Q. A subset of a network that includes all the routers but contains no loops is called
✅ Correct Answer: (A)
spanning tree
Explanation: spanning tree protocol (stp) is a network protocol that creates a loop free logical topology for ethernet networks. it is a layer 2 protocol that runs on bridges and switches. the main purpose of stp is to ensure that you do not create loops when you have redundant paths in your network.