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QUESTION - Name Services
(a) Illustrate with help of a diagram the results of a DNS lookup and an ARP lookup assuming we are using IPv4.
(b) Why do DNS root servers hold entries for two-level names such as ac.mu and un.org, rather than one-level names such as .mu and .org?
(c) Is it possible for a DNS server to provide multiple answers to a single name lookup? When and Why?
(d) Explain the use
(i) of aliases in name services
(ii) of caching servers to enhance availability
Define Data objects, attributes & relationship. Data object: Illustration of any composite information that must be understood by a software. It can be any external entity. Att
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Hybrid design: Pure top-down or pure bottom up approaches are often not practical thus hybrid approach which combines the above two approaches is often used.
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Explain acceptance testing and beta testing. Acceptance Testing and Beta testing : System tests are designed to validate a fully developed system to make sure that it meets
Subroutines Frequently, the similar piece of code must write over again in many dissimilar parts of a program. Instead of repeating the code every time it is required, there
Explain in detail the design concepts. Abstraction Functional abstraction Data abstraction Control abstraction Information hiding Every module in
Describe the advantages of proper inheritance. The biggest advantages of proper inheritance are: a.) substitutability and b.) extensibility.
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