"The attacker might want to get people to visit his/ her website to advertise products, opinions and manipulate polls. The attacker may use our computer and mobile devices as zombies. Distributed Denial of Service Attacks (DDoS) uses Domain Name System (DNS) where a small query with a fake sender address can result in a much larger reply," he said.
He said, "To understand this people have to understand the concept of links (hyperlinks).""The hyperlink presentation consists of two major components: The visible text that we see as WhatsappCalling.com for example and the Uniform Resource Locator (URL) that the hyperlink refers to.
He warned people to click only those links that are provided by a trusted party and not to click suspicious hyperlinks, even if they don’t look harmful.
"The best way to know about the news and updates of a product is by visiting the official website of the product," he said.
"The correct procedure to avail WhatsApp calling service is by using the instructions that are published on their official website (www.whatsapp.com).Until now, WhatsApp calling service is only available for Android and will be soon available for IOS and Windows phones," he added.
* Daily Tribune News. Monday, march 30, 2015.