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

An Ethernet switch operates at Layer 2, learns MAC addresses to build a forwarding table, and floods frames whose destination is unknown or broadcast. Because it forwards frames without a TTL, redundant links can create endless Layer 2 loops unless a protocol such as STP is used.

C. Switches populate a MAC table by inspecting source MACs; they do learn addresses.

D. Each switch port is its own collision domain; therefore a switch does not create one single collision domain.

1. Juniper TechLibrary – “Understanding and Preventing Layer 2 Loops”, Junos OS Switching, ¶1-2 (2023-04-18).

2. Juniper TechLibrary – “MAC Learning Process on EX Series Switches”, step 1 (2022-11-10).

3. Juniper TechLibrary – “Collision Domains in Ethernet Networks”, §Concept (2021-06-30).