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Cloud
computing is the on-demand availability of computer system resources,
especially data storage (cloud storage) and computing power, without direct
active management by the user. The term is generally used to describe data
centers available to many users over the Internet. Large clouds, predominant
today, often have functions distributed over multiple locations from central
servers. If the connection to the user is relatively close, it may be
designated an edge server. Clouds may be limited to a single organization
(enterprise clouds), or be available to many organizations (public cloud).
Cloud computing relies on sharing of resources to achieve coherence and
economies of scale.
Advocates of public and hybrid clouds note
that cloud computing allows companies to avoid or minimize up-front IT
infrastructure costs. Proponents also claim that cloud computing allows
enterprises to get their applications up and running faster, with improved
manageability and less maintenance, and that it enables IT teams to more
rapidly adjust resources to meet fluctuating and unpredictable demand,
providing the burst computing capability: high computing power at certain
periods of peak demand.
Cloud
providers typically use a "pay-as-you-go" model, which can lead to
unexpected operating expenses if administrators are not familiarized with cloud-pricing
models. The availability of high-capacity networks, low-cost computers and
storage devices as well as the widespread adoption of hardware virtualization,
service-oriented architecture and autonomic and utility computing has led to
growth in cloud computing.By 2019, Linux was the most widely used operating
system, including in Microsoft's offerings and is thus described as dominant.
The Cloud Service Provider (CSP) will screen, keep up and gather data about the
firewalls, intrusion identification or/and counteractive action frameworks and
information stream inside the network.