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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.
Colour The use of colour is considered by many to be one of the most important areas in composition. Colours can be used in isolation or specific combinations to create partic
Compare hypertext versus hypermedia. Hypertext is basically similar as regular text - it can be stored, read, searched, or edited - with a significant except ion: hyper text h
Modus ponens rule: In fact the general format for the modus ponens rule is as follows: like if we have a true sentence that states the proposition A implies proposition B and
Q. Define the System users? System users are defined as the people who employ information systems or who are affected by information system on a regular basis i.e. validating,
Problem: A company requires a software application to calculate the weekly payment for its employees. The information about the employees (employees' data) is kept in a file.
List one advantage and one disadvantage of having large block size. Ans: Advantage: By using a huge block of memory is maximum process's accommodation that resulting is less no
Incidence Matrix: - This is the incidence matrix for an undirected group. For directed graphs, the vertex from where an edge is originating will have +1 and the vertex where the ed
To how many tables can an append structure be assigned. One table can be assigned to append structure.
Explain LAN Topologies and its basic topologies. LAN Topologies: Network topology is a physical schematic that shows interconnection of the various users. There are four fund
What is meant by a field The consecutive nonwhite space characters that define a data item collectively define a field. It is possible to limit the number of such characters b
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