Greaterheights

Everyone who frequents underground forums is cybercriminal or intends to be one. - Answer-False For DDoS traceback (Savage et al. '00) a path can be reconstructed even if just one packet through the path is obtained. - Answer-False If a botnet uses randomly generated domains each day for command-and-control (C&C), then there is no way to detect and block the C&C domains. - Answer-False DoS attacks always use spoofed IP addresses. - Answer-False For DoS mitigation, a SYN Cookie ensur...

T/F: An amplification attack occurs when an attacker sends a small number of packets to elicit a much larger response from a server or service, overwhelming the intended target. - Answer-true T/F: TCP has the necessary safeguards in place to prevent network DoS - Answer-false Which of the following actors are part of the cyber crime underground economy? - exploit developers - botnet masters - spammers - all of the above - Answer-all of the above Which of the following is/are NOT a p...

T/F: An attacker that uses large botnet to make requests to a server to flood is an example of amplification attack. - Answer-True T/F: Unlike UDP, TCP has the necessary safeguards in place to prevent network DoS. - Answer-False Which of the following actors are part of the cyber crime underground economy? Exploit Developers Botnet Masters Spammers All of the above - Answer-All of the above Which of the following is/are NOT a potential network DoS mitigation? Select multiple. C...

Random Scanning - Answer-Each comprised computer probes random addresses Permutation Scanning - Answer-All comprised computers share a common psuedo-random permutation of the IP address space Signpost Scanning - Answer-Uses the communication patterns of the comprised computer to find a new target Hit List Scanning - Answer-A portion of a list of targets is supplied to a comprised computer Subnet Spoofing - Answer-Generate random addresses within a given address space Random Sppofi...

c - Answer-centrifugal pumps convert rotating mechanical energy into kinetic energy then a) discharge the kinetic energy b) back to mechanical energy c) into potential energy in the form of pressure d) into centrifugal force b - Answer-a volute type pump a) is a positive displacement pump b) has spiral casing with an increasing cross sectional area c) reduces velocity in the discharge nozzle d) is a regenerative type pump a - Answer-pump wear rings are installed on an i...

What are 2 basic forms of energy ? - Answer-Heat energy, mechanical energy What are the 2 types of reciprocating compressors? - Answer-Piston and diaphragm What is viscosity? - Answer-A fluids resistance to flow. What are the 4 types of drivers - Answer--Steam Turbines -Gas Fired Turbines -Electric Motors -Gasoline and Diesel Engines What is temperature? - Answer-A measurement in degrees of how hot or cold something is. How are compressors rated? - Answer--Discharge Pressure- (...

Centrifugal pumps do not develop good suction lift because: a. Atmospheric pressure is usually too low b. The pumped medium relative density is too high c. Their internal component clearances are too high d. The speed is too low - Answer-C The capacity of a centrifugal pump should only be reduced by: a. Throttling the suction valve b. Closing the suction valve c. Closing both suction and discharge valves d. Opening the pump casing vent valve e. Throttling the discharge valve. - Answe...

What's the difference between Static and Dynamic conditions in a pump? - Answer-Static - when the pump is not running Dynamic - when the pump is running What is packing material and how is it used? - Answer-A flexible material cut into rings and placed inside the stuffing box to help seal the liquid inside of the pump. What are the two types of lubrication systems for pumps? - Answer-Passive and forced lube systems Name some anti-friction Bearings used on pumps. - Answer-Ball, Roller,...

For average operating conditions, it is recommended that 1 ounce of grease be added at what monthly intervals? - Answer-3 to 6 The mechanism or linkage that transmits the mechanical power developed by the prime mover is also known as what? - Answer-Drive How does the diesel engine produce combustion? - Answer-Heat of compression (True or False) Pumps are used to move only water that flows or can be made to flow. - Answer-FALSE Rotary pumps are classified by the type of _____. - Answe...

Portable air compresser units or AC units - Answer-What are rotary screw pumps used for? 360 - Answer-How many degress does the essentric rotate to complete one cycle? Single acting piston compressors - Answer-Simplest form of compressors Rotary screw, sliding vane, liquid ring, lobe - Answer-Types of PD compressors Prevent gas leakage - Answer-Purpose of seal on compressors Receiver, oil reservoir - Answer-Where do you check for water on a compressor Purpose of piston rings - ...