The phrase "attack knocking" is not correct and does not convey a clear meaning in written English.
It may be intended to describe a type of action or event, but without additional context, it is ambiguous and unclear.
Example: "The sudden attack knocking at the door startled everyone in the room."
Alternatives: "assault on the door" or "forceful knocking".
The attack knocked out all county email services and forced the sheriff's department to revert to recording arrests and jail bookings on paper.
The lawyer, Zheng Enchong, who has lived under house arrest for several months, has been seriously injured by plainclothes police officers who, in one attack, knocked him down, then repeatedly hoisted his body parallel to the ground and dropped him on the concrete, people who have visited him said.
A massive distributed denial of service (DDoS) attack knocked offline at least 68 Philippine government websites in July, apparently in response to an international court ruling that denied China's territorial claims in the region.
After a distributed denial-of-service attack knocked some servers offline during a local election in Tennessee this week, Knox County is working with an outside security contractor to investigate the cause.
The Okan facility, which it operates in conjunction with the Nigerian National Petroleum Corp., is also a gathering point for production from several fields, so the attack knocked off output from all of them at once.
I shot the cub first, but this made its mother so angry that she attacked, knocking my friend Lester down.
Okay, the site is up with all the bandwidth it needs, but then hackers launch denial-of-service attacks, knocking out the site for days.
Six months after the indictment was unsealed, in January 2012, Anonymous launched one of its largest attacks, knocking offline the Justice Department's website in protest of the U.S. government's arrest of leaders of Megaupload.com, a file-sharing site that allegedly facilitates Internet piracy.
But they did, and government attacks knocked out phone service.
Fighting here, including insurgent bomb attacks, knocked out most of the provincial capital's communications to the outside world, and U.S. forces were able to restore a vital fiber-optics cable only this month.
