3. Firewalls a. [10pts] Why are DMZS used by businesses? Explain briefly why they are designed...

 

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3. Firewalls a. [10pts] Why are DMZS used by businesses? Explain briefly why they are designed the way they are using example from slides (placement, types of firewalls). 4. Intrusion Detection Systems a. [15pts] List the advantages of a signature-based IDS vs. an anomaly-based IDS b. [15pts] List the advantages of an anomaly-based IDS vs. a signature-based IDS c. Using this table of file frequencies for what is normal: HO H1 H2 .1 .38 364 H3 .156 The new observed file frequencies are A0=.05, A1=.25,A2=.25,A3=.45 i. [20pts] Is this normal for Alice? (once again assume .1 is the threshold) 3. Firewalls a. [10pts] Why are DMZS used by businesses? Explain briefly why they are designed the way they are using example from slides (placement, types of firewalls). 4. Intrusion Detection Systems a. [15pts] List the advantages of a signature-based IDS vs. an anomaly-based IDS b. [15pts] List the advantages of an anomaly-based IDS vs. a signature-based IDS c. Using this table of file frequencies for what is normal: HO H1 H2 .1 .38 364 H3 .156 The new observed file frequencies are A0=.05, A1=.25,A2=.25,A3=.45 i. [20pts] Is this normal for Alice? (once again assume .1 is the threshold)