What Is Dos Attack

What Is Dos attack,

Is Dos attack can be made on webservers only or DOS attack can be made on voip(asterisk) server, mail servers etc.
pawanopensourceAsked:
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giltjrConnect With a Mentor Commented:
As Rick_O_Shay stated, DOS attacks can be made against any networked device, that also includes your desktop, your network enabled cell phone, printers, anything.

If I cause your desktop to crash, then I have denied you a service.
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aadihConnect With a Mentor Commented:
In computing, a denial-of-service attack (DoS attack) or distributed denial-of-service attack (DDoS attack) is an attempt to make a machine or network resource unavailable to its intended users...

https://en.wikipedia.org/wiki/Denial-of-service_attack >

Almost all servers can be subjects to DOS attacks.
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uescompConnect With a Mentor Commented:
Was popular way back to bring down machines using the ping command and loading packs to slow down servers to the point they are unusable, also known as the ping of death.

For instance using this command

ping -l 1024

This will ping with 1024 bytes

This article: http://en.wikipedia.org/wiki/Ping_of_death
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Rick_O_ShayConnect With a Mentor Commented:
DOS attacks can be made against any network attached device including the networking devices themselves. Some devices and firewalls have built in protections to help by dropping all similar packets received from the same source if they are above a certain threshold of time indicating that they are most likely an attack.
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