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Addressing the Issues and Challenges of Cloud Computing



INTRODUCTION


What is tangible meaning of Cloud computing? These days everyone who is engaged in this IT world is talking about this technology. The Cloud Computing is one kind of upcoming business accounting model. Cloud Computing is a location independent computing technology, in which shared servers provide resources, software, data to computers and other devices on demand. Cloud com ....etc

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Addressing modes are an aspect of the instruction set architecture in most central processing unit (CPU) designs. The various addressing modes that are defined in a given instruction set architecture define how machine language instructions in that architecture identify the operand(s) of each instruction. An addressing mode specifies how to calculate the effective memory address of an operand by using information held in registers and/or constants contained within a machine instruction or elsewhere.

In computer programming, addressing modes ....etc

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Supernetting and Classless Addressing



Supernetting

Classes A and B are almost depleted.
Class C addresses are still available.

What if a company needs a network larger than 254 hosts?

! Give the company several consecutive blocks
of C addresses and treat these as a single supernetwork

Rules:

The number of blocks must be a power of 2

The blocks must be contiguous in the address
space (no gaps between the blocks).

The third byte of the first address i ....etc

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Efficient Addressing


How to Make Routing Scale

Flat (Ethernet) versus Hierarchical (Internet) Addresses
-All hosts attached to same network have same network address
Problem: inefficient use of Hierarchical Address Space
-class C with 2 hosts (2/255 = 0.78% efficient)
- class B with 256 hosts (256/65535 = 0.39% efficient)
Problem: still Too Many Networks
- routing tables do not scale
-Big tables make routers expensive
-route propagation protocols do not sc ....etc

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Understanding IP Addressing

Understanding IP Addressing:

Everything You Ever Wanted To Know
The Internet continues to grow at a phenomenal rate. This is reflected in
the tremendous popularity of the World Wide Web (WW), the opportunities
that businesses see in reaching customers from virtual storefronts,
and the emergence of new ways of doing business. It is clear that expanding
business and public awareness will continue to increase demand for access
to resources on the Internet.
Internet ....etc

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Abstract
GSM bears numerous security vulnerabilities.
Although GSM s architecture is designed in such a way to
provide various security features like authentication, data/
signaling confidentiality, and secrecy of a user yet the GSM
channel is susceptible to replay, interleaving and man-in-themiddle
attacks.
The GSM speech service is secure up to the point where speech
enters the core network. However to achieve end-to-end security
it is desired that the GSM subscriber, not the network operator
controls the encryption on the ....etc

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