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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
Question : (a) Describe how ‘prototyping' is important to RAD. (b) List main features of ‘prototyping'. (c) List main principles of DSDM. (d) Describe the DSDM life-
1. A virtual memory system has a virtual address space of 4 Gigabytes and a page size of 8 Kilobytes. Each page table entry occupies 4 bytes. a) How many bits remain unchanged
What is a Link? A link refers to the connectivity among two devices. It contains the type of cables and protocols used in order for single device to be able to communicate with
Drawback of Repeaters. Repeater has no filtering capability as it forwards every frame. Repeater shell be placed at accurate distance before actual signal becomes
What is the concept of gateway of last resort?
Question: a) Outline the concept of the Real Time Gross Settlement (RTGS) system in Mauritius and name the three main system components of the MACSS. b) Differentiate bet
Question 1 Explain FDM and TDM with example Question 2 Define B-ISDN and explain its services Question 3 What is symmetric key cryptography? Describe one symmetric
What does a Standard IP Access-list use as test criteria Ans) Standard IP access list use only source address.
a) TP lite , based on stored procedures. b) TP heavy , based on the TP monitors.
Asynchronous or Statistical Time Division Multiplexing As we have seen synchronous TDM does not guarantee that the full capacity of a link in sued. In fact it is more like
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