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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.
What are the Kernel threads Kernel threads are supported directly by the operating system .Thread creation; scheduling and management are done by the operating system. Thus the
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
Specify the goals of parsing. Goals: a. To check the validity of source string b. To agree on the syntactic structure of a source string. For invalid string this rep
Define port? Give types of port available? Ans: An I/O interface consists of circuitry needed to connect an I/O device to computer bus. One side consists of a data path contain
Function Modules are also external Subroutines. True.
a) Write a program that figures out how long it will take to pay off a credit card by making payments of $10 every month. Take care to avoid infinite loops. (How would a bank preve
reate a directory "Unix" under your home directory. Command(s): ………………………………………….
What are the two independent mechanisms for controlling interrupt request? At the device end, an interrupt enable bit in a control register verifies whether the device is permi
What is an Abstract Data Type (ADT)? Abstract data types or ADTs are a mathematical specification of a set of data and the set of operations that can be done on the data. They
Problem 1 Prove that :- x(x + y) = x by using identities 2 Write a short note on Analog to Digital Converter (ADC) 3 Differentiate between sequential and combinational ci
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