Question

Answer the following two questions:

• Leonard Kleinrock is a professor of computer science at the University of ___________.
• According to Kleinrock, who inspired him the most professionally?
• The following are applications in which different performance requirements are illustrated, according to the required readings: Internet telephony, video conferencing, video streaming, cyber-physical control, and online gaming. (True or False)
• Link scheduling algorithms determine the order of packets on the _________ link.
• According to the required reading, which of the following is not a desirable property of secure communication:
  • Confidentiality
  • Message integrity
  • Cryptographic technique
  • End-point authentication
  • Operational security
• Denial-of-service (DoS) attacks aim at making certain resources unavailable to a botnet. (True or False)
• Cryptography has a long history dating back at least as far as Julius Caesar. (True or False)
• Which of the following is where cryptography translates information?
  • Ciphertext
  • Cleartext

Answer 1

SOLUTION:-

SOLUTION:- QUESTION: Leonard Kleinrock is a professor of computer science at the University of ANSWER: Leonard Kleinrock is a professor of computer science at the University of California, Los Angeles (UCLA). EXPLANATION: Leonard Kleinrock, A professor at UCLA's Henry Samueli School of Engineering and Applied Science. The first message was sent over the ARPANET from computer science Professor Leonard Kleinrock's laboratory at University of California, Los Angeles (UCLA) to the second network node at Stanford Research Institute. QUESTION: According to Kleinrock, who inspired him the most professionally? ANSWER: According to Kleinrock, Mr. Smith inspired him the most professionally. EXPLANATION: Mr. Smith who taught Kleinrock AC theory and Mr. Smith was a role model for Kleinrock. Mr. Smith wore a bow tie, so Kleinrock started wearing a bow tie. QUESTION: Link scheduling algorithms determine the order of packets on the ANSWER: Link scheduling algorithms determine the order of packets on the Output link. EXPLANATION: Link scheduling algorithms such as FIFO (First-in-First-out), SP (Static Priority), and WRR (Weighted Round Robin) determine the order of packet transmission at the output link of a packet switch. QUESTION: which of the following is not a desirable property of secure communication: ANSWER: Cryptographic technique is not a desirable property of secure communication. EXPLANATION: Desirable properties of a secure communication are given below: Confidentiality: The messages should be encrypted; only the sender and receiver should be able to understand it. Message integrity: The content of the messages should not be altered. End-point authentication: Both sender and receiver should be able to confirm the identity of the other party involved in link the communication. Operational security: Networks should be protected from attackers.

QUESTION: Denial-of-service (DoS) attacks aim at making certain resources unavailable to a botnet. ANSWER: FALSE EXPLANATION: Denial-of-service (DoS) attacks aim at making certain resources unavailable to legitimate users DDoS attack involves multiple connected online devices, collectively known as a botnet, which are used to overwhelm a target website with fake traffic and Botnet is what makes a DDoS attack, so the given statement is false. QUESTION: Cryptography has a long history dating back at least as far as Julius Caesar ANSWER: TRUE EXPLANATION: Caesar Cipher is an older and since outdated encryption technique used by Julius Caesar to "hide messages he sent to his troops. Using Caesar Cipher, each letter in the alphabet is translated to a letter with the same given offset from the original letter. Characters that are not A-Z remain as is. For e.g., if the message is HI ZOE and the offset is 2, then the encrypted message isIK BQG, since the letter "J" is two letters after "H" in the alphabet, and "K" is two letters after "" in the alphabet, etc. Notice that since "Z" is at the end of the alphabet and the offset is 2, the algorithm has to wrap back around to the beginning of the alphabet so that "Z" translates to "B

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