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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.
Advantages on electronic payment system It gives good security schemes. Four necessary security requirements for safe e-payments are Authentication, Encryption, Integrity,
Explain SNMP (simple network management protocol). Once SNMP is used the management station sends a request to an agent asking this for commanding or information this to update
Q. Explain about Joint Application Development? It is defined as a structured approach in which users, managers, and analysts work together for many days in a series of intensi
Parallelism Conditions As discussed earlier, parallel computing needs the segments to be executed in parallel should be independent of each other. So before executing paralleli
What is the use of inter process communication. Inter process communication gives a mechanism to allow the co-operating process to communicate with each other and synchronies t
Develop a regular expression for Real number and Real number with optional fraction (i) A regular expression for real number is [+ | -] (d)+. (d)+ (ii) A regular expression
Question: (a) Provide types of computer systems and briefly describe each one. (b) With the help of example, explain the difference between open source software, freeware a
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Question: (a) Comment on the general structure of the IAS Computer, illustrate your answer using a diagram. (b) (i) Define CPU time. (a) (ii) A program runs in 10
What is meant by concurrent execution of database transactions in a multi user system
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