• DNS attacks: Domain hijacking: Domain hijacking is defined as changing the name of a domain without the knowledge or permission from the domain’s owner or creator. This enable the intruders to access the sensitive information. Cross site scripting: It is a type of attack in which user enters right URL of a website and hacker on the other site redirect the user to its own website and hack its credentials. • IP spoofing: DOS attack: When hackers overflows a network server or web server with frequent request of services to damage the network, the denial of service cannot keep up with them, server could not legitimate client regular requests. • Man in the middle attack: This is another issue of network security that will happen if secure socket layer (SSL) is not properly configured. • Network Sniffing: Another type of attack is network sniffer, it is a more critical issue of network security in which unencryp