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“Forwarding” refers to:    

The switching fabric is the internal “network inside the router” that moves packets from inputs to outputs.    

You’re designing a new video-call application and considering where to implement reliability (handling loss, retransmissions, and reordering). Which design choice best reflects the end-to-end principle?

Which statement best describes the router control plane? 

A router/firewall must choose an action based on multiple header fields (e.g., destination prefix, source prefix, protocol/port). What best describes the problem this device is solving?  

You’re building a live voice chat application where low delay matters more than perfect reliability. Occasional lost packets are acceptable, but waiting for retransmissions would make audio choppy. Which transport protocol is the best choice?

When a packet arrives at an input port, the key step to pick an output is:

Intradomain routing focuses on finding good paths within a single administrative domain.    

The router data plane is primarily responsible for:    

During a trie-based longest-prefix lookup, the router continues walking down the trie as long as matching bits exist, while also remembering the “best match so far.” Why does it need to remember the best match?