A NAT-enabled home router translates between a private home network and the public Internet. When a device inside the home network sends a packet outward, which fields in the packet does the NAT typically rewrite?

Suppose a research group designs NextTransport, a new transport protocol that is provably faster and more efficient than TCP under every measured workload. Based on EvoArch’s reasoning, why might NextTransport still fail to gain wide adoption on the Internet?

Assume that a flow has been idle for some time, so its bucket is FULL (B tokens). A burst of traffic arrives. What happens?

Scenario in the fixed-stride trie figure: a lookup traverses to a node labeled ‘none’. What value does the LOOKUP itself return?

Both firewalls and NAT boxes are considered violations of the end-to-end principle. What is the shared reason?

TCP Reno’s cwnd is currently 16 packets when a triple-duplicate-ACK loss event occurs. What does cwnd become immediately afterward?

AS X announces p to the route server, but X has configured an export filter blocking AS Z. What does AS Z see?

Why does the count-to-infinity scenario take MANY iterations to converge instead of jumping straight to the correct 51?

In the hot-potato figure, a router in Dallas has two equally good BGP routes leaving the AS — via San Francisco (IGP cost 9) and New York (IGP cost 10). Which egress does the router pick, and why?

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