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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.
Switch This is another form of the multi way decision. It is well structured, but can only be used in certain cases where; Only one variable is tested, all branches must
What is a pointer? The register or memory location that having the address of an operand is known as a pointer.
Problem: (a) What shows a Pattern a Pattern? (b) Which pattern is given below? Justify your answer. public class A { private static A instance = null; private A() {
Connectives - first-order logic: We can string predicates all together in a sentence by using connectives into the same way to conduct that we did for propositional logic. We
Virtual Memory is a way of extending a computer's memory by using a disk file to replicate add'l memory space. The OS remain track of these add'l memory addresses on the hard disk
Q. What are common reason for error massages while copying file? While copying files with copy, DOS in encounters any error, it displays a suitable error massage. The common re
Operations from events During analysis, events which are sent to target objects. An operation on these object are presented as labels on transitions and should not be explicit
What does formal verification mean? Formal verification uses Mathematical techniques by proving the design by assertions or properties. Correctness of the design can be achiev
What are null values? If the value of a field in a table is indeterminate or unknown, it is known as a null value.
Explain the types of computer architecture Computer architecture can be divided into three main categories: Instruction Set Architecture, or ISA, is the image of a computing
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