Question

Problem 1: How many hosts can a network with the following network ID 192.115.231.150/25 accommodate? (3 points) Problem 2: Explain how UDP scanning works and list all problems associated with it from the attacker's perspective? (6 points) Problem 3: List two defenses against non-spoofed flooding attacks. Can such attacks be entirely prevented? (4 points) Problem 4: What would be the best attack/malicious recourse to take a website down and explain why? (3 points)

Answer 1

Problem-1! Network Id = 192.115.231.150/25 First 25-bit is used for Network Rest! (32-25) = 7 bit for host ad. Total up- Address - 27 = 128 from which 1st address is Network address and last i Broadcast address which is not assigned to any host . No. of hosts in a Network a 128 -2 =126 hosts Ans.

Distributed Problema: DDos Cenial of service) attack is used to take the website down the attack is co-ordinated attack on the availabity of Service on the given target system and of is launched indirectly through many compromised computer system. of Atlacker want to attack on a victim website to take it service down by using It uses the Normal set of computer (Called compromised system) which is not aware that they are involved in attack so attack is done through various computer .so, it becomes difficult to find the attackey System,