JNCIA-Junos: Juniper Networks Certified Associate – Junos (2024) — Question 10

Which two statements are correct regarding Layer 2 network switches? (Choose two.)

Answer options

• A. Switches flood broadcast traffic.
• B. Switches are susceptible to traffic loops.
• C. Switches do not learn MAC addresses.
• D. Switches create a single collision domain.

Correct answer: A, B

Explanation

Option A is correct because switches do indeed flood broadcast traffic to all ports except the originating port. Option B is also correct as switches can experience traffic loops if there are redundant paths without proper protocols like Spanning Tree Protocol (STP). Options C and D are incorrect because switches do learn MAC addresses and they create a separate collision domain for each port.