Which feature does a RIP version 2 protocol use to prevent routing loops?
  1. Split horizon
  2. Authentication
  3. Classless masking
  4. Path Vectoring
Explanation
Answer: A - The RIP version 2 protocol prevents the router from routing loops with a feature known as “Split Horizon.”

Key Takeaway: Split horizon is a method of preventing a routing loop in a network. The basic principle use in Split Horizon is that a particular packet is never sent back in the direction from which it was received. Distance Vector routing protocols employ the split horizon mechanism to reduce the possibility of routing loops.
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