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How optimization is achieved in DNS?
Two primary optimizations used in DNS and they are: replication and caching. All root servers is replicated; various copies of the server exist around the world. While a new site joins the internet, the site configures its local DNS server along with a list of root server. The site server uses any root server is most responsive at a provided point of time. Into DNS caching each server maintains a cache of names. When this looks up a new name, the server puts a copy of the binding in its cache. Before contacting other server to request a binding, the server checks its cache; when the cache have the answer the server uses the cached answer to produce a reply.
Firewalls use one or more of three methods to control traffic flowing in and out of the network: Packet filtering - Packets (small chunks of data) are examined against a s
With reference to telephone traffic, explain the terms GOS. GOS: in loss systems, the traffic carried through the network is usually lower than the actual traffic offered to
What is called PCP? The phenomenon of un-decidability is not confined to problems concerning automata. An un-decidable problem concerning on simple manipulation of strings is k
Let Consider a multiple regression model for a response y, with one quantitative idividually variable x1, and one qualitative variable at three levels. a) Write a first-order m
Q. Show Network Topology in digital system? This deals with the geometrical arrangement of nodes (endpoints consisting of physical devices such as terminals, printers, PCs, and
The idea behind inline functions is to insert the code of a known function at the point where the function is called. If done carefully, this can improve the application's performa
List the typical functions of operating systems. Classical functions of operating system are given as: (1) Process management: A process is a program throughout execution.
Explain Direct Memory Access. A modest enhances in hardware enables an IO device to transfer a block of information to or from memory without CPU intervention. This task needs
Q. Environment of the Packet Flow? Protocol stack used on Internet is referred to as TCP/IP protocol stack. If we were to follow the path that message "Hello computer 5.6.7.8!"
BIOS or Basic Input/Output System is the first program accessed by the processor during start up to make sure that all the other basic programs, hard drives, ports, peripherals and
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