1. Review your records regularly, safeguard personal information, and lastly only provide you personal information if you initiated contact and are absolutely sure with whom you are dealing with.
2. Hardware packet sniffing is designed to be plugged into a network and to examine it, while software packet sniffing is useing network interface to recieve every bit of network traffic that flows by.
3. Its hard to identify against keystroke logging because a device is pulgged in between the keyboard and tower, this device is hard to differ as it is in simular size and appearance to a keyboard adaptr pulg, making hard to protect yourself.