CCNA Routing and Switching (legacy) — Question 109

What are two advantages of Layer 2 Ethernet switches over hubs? (Choose two.)

Answer options

• A. decreasing the number of collision domains
• B. filtering frames based on MAC addresses
• C. allowing simultaneous frame transmissions
• D. increasing the size of broadcast domains
• E. increasing the maximum length of UTP cabling between devices BC

Correct answer:

Explanation

Layer 2 Ethernet switches create separate collision domains for each port, which significantly decreases the number of collision domains, making network traffic more efficient. Additionally, they filter frames based on MAC addresses to direct traffic intelligently, unlike hubs which broadcast to all ports. The other options either incorrectly describe the function of switches or pertain to features not associated with their advantages over hubs.