This week we continued to learn about computer networks and the importance of the security layer. We learned about why network security is important and how programs are written to verify communications between network connected clients. I found it particularly interesting to learn the various ways people will try to hack into communications sent between clients and deceive or block those communications. I enjoyed learning about symmetric key and private/public key encryption systems. I also found the lab this week useful in applying what was learned regarding the security layer in out simulated client/sever communications.
This week, we developed a deeper understanding of the network control plane and explored routing algorithms such as Dijkstra and Bellman-Ford, focusing on how they determine the most efficient paths for data transfer. We also learned about the SDN control plane, which allows for dynamic network management and routing. In addition to the theory learned this week, we conducted a network lab exploring the use of a basic SDN controller using Mininet and Wireshark. We looked at how Internet Control Message Protocol (ICMP), can be used for network diagnostics, particularly for network troubleshooting with tools like ping and traceroute.
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