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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
Define the term - public knowledge information It is essential to distinguish between public knowledge information and the more detailed pieces of information relating to spec
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Network Allocation Vector Timer which shows how much time must pass before a station is allowed to check the channel
10BASE-T: This is another standard of wiring function. It is usually known 10Base-T, TP Ethernet or Twisted Pair. It removes AUI cable with twisted pair cable and thick coax
what is the differnce between noise and distortion
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Which layer is responsible for negotiating data transfer syntax? Ans) The Presentation layer does the following: Manages data representation conversions, or data transfer syntax
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