CCNA: Cisco Certified Network Associate — Question 436

What is a similarity between 1000BASE-LX and 1000BASE-T standards?

Answer options

• A. Both use the same data-link header and trailer formats.
• B. Both cable types support RJ-45 connectors.
• C. Both support up to 550 meters between nodes.
• D. Both cable types support LR connectors.

Correct answer: A

Explanation

The correct answer is A because both 1000BASE-LX and 1000BASE-T utilize the same data-link header and trailer formats as part of the Ethernet standard. The other options are incorrect because 1000BASE-LX uses fiber optic cables, while 1000BASE-T uses copper cables with RJ-45 connectors, and they have different maximum distances and connector types.