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What is the primary purpose of eBGP?  

In intradomain routing, a “good” path is typically chosen to optimize which kind of metric?    

Two routers enforce the same rate limit for a video stream. Router X causes occasional packet loss during bursts, while Router Y causes bursts to arrive but with extra delay/jitter. Which statement best explains the difference?    

What is a key reason NAT violates end-to-end connectivity?

Which statement best describes encapsulation?  

You design a new transport-layer protocol XYZ that improves performance over TCP. However, XYZ requires changes to many applications and also breaks on many NATs/firewalls unless they are upgraded. Only a small fraction of networks adopt it, and most traffic stays on TCP/QUIC. Which EvoArch explanation best fits this outcome?    

A learning bridge (Ethernet switch) starts with an entirely empty forwarding table. Host A (source) sends a frame to Host B (destination), and the frame arrives on the switch at port 3. What does the switch do first to “learn”?

In a layered Internet protocol stack, each layer provides services to the layer above and uses services from the layer below.

Even if an AS uses BGP, it still typically needs an Intradomain Gateway Protocol (IGP) to reach the selected next hop/egress router inside the AS.  

The sodium-potassium pump uses __ as the immediate source of energy.