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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.
Q. Block Format and Disk Layout on CD-ROM? A typical block format is displayed in Figure (a). It comprises the subsequent fields: Sync: Sync field identifies beginning o
pls give the list of adaptive mechanism in artificial immune system
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Distinguish between PAL and PLA
Drawbacks to having call centres overseas - Culture and language problems - Animosity to overseas call centres (resulting in loss of customers) - need for extensive r
(a) Why did SAP introduce the extended star schema? Explain why it is reported to be better than the traditional schema model? (b) What is the difference between a dimension use
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A friend has promised to log in at a particular time. However, he needs to be contacted as soon as he logs in. The shell script checks after every minute whether he has logged in o
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