Question: What transport layer protocol is used with SMTP? HTTP? FTP? SNMP? Why? What are the causes and results of congestion in networks? How does the

  1. What transport layer protocol is used with SMTP? HTTP? FTP? SNMP? Why?
  2. What are the causes and results of congestion in networks? How does the transport layer achieve congestion control?
  3. What do the different TCP flag settings do?
  4. How could you abuse the TCP protocol to try to identify potential vectors for a cybersecurity attack?
  5. Is TCP reliable or unreliable?
  6. Describe what a socket is and then relate it to the process of the transport layer.
  7. Understand TCP segment and the UDP segments in detail. Describe what the checksum field is used for and the source and destination ports. Why does UDP not keep track of the source and destination IP at the transport layer like TCP does?
  8. Why is a complementary bit flip problematic for checksums for error detection?
  9. Use four reasons and describe why UDP is preferable to TCP in certain situations. Why would some on demand and streaming applications still use TCP, not UDP, despite the hype about how UDP might be better for streaming?
  10. How does the TCP three way handshake work? How does TCP close the connection?
  11. What is the difference between flow control and congestion control?
  12. How does the transport layer detect congestion on the path? How does the transport layer control, avoid, or recover from congestion in a network? How does the transport layer know about and recover from lost packets? How does TCP determine the rate at which it should send?

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