Nokia Certified Network Associate (NCNA) — Question 27

Which technologies can be used with Ethernet switches to achieve redundancy? (Choose two)

Answer options

• A. LAG
• B. OSPF
• C. RIP
• D. STP

Correct answer: A, D

Explanation

LAG (Link Aggregation Group) and STP (Spanning Tree Protocol) are both designed to provide redundancy within Ethernet networks. LAG allows multiple network connections to be combined for increased bandwidth and redundancy, while STP prevents loops in network topologies, ensuring a reliable connection. OSPF (Open Shortest Path First) and RIP (Routing Information Protocol) are routing protocols that do not directly relate to Ethernet switch redundancy.