Floods a computer with requests until it shuts down and refuses to answer any requests for information. a) a trojan horse b) a ddos attack c) port blocking d) a polymorphic virus

Which of the following has not been attributed at least in part to social media a. drug addiction b. depression c. kidnapping d. murder

Acomputer has a two-level cache. suppose that 60% of the memory references hit on the first level cache, 35% hit on the second level, and 5% miss. the access times are 5 nsec, 15 nsec, and 60 nsec, respectively, where the times for the level 2 cache and memory start counting at the moment it is known that they are needed (e.g., a level 2 cache access does not even start until the level 1 cache miss occurs). what is the average access time?

Can someone work out the answer as it comes up in one of my computer science exams and i don't understand the cryptovariables