This problem set has two parts. The first part contains questions on data center networks and multimedia systems. The second part analyzes the security of the TPC/IP protocol stack.

• Assume we have four racks of servers in a data center, each has 40 servers. Draw a diagram showing a two-level tree-structured data center network that connects these racks using 48-port switches. The network should have an oversubscription factor of 10. What is the smallest oversubscription factor that we can achieve with the 48-port switches?

• Problem 9.5 in chapter 9 of the [Kurose and Ross, 7th edition] textbook.

• Problem 9.11 in chapter 9 of the [KR'17] textbook.

For quick access, a screenshot of problems 9.5 and 9.11 can be found here.

Put your answers of the above three questions in one PDF file and submit it separately from your answers to the following security question.

• Analyze three different attacks on TCP: SYN Flooding, RST, and Session Hijacking attacks. Follow the instructions in this document. This document also specifies what you need to submit for this security part.