The DDos attack

A distributed denial-of-service (DDoS ) attack is a cyber-attack where the person or people seek to make a machine or network resource unavailable to its users , such as temporarily or indefinitely interrupting or suspending services of a host connected to the Internet . Denial of service is typically accomplished by flooding the targeted machine or resource with requests or traffic in an attempt to overload systems and prevent requests from being fulfilled.  It can be likened to a group of people crowding the entry door or gate to a shop , and not letting customers enter into the shop.
For much of Friday, many internet users, mostly on the US East Coast, suffered through downed internet service.


Amazon,
Netflix,
PayPal,
Reddit,
Spotify and
Twitter were among the more prominent sites affected, amongst others.


Dyn; DNS Company warned its customers that for the third time on Friday a distributed denial of service (DDoS) attack was under way. A little over two hours later around 6:20pm Eastern Time, the DNS company reported, “this incident has been resolved.”
A DDoS attack is a popular disruptive tactic whereby a website or service is taken down by manufactured high traffic from a widespread, large number of sources.
The internet performance management company described the attacks as “well planned and executed, coming from tens of millions of IP addresses at the same time,” in a
statement to CNBC.
Twitter, which is a client of Dyn,
tweeted at 5:23pm Eastern Time through its Twitter Support account that its DDoS attack problems were “resolved.”
WikiLeaks only added more confusion as to who might be behind the massive DDoS attack, as the whistleblowing site’s Twitter account addressed “supporters,” asking them to stop the new wave of DDoS.
“Mr. Assange is still alive and WikiLeaks is still publishing. We ask supporters to stop taking down the US internet. You proved your point,” the tweet said cryptically.
“We have begun monitoring and mitigating a DDoS attack against our Dyn Managed (Domain Name System) infrastructure. Our Engineers are continuing to work on mitigating this issue,” Dyn said on its website just before noon Eastern Time. The first attack came hours earlier, around 7:00am.
Mass cyber-attack cripples some of world’s biggest websites including Twitter, Spotify
Mr. Assange is still alive and WikiLeaks is still publishing. We ask supporters to stop taking down the US internet. You proved your point.

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