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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.
Define external layer? The external layer is the plane at which the user sees and interacts with the data, that is, the data format in the user interface. This data format is
A computer manipulates data consistent with instructions of a stored program. Stored program means that the data and program are stored in same memory unit. Central processing unit
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What is the use of hypertext links in Internet access? Use of Hypertext links in Internet access: From the user’s view point, the Web comprised a vast, worldwide collecti
explain michesons inferometer
Write a CGI program that prints date and time at which it was run. #!/bin/sh # # CGI script that prints the date and time at which it was run # # Output the documen
Comparison between risc and cisc - computer architecture: CISC Emphasis on hardware Includes multi-clock complex instructions Memory-to-memory
Computers manipulate numbers - but decimalnumbers with digits 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 cannot be represented using two states of a digitalcircuit.Instead decimal numbers are co
Explain Recursive Descent Parsing It is a top down parsing with no backtracking. This parsing method uses a set of recursive processes to perform parsing. Most important advant
Customized User Preferences offer tremendous versatility to your individual Bugzilla experience. Let's plunge into what you can do! The first step is to click the "Edit prefs" link
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