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...network administrator. These rules and regulations are in place to monitor and control unauthorized access, misuse, modification, or denial of the network and its resources (Simmonds, Sandilands, & van Ekert, 2004). The first phase of network security begins from user authentication, the most common form of which is a username and password. We can also call this as one factor authentication because we are using just one thing besides the username, which is the password that we already know. Similarly, another form of authentication is two-factor authentication that requires something like a security token, ATM... ?RUNNING HEAD: NETWORK SECURITY Network Security Threats and Vulnerabilities of a network...