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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.
what is distributed computing
Distinguish among the functions islower() and tolower(). islower( ) and tolower( ): islower(c) is a character testing function described in ctype.h header file. This
Define race condition. When several process access and manipulate similar data concurrently, then the outcome of the implementation depends on particular order in which the ac
No XML does not replace HTML. Instead, it gives an alternative which permits you to explain your own set of markup elements. HTML is expected to stay in common use for some time to
What is the binary equivalent of the decimal number 368 ? Ans. 101110000 is the Binary equivalent of the Decimal number 368. From Decimal number to Binary number conversioni
what is er diagram
What is assembler directive? SUM EQU 200 Assembler directives are not instructions that will be implemented. It easily informs the assembler that the name SUM should be chan
Define thread cancellation & target thread. The thread cancellation is the task of terminating a thread before it has done. A thread that is to be cancelled is often referred
Business Software Business information processing is the biggest single software application area. Discrete "systems" (e.g., payroll accounts receivable/payable
Identifying Constraints between Objects In a system, there are few boundaries to work on. Boundaries or Constraints are functional dependencies among objects which are not con
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