What is the proper response for a NULL scan if the port is closed?

Jimmy, an attacker, knows that he can take advantage of poorly designed input validation routines to create or alter SQL commands to gain access to private data or execute commands in the database. What technique does Jimmy use to compromise a database?

Neil is closely monitoring his firewall rules and logs on a regular basis. Some of the users have complained to Neil that there are a few employees who are visiting offensive web site during work hours, without any consideration for others. Neil knows that he has an up-todate content filtering system and such access should not be authorized. What type of technique might be used by these offenders to access the Internet without restriction?

Exhibit

Study the log given in the exhibit,
Precautionary measures to prevent this attack would include writing firewall rules. Of these firewall rules, which among the following would be appropriate?

What is the disadvantage of an automated vulnerability assessment tool?