems with multiple networks are as given: A computer attached to a given server can only interact with other computers attached to the similar network.
Q. How can data to be exchanged between Networks? Internetwork Links in an internetwork
How is final different from finally and finalize ()? Final is a modifier which can be applied to a class or a method or a variable. final class can't be inherited, final method
Explain the meaning of bastion host?
In spite of the incompatibilities among networks, researchers have devised a function that gives universal service among heterogeneous networks known 'internetworking'. It uses bot
What is the meaning of P-persistent If the medium is idle, transmit with probability p, and delay one time unit with probability (1 - p); if the medium is busy, continue to lis
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