$1.$ Describe two schemes to crash a website?

$2.$ What are the differences between sniffing and spoofing? Give examples of sniffing$/$spoofing software tools.

$3.$ What is DDoS attack? How could we detect the DDoS attack? Could we prevent a DDoS attack?

$4.$ Using the Internet, describe the different between hacking, cracking, and ethical hacking? List three ways in which we could increase our protection from hackers.

$5.$ Describe how the spoofing attack can affect multiple network layers $($application$,$ transport, network, and data link layers$).$