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CS Cyber Security,
1. What would you say, are the four (4) common cyber-attacks, and what security protection
measures
should be implemented to prevent them? (2 points)
2. What are the five layers in the Internet protocol stack? What are the principal responsibilities
of each
of these layers? (2 points)
3. Suppose you would like to urgently deliver 40 terabytes (TB) data from Boston to Los
Angeles. You
have available a 100 Mbps dedicated link for data transfer. Would you prefer to transmit the data
via
this link or instead use FedEx overnight delivery (assuming a 24 hours delivery)? Please explain
and
show your work. (2 points)
4. Suppose Host A wants to send a large file to Host B. The path from Host A to Host B goes
through
three links sequentially, of rates R1 = 500 kbps, R2 = 2 Mbps, and R3 = 1 Mbps.
Host A --> R1 --> R2 --> R3 --> Host B
a. Assuming no other traffic in the network, what is the throughput for the file transfer? (2
points)
Please show your work.
b. Suppose the file is 4 million bytes. Dividing the file size by the throughput, roughly how long
will it
take to transfer the file to Host B? (2 points) Please show your work.

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  • 1. CS Cyber Security, 1. What would you say, are the four (4) common cyber-attacks, and what security protection measures should be implemented to prevent them? (2 points) 2. What are the five layers in the Internet protocol stack? What are the principal responsibilities of each of these layers? (2 points) 3. Suppose you would like to urgently deliver 40 terabytes (TB) data from Boston to Los Angeles. You have available a 100 Mbps dedicated link for data transfer. Would you prefer to transmit the data via this link or instead use FedEx overnight delivery (assuming a 24 hours delivery)? Please explain and show your work. (2 points) 4. Suppose Host A wants to send a large file to Host B. The path from Host A to Host B goes through three links sequentially, of rates R1 = 500 kbps, R2 = 2 Mbps, and R3 = 1 Mbps. Host A --> R1 --> R2 --> R3 --> Host B a. Assuming no other traffic in the network, what is the throughput for the file transfer? (2 points) Please show your work. b. Suppose the file is 4 million bytes. Dividing the file size by the throughput, roughly how long will it take to transfer the file to Host B? (2 points) Please show your work.