Crossword puzzle clue "one way to answer a server"

One way to answer a server?

Answer, when pointing to this answer, to the question "Which letters answer this clue?"

What the start of each starred answer is part of, for a company that intersects that answer

"Did you figure out the answer to this clue?" answer

One way to answer a question

Following a command hidden in this answer, convention handouts; following the command another way, one flaunting their friends

"One ___ or two?" (tea server's question)

What one communicates to a server