data security23.1.4

Which act is the brute-force attack?

• Sending a large amount of requirements to let the web server to be overload.

• Repeating entering different passwords until enter the correct one.

• Sending out a legitimate-looking email to users.

• Compromising a computer and use the host's storage and processing power

Which one can not avoid the brute-force attack?

• Use simple password.

• Two step verification.

• Biometric password.

• Limited time of entry.

What's the difference between virus and worms?

• Virus are more professional than worms.

• Virus are more intricate than worms.

• Virus can self-replicate but worms can not.

• Virus can not stand alone but worms can.

Which feature below is the most suitable for the ransomwares?

• Self-replicate to occupy the storage in PC.

• Encrypt the file and demand paying for decryption.

• Records everything that is typed on the keyboard.

• Track user's internet surfing activities for advertising

Which one can not avoid the accidental damage?

• Back up

• Could storage

• Disk mirroring

• Shut down without checking

   

What's botnet?

• Softwares that will tell the user that there is a big problem with their computer, and they need to download something else to fix it.

• Malwares send irritating  advertisements.

• Malware will compromise a PC and use the host's storage and processing power to perform jobs.

• Providing the creator unauthorized remote access to an infected computer.

Which validation is not suitable for a candidate name validation?

• Presence validation

• Range validation

• Type validation

• Format validation

   

Which option below of checksum is in the correct order?

• Calculate value of data, recalculate, transmit, check whether match

• Check whether match, calculate value of data, recalculate, transmit

• Calculate value of data, transmit, recalculate, check whether match

• Check whether match, calculate value of data, transmit, recalculate

   

Which feature doesn’t' belongs to ARQ process?

• Use acknowledge and timeout.

• Ask for the packet to be resent when ack is positive.

• Send negative acknowledge when detecting error.

• The process will continue until the ARQ limit is reached.

What's the difference between the parity check and checksum?

• Parity check use the modulus to calculate digits.

• Parity check can be used in hexadecimal, checksum can't.

• Parity check calculates the number of 1's, checksum calculate the sum of data.

•  

  Parity check recalculate after receiving, checksum doesn't.