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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 do you understand by Hit ratio? When a processor refers a data item from a cache, if the referenced item is in the cache, then such a reference is called hit. If the refer
What is the Scope of public/private/friend/protected/protected friend? Scope of public/private/friend/protected/protected friend. Visual Basic/Visual C# Public/pub
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Explanation The values of global variables can be used and changed all over the project within all scripts and libraries. However it is highly recommended to remain the number o
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can you deign the schematic of a modified digital clock at the gate as well as the IC level and then construct the circuit, lab spec and industral spec?
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Explain the differences between macros and subroutines. Macros Vs Subroutines (i) Macros are pre-processor directives which are processed before the source program is pass
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