Dark energy

Dark energy

a theoretical form of energy postulated to act in opposition to gravity and to occupy the entire universe, accounting for most of the energy in it and causing its expansion to accelerate.

Usage:

Dark energy is a external force other than gravity.gravity is a purpose of giving gravity to planets likewise the dark energy is the external force which will made every planet orbit in a gravitational path and also it will handle stars in the Galaxy by without get out if it.By this we may understand that dark energy is much powerful than gravity and similar to black hole ..

By nasa,the if a light travels to the universe from Galaxy it will able to blur in particular place that place they identified dark matter by Hubble's telescope but it is invisible..This led to find many new galaxies.Many of the ancient spiritual books are given statement about the dark matter in various name

Evidence: 

At first many of the scientist are not accepting this after many experiments it will be acceptable..Sir.albert Einstein and many famous scientists are worked in this part.. Currently nada divided few group of scientist across all their stations to monitor and research about dark energy

Virtual private network

What is VPN?

A virtual private network extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. 

Origin of VPN:

For as long as the internet has existed, there has been a need for protocols to keep data private and secure. The history of VPN (virtual private network) technology dates back to 1996, when a Microsoft employee developed the peer-to-peer tunneling protocol, or PPTP. Effectively the precursor to modern VPNs, PPTP creates a more secure and private connection between a computer and the internet.

Advantages of using VPN:

• VPN is commonly present in every smart phones and PC's..
• VPN is having a secure encryption so No  one can track our ip While using open wifi our VPN can help us by protecting credentials from hackers

Usage:

• VPN is mostly used in private and government sectors
• A civilian can use VPN through some apps which will provide vpns for free

Visa, MasterCard

VISA AND MASTERCARD

Today everyone has a credit card on that credit card we all  see  the words "MasterCard and ViSa" now let us see what is that..The leading credit card companies in the world today are the competitors Visa and MasterCard.

Both Visa and MasterCard operate in a very similar way. While Visa claims to have 2.4 billion cards issued, across more than 200 countries, MasterCard avoids direct comparison by saying it processes over 18 billion payments per year. It is difficult to find any difference in the number of locations worldwide that accept the cards, which is now estimated at close to thirty million.

Visa

Visa Inc. is an American multinational financial services corporation headquartered in Foster City, California, United States. It facilitates electronic funds transfers throughout the world, most commonly through Visa-branded credit cards, gift cards, and debit cards. WikipediaStock price: V (NYSE) US$ 149.37 -0.30 (-0.20%)
3 Oct, 4:00 PM GMT-4 - Disclaimer3 Oct, 4:00 PM GMT-4 - DisclaimerCustomer service: 00 1 866-765-9644CEO: Alfred F Kelly Jr (1 Dec 2016–)Headquarters: Foster City, California, United StatesSubsidiaries: CyberSource, Authorize.Net, MORE

Mastercard:

Financial services companyMastercard Incorporated is an American multinational financial services corporation headquartered in the Mastercard International Global Headquarters in Purchase, New York, United States. The Global Operations Headquarters is located in O'Fallon, Missouri, United States, a municipality of St. Charles County, Missouri. WikipediaStock price: MA (NYSE) US$ 223.13 +0.76 (+0.34%)
3 Oct, 4:01 PM GMT-4 - Disclaimer3 Oct, 4:01 PM GMT-4 - DisclaimerCustomer service: 080010 01087Headquarters: Purchase, Harrison, New York, United StatesFounded: 16 December 1966Revenue: 1,249.7 crores USD (2017)Founders: Wells Fargo, Crocker National Bank, Bank of California, First Interstate Bancorp

Ethical hacking

Ethical hacking:
We all know what is hacking..but now we shall know about ethical hacking...it is also a type of hacking in which under a protected manner.For eg..if one want to check the protection of a server they must hire a hacker who is an expert in ethical hacking..then he will be check the full server and then he solve is there malicious activities happened.Today many hire an ethical hacker with a good salary and it is also a good job to select...

JOB OPPORTUNITIES

Even google also hire people who are in a better skill in ethical hacking u nder this categoriers

Most Popular Job for Employees with a Certified Ethical Hacker (CEH) Certification Median Salary Charts

• Information Security Analyst.
• Security Analyst.
• Certified Ethical Hacker (CEH)
• Ethical Hacker.
• Security Consultant, (Computing / Networking / Information Technology)

The Average salary for the above categorised posts are 589k

Key Stats for Certified Ethical Hacker (CEH)

Gender

Female 6 %		Male 94 %
Salary Rs 238,390 - Rs 973,738		Salary Rs 245,268 - Rs 1,080,072

Experience

• Less than 1 year
• 1-4 years
• 5-9 years
• 10-19 years
• 20 years or more
•