Simplifying Concepts

Essence of Life is in Simplicity

Difference between Connection Oriented and Connectionless

Difference between Connection Oriented and Connectionless.

Compare Connection Oriented and Connectionless.

Differentiate/Compare/ Difference between Connection Oriented and Connectionless.

Protocol/Criteria

Connection-Oriented

Connectionless

Resource Allocation:

Resources need to be allocated.

No prior allocation of resource is required.

Utilization:

It often leads to low or underutilization of resources.

It ensures optimal usage of resources.

State info:

Lot of state related information needs to be stored.

Not much of information is required as packets are sent randomly.

Reliability:

It ensures reliable transfer of data.

Reliability is not guaranteed as it is a best effort service.

Connection:

Prior connection needs to be established.

No prior connection is established.

Delay:

There is more delay in transfer of information, but once conn. established faster delivery.

However there is no delay due absence of connection establishment phase.

Packet travel:

In this packets travel to their destination node in a sequential manner.

In this packets reach the destination in a random manner.

Congestion:

Congestion is not at all possible.

It is likely that congestion occurs.

Signalling:

Connection is established through process of signalling.

There is no concept of signalling.

Suitability:

It is suitable for long and steady communication.

It is suitable for bursty transmissions.

Transfer mode:

It can be implemented either using Circuit Switching or VCS.

It is implemented using Packet Switching.

Retransmission:

It is possible to retransmit the lost data bits.

It is not possible.

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Difference between Ebusiness and Ecommerce

Difference between Ebusiness and Ecommerce.

Compare Ebusiness and Ecommerce.

Differentiate/Compare/ Difference between Ebusiness and Ecommerce.

Ebusiness & Ecommerce

Ebusiness & Ecommerce

ECommerce

EBusiness

Ecommerce involves commercial transactions done over internet.

Ebusiness is conduct of business processes on the internet.

Ecommerce is subset of Ebusiness.

Ebusiness is superset of Ecommerce.

Ecommerce is use of electronic transmission medium that caters for buying and selling of products and services.

In addition, Ebusiness also includes the exchange of information directly related to buying and selling of products.

Thus, Those activities which essentially involve monetary transactions are termed as “e-commerce”.

In addition it includes activities like procurement of raw materials or goods, customer education, looking for suppliers etc.

Ecommerce usually requires the use of just a Website.

Ebusiness involves the use of CRM’s, ERP’s that connect different business processes.

Ecommerce covers outward facing processes that touch customers,suppliers and external partners.

E-business covers internal processes such as production, inventory management, product development, risk management, finance etc.

Ecommerce just involves Buying and selling of products and services.

Ebusiness includes all kinds of pre-sale and post-sale efforts.

Ecommerce is narrower concept and restricted to buying and selling.

It is a broader concept that involves market surveying, supply chain and logistic management and using Datamining.

It is more appropriate in B2C context.

It is used in the context of B2B transactions.

Ecommerce involves the mandatory use of internet.

Ebusiness can involve the use of internet, intranet or extranet.

Example- Buying of pendrive from Amazon.com is considered Ecommerce.

Example- Using of Internet by Dell, Amazon for maintaing business processes like Online customer support, email marketing, suplly chain management.

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Difference between internet intranet and extranet

Difference between internet intranet and extranet
Compare internet, intranet and extranet.

Differentiate/Compare/ Difference between internet intranet and extranet

Internet-Intranet-Extranet

Internet, Intranet & Extranet

Internet

Intranet

Extranet

It is a Global system of interconnected computer network.

It is a Private network specific to an organisation.

It is a Private network that uses public network to share information with suppliers and vendors.

Not regulated by any authority.

It is regulated by an organization.

It is regulated by multiple organization.

Thus content in the network is accessible to everyone connected.

Thus content in the network is accessible only to members of organization.

The content in the network is accessible to members of organization & external members with access to network.

It is largest in terms of number of connected devices.

It is small network with minimal number of connected devices.

The number of devices connected is comparable with Intranet.

It is owned by no one.

It is owned by single organization.

It is owned by single/multiple organization.

It is means of sharing information throughout the world.

It is means of sharing sensitive information throughout organization.

It is means of sharing information between members and external members.

Security is dependent of the user of device connected to network.

Security is enforced via a firewall.

Security is enforced via a firewall that separates internet & extranet.

Example: What we are normally using is internet.

Example: TCS using internal network for its business operations.

Example: HP and Intel using network for business related operations.

Users can access Internet anonymously.

Users should have valid username/password to access Intranet.

Users should have valid username/password to access Extranet.

Internet is unregulated and uncensored.

But Intranet is regulated by the organization policies.

Extranet is also regulated by contractual agreements between organizations.

Contributed by: Abishek Ganesh


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Load and Stress Testing

Difference between Load and Stress Testing?
Compare Load and Stress Testing?

Differentiate/Compare/ Difference between Load and Stress Testing.

Load Testing

Stress Testing

Suppose, if an application is built for 500 users, then in load testing we check for up to 500 users.

Suppose, if an application is built for 500 users, then in stress testing we check for greater than 500 users

It helps us to study the behaviour of application under loads.

It helps us to study the breaking point of the system/ server.

It determines the reliability of the application.

It determines the stability of the application.

The parameter under focus is the response time.

The parameter under focus is the throughput.

Load testing is subset of Stress testing.

Stress testing is superset of Load testing.

Load testing is done to ensure that the system meets the specified load. (I.e. whether system has load bearing capacity.)

Stress testing ensures whether the application meets the unexpected loads.

Testing the app with maximum numbers of users and input is load testing.

Testing the app with more than maximum number of users & inputs is stress testing.

Load tests are more formal and usually predefined by client and domain experts.

It is informal and is needed to overcome & understand erroneous situations possible.

It is called operational capacity testing.

It is also sometimes called torture testing.

Load testing could be considered like a non destructive test.

Stress testing is considered like a destructive test.

It involves maximal utilization of resources.

It involves denial or unavailability of resources.


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Static and Dynamic Testing

Difference between Static and Dynamic Testing?
Compare Static and Dynamic Testing?

Differentiate/Compare/ Difference between Static and Dynamic Testing.

Static Testing

Dynamic Testing

It is testing without executing the software.

It is testing that involves the execution of software.

It can start early in the software lifecycle.

It can start after the development of software component.

Software is examined manually and some static analysis tools are used.

In this by giving inputs, its outputs are examined & compared with what is expected.

Review, inspection and meetings come under static testing.

Unit, Integration, System & acceptance testing come under dynamic testing.

It involves finding bugs before compiling.

It involves finding bugs after compile & linking.

It is about prevention.(Preventing errors from being occuring)

It is about cure.(It allows to figure out errors and fix them)

It is more cost effective.

It is not cost effective.

It is done usually in verification stage.

It is done usually in validation stage.

It guarantees 100% statement coverage.

It does not guarantee complete code coverage.

More reviews and comments (on source code) are highly recommended for good quality software.

More defects (uncover) and its correction is highly recommended for the good quality software.

Missing requirement, design defect and syntax errors are the defects found in this testing.

Variable not constant, functionality missing are kind of defects found in dynamic testing.


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