C. IP spoofing is a common practice when DoS tools are used to help the attacker mask his identity. Salami attacks, data diddling, and keystroke logging do not typically spoof IP addresses, so answers A, B, and D are incorrect. Solution C. IP spoofing is a common practice when DoS tools are used to help the attacker mask his identity. Salami attacks, data diddling, and keystroke logging do not typically spoof IP addresses, so answers A, B, and D are incorrect..