Lec 15: Network Security II: Denial of Service (DoS) and DNS Flashcards by Lea Lacson

Q

What is a denial-of-service attack? What are the two types?

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Q

How is the first step of DOS done?

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Q

How is the second step of DOS done?

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Q

How is the third step of DOS done?

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Q

How is the fourth step of DOS accomplished?

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Q

How is the fifth step of DOS accomplished?

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Q

How prevelant are DOS attacks?

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Q

How did UCSD find a good estimate for how prevelant are DOS attacks?

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Q

How did UCSD’s way of finding how many DOS attacks work?

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Q

How does random IP spoofing produce random backscatter?

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Q

How do you analyze backscatter?

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Q

What is victim characterization by DNS name/

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Q

Who is a target to DOS?

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Q

What to do against DOS attacks?

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Q

How do you prevent address spoofing with filtering and SYN cookies?

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Q

How do you prevent address spoofing with Puzzles and CAPTCHAs?

A

Q

How do you prevent address spoofing with TTL filtering?

A

Q

How do you prevent address spoofing with traceback?

A

Q

How do you prevent address spoofing with packet filtering?

A

Q

How can you prevent DOS with buying more resources?

A

Q

What are the two types of modern DoS?

A

Q

What is a reflection attack?

A

Q

Why is DoS such a hard problem to solve?

A

Q

Why do we use DNS?

A

What is the DNS?

What are DNS Root Name Servers?

What is a DNS lookup example?

What is DNS chaching?

What are basic DNS vulnerabilities?

What is a DNS Packet?

What is the resolver to NS request?

What is the response to resolver?

What is baliwick checking?

What is DNS cache posoning?

- succcess aftr about 256 tries (a few minutes)

What are defenses to DNS cache poisoning?

What do you do with DNS poisoning?

What allows attackers to "poison" DNS?