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Know chapter boundary - reference before full text reading & then use for Quick Revisions; key words to be taken care while writing answers. Do share your feed back & Wishing you Happy Reading! :) #pdf
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CA Final Paper 6 - ISCA CH 8 Emerging Technologies •1.Read this to Know the Boundary of Chapter 2. go to main materials 3.keep on revising •Concepts (images has been taken from various places) & expected Questions; •Key / Headers Points according to PM; •Reference & last min. Revision Purpose only & in no way substitute to main materials; Author: Anand V Kabra 1 1. Grid v/s Cloud; 2. Objectives of C/c; 3. C/C Architecture; 4. C/C Environment; 5. C/C Models (IaaS, Paas, SaaS) 1. Mobile Computing Concept, Benefits, Disadvantages & Issues; 2. BYOD Concepts , Benefits & Threats Social Networks Components, Types, Advantages & Disadvantages Green IT Practices Chapter Outline Anand V Kabra | 2 Anand V Kabra | 3 Anand V Kabra | 4 Cloud Computing Cloud computing refers to both the applications delivered as services over the Internet and the hardware and system software in the data centers that provide those services. Cloud is a type of parallel and distributed system consisting of a collection of interconnected and virtualized computers that are dynamically provisioned and presented as one or more unified computing resources based on service- level agreement. Extend of Grid Computing. 4 i.Improve Anywhere Access ii.To provide Access of data & Services from Anywhere Anytime iii.Decrease / Reduce the cost related to IT Power Consumption iv.To Consolidate IT Infrastructure into integrated & manageable environment v.To Scale IT Systems Cost Effectively, Quickly, Easily vi.To Provide Rapid Access to data or services vii.To create Highly Efficient IT Eco system Anand V Kabra | 5 QUE.: Cloud computing Objectives / Goals QUE.: Cloud computing Architecture Cloud Computing Environment Anand V Kabra | 6 Public Cloud = Public owned (e.g. Railways) Private Cloud Private ownership (e.g. Your own Car) Hybrid Cloud = Private + Public (e.g. Mumbai Metro… Relaince Grp. + MH Govt.) Community Cloud = Private + Private or = Shared Private (e.g. Sharing based Auto rickshaws) Types Advantages (A) Characteristics (A+D) Disadvantages (D) Private Clouds •Increased Control; •Increased Automation, decreased overheads •Tight Security; •Well Controlled; •Loose SLA •Higher Costs are involved; •Weak / Loose SLA Public Clouds •Affordable Cost; •Scalable Services; •Strict SLA; •Need not to invest in Infrastructure •High Availability; •High Scalability; •Affordable Cost; •Strengthen SLA; •Less Secured comparatively •Less Secured compared to Private; •Organization Autonomy not possible Hybrid Clouds •Highly Scalable; •Better Security than Public Cloud •Scalable; •Partially Secured; •SLA is better than Private •Complex To manage •Security features not tight as Private has; •Complex To manage Community Clouds •Collaborative Work; •Sharing of Responsibility; •Low Cost Private Clouds; •Better security than Public Clouds •Collaborative Maintenance; •Partially Secured; •Cost Effective •Security is not good as private cloud; •Organization autonomy not possible Que.: Cloud Computing Environment: Advantages & Disadvantages Anand V Kabra | 7 Cloud Computing Services / Models Anand V Kabra | 8 Cloud computing provides basically three kinds of service: SaaS: Software as a Service. Example service providers are Salesforce, Customer Relationships Management(CRM) system and Google Apps, MS Office Online. PaaS: Platform as a Service. Some example service providers are Google’s App Engine , Microsoft Azure , RightScale and SalesForce . IaaS: Infrastructure as a Service. Some of the IaaS providers are AWS, Eucalyptus, Open Stack, GoGrid and Flexiscale. Anand V Kabra | 9 Models User & Examples Services Offered Characteristics Instances IaaS (Infrastructure as service) (It is a virtualization of Physical Hardware) •System Admin •E.g. vcloud, Amazon E2C •Network •Storage •Computational •Load Balancing •Web Access •Scalable •Centralized Control •Shared Infrastructure •Metered Services •NaaS (Network) •STaaS (Storage) •DBaaS (Database) •Baas (Backend) •DTaaS (Desktop) Paas (Platform as a Service) •Application / Software Developers •E.g. Google Apps engine, •Programming Language •Application Framework •Database •Other Tools •Web Access •Scalable •Offline •All in One •Collaborative •NA Saas (Software as service) •End User / Customer •E.g. google docs, gmail •Business Services •Social Networks •Document Management •Mail Services •Web Access •Scalable •High Availability •One to many Relationship •Centralized Control •Multi Device Support •API (Application Program Interface) •Taas (Testing) •APIaaS •E-mail-aaS Que.: Cloud Computing Servicing / Models National Institute of Technology (NIT) defines Three models – IaaS, Paas, SaaS Anand V Kabra | 10 Que.: Advantages Of Cloud Computing (ABCDE) Easy Access: Anywhere Anytime Access Cost Efficient: Available at Cheaper Rates (Easy) Back & Restore: Centralized Control Almost Unlimited Storage Quick Deployment: Software can be downloaded Automatic Integration: No Need to follow manual process Que.: Characteristics Of Cloud Computing (Hint: same point as covered in C/c Service / models) High Availability: Anytime Anywhere Access High Reliability High Scalability: Large no. of resources pooled together Performance: C/c are Highly Efficient Maintenance: Centralized maintenance Pay Per Use Mode: Pay only for what you use Multi sharing: Also works in distributed mode like Grid Computing Agility: Highly Responsive servers, Pooling of resources Virtualization: No geographical locations are concerned Que: Challenges in Cloud Computing Security Prospective (from Service Provider view point) i.Confidentiality ii.Integrity iii.Availability iv.Governance v.Trust vi.Audit vii.Prone To Attacks viii.Application Security Adaption / Implementation Prospective (from End User view point)(2 +ve & 4 –ve) i.Threshold Policy: unused & additional required storage capacity ii.Hidden Costs: only Fixed cost are being informed in the beginning iii.Unexpected Behavior: iv.Inter-Operability v.Software development on Cloud vi.Environment friendly Cloud Anand V Kabra | 11 Anand V Kabra | 12 Components How it Works Benefits •Portable Devices •Mobile Software •Communication •Data Input •Server to Mobile communication •Computations on Server •Synchronization •Access to workplace details •Update work order details •Access to Corporate Information •Job / Remote Location •Decision Making Limitations Issues •Portable Devices •Mobile Software •Communication •Confidentiality •Integrity •Availability •Bandwidth •Lack of Location Intelligence •Power Banks or alternate power resources •Integration of Mainframe •Business Challenge Que.: Mobile Computing Anand V Kabra | 13 Components of WEB 2.0 For Social Networks Types / Behavior based Social Network (SN) Advantages & Disadvantages •File Sharing •Communities •Blogging •Wikis •Folksonomy / Tagging •Mash-ups •RSS •Ajax •Social Contact Network •SN for specialist group •Study Circles •Police & Military •Sports related •SN for Fine Arts •Mixed Network Advantages •Affordable Costs •Technological knowledge not required as such •Easy Adaption •No Geographical boundary Disadvantages •Privacy Issues •SN are offline •Basic facilities are not available equally round the world Que.: Web 2.0 / 3.0 & Social Networks Web1.0 : Informative / Communicative Web 2.0 : Interactive Web 3.0 : Social Networks (Defined similar to “System”) Anand V Kabra | 14 Wishing you a very happy reading tome & Thank You! 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