الفهرس 
Denial and Distributed Denial of Service Attacks (DoS and DDoS)Only 14 pages are availabe for public view
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Abstract
In recent years’ network attacks disturb the integrity and the authenticity of data. Aport scan is acommon technique which hackers use to discover open doors or weak points in anetwork. When hackers send message to a port, the response they receive determines whether the port is being opened and if there are any potential weakness that could be exploited.