Developing Applications and Automating Workflows Using Cisco Platforms (DEVASC) — Question 370

What is the function of an Ethernet switch in a networking environment?

Answer options

• A. to switch a frame from one port to another port based on IP address
• B. to switch a frame from one port to another port based on MAC address
• C. to provide IP addressing to connected hosts
• D. to block unwanted traffic

Correct answer: B

Explanation

The correct answer is B because an Ethernet switch operates at the data link layer and forwards frames based on MAC addresses. Option A is incorrect as switches do not use IP addresses for frame switching, option C is wrong because that function is typically performed by a DHCP server, and option D is not the primary function of a switch, which focuses on forwarding frames rather than blocking traffic.