What device separates a single network into two segments but lets the two segments appear as one to higher protocols?

What device separates a single network into two segments but lets the two segments appear as one to higher protocols?

  1. a) Switch
  2. b) Bridge
  3. c) Gateway
  4. d) Router

From the BREB Assistant Junior Engineer (IT) 2019 – Preliminary exam, question 17 of 20.

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