Cloud ComputingSagarmatha Engineering College Sanepa, Lalitpur, Nepal

What is …

▪ What is cloud?▪ What is computing?▪ What is cloud computing?

BEFORE that…

History

▪ 1980’s computer in houses▪ 1990’s Graphical user interface▪ 2000’s internet▪ From size of an hall to hand held devices▪ Standalone to network▪ Internet is source of information▪ Information communication changing and

shaping modern world

Cloud Computing

▪ Cloud has often been used as a metaphor for Internet in the network diagram

▪ Use of computing resources (hardware and software) which are delivered as a service over a network

▪ Distributed computing on internet Or delivery of computing service over the internet

▪ Example: Yahoo!, GMail, Hotmail instead of running an email program on your computer, you login to a web email account remotely

Cloud computing cont.…

▪ Cloud computing is an umbrella term used to refer to Internet based development and services

▪ Remotely hosted: Services or data are hosted on remote infrastructure / Off shore servers and location

▪ Ubiquitous: Services or data are available from anywhere.

▪ Commodified: The result is a utility computing model similar to traditional that of traditional utilities, like gas and electricity - you pay for what you would want!

▪ Not limited to borders and its extension can reach any part of the world with internet connectivity

Basic Cloud Characteristics

▪ NO-NEED-TO-KNOW

▪ FLEXIBILITY AND ELASTICITY

▪ PAY AS MUCH AS USED AND NEEDED

▪ ALWAYS ON!, ANYWHERE AND ANY PLACE

Do you Use the Cloud?

Service model of cloud computing

▪ Infrastructure as a service (IAAS)▪ Software as a service (SAAS)▪ Platform as a service (PAAS)

Infrastructure as a service (IAAS)

▪ a type of cloud computing in which a third-party provider hosts virtualized computing resources over the Internet

▪ a form of cloud computing that provides virtualized computing resources over the Internet

Software as a service (SAAS)

▪ Applications hosted by a provider on a cloud infrastructure are accessed from thin or thick clients over the network or a program interface

▪ a software distribution model in which applications are hosted by a vendor or service provider and made available to customers over a network, typically the Internet

Platform as a service (PAAS)

▪ Providers deliver not only infrastructure but also middleware (databases, messaging engines and so on) and solution stacks for application build, development and deploy

Security issues

Denial of service

Man-in-the-middle

Impersonation

Threats and attacks

Thank You!Queries and Suggestions????