CST 311 - Intro to Computer Networks - Week 6

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This week in CST-311, I learned about two main approaches to structuring the network control plane: per-router control (traditional) and logically centralized control, also known as Software Defined Networking (SDN). We learned about algorithms used in networking such as link-state algorithms, where each router has complete information about the network's topology, and distance vector algorithms, where routers exchange information iteratively with their neighbors. We learned about the differences between static and dynamic control, with static systems changing slowly over time and dynamic systems updating more frequently.


Additionally, we covered intra-AS and inter-AS routing, highlighting protocols like OSPF (Open Shortest Path First) for intra-domain routing and BGP (Border Gateway Protocol) for inter-domain routing. Intra-AS routing is used within autonomous systems, while inter-AS routing is used for communication between different autonomous systems. We also covered SDN, where a centralized controller manages network states and interacts with switches using protocols like OpenFlow. Lastly, I learned about ICMP (Internet Control Message Protocol), which is used to communicate network-level information between hosts and routers. This week's material gave me a solid understanding of different routing mechanisms and their practical applications in modern networks.


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