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Sniffing and spoofing, hackers and prevention

Q1: What does the term Sniffing in the context of network security mean? How does sniffing differ from spoofing? Is one more dangerous than the other? Explain your answer.

Q2: What is a Hacker? List at least three classic motivators of a hacker? Define three of the historical hacking techniques. What steps may be taken to prevent hacking of your personal computer system?

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From the following Web site: http://www.techiwarehouse.com/engine/423a5281/IP-Spoofing-and-Sniffing-
Sniffing is searching and looking for data, and it is a passive attack. Spoofing is one machine representing itself as a secure, authorized member, and is an active, harmful attack.
Quoted from the article:
Sniffing is a passive security attack in which a machine separate from the intended destination reads data on a network. The term "sniffing" comes from the notion of "sniffing the ether" in an Ethernet network and is a bad pun on the two meanings of the word "ether." Passive security attack are those that do not alter the normal flow of data on a communication link or inject data into the link. Spoofing is an active security attack in which one machine on the network masquerades as a different ...

Solution Summary

Definition and discussion of sniffing and spoofing, hackers and how to prevent them, with URL references.