Crossword clues for the word: TCP The word TCP has appeared as an answer to at least 7 crossword clues on different crossword puzzles. Crossword clues for TCP Showing 1 to 7 of 7 results Clue(s) ___/IP ___/IP (Internet protocol) Abbreviation for a protocol that controls transmissions Auto-flow center: Abbr. Conversation over internet protocol (abbr) Gasoline additive: Abbr. Highway-flow center: Abbr.