TestOut LabSim A+ Certification Practice Exam

Which of the following is a valid MAC address?

1. 192.168.1.1

2. CO-34-FF-15-01-8E

3. 09-13-27-45-67-89

4. AA:BB:CC:DD:EE:FF

The correct answer is: CO-34-FF-15-01-8E

A valid MAC address is typically represented in a format that uses either colons or hyphens to separate six groups of two hexadecimal digits. Each group represents one byte (or 8 bits) of the MAC address. The format that includes hexadecimal digits allows for numbers from 0-9 and letters A-F, which corresponds to values in the range of 0 to 255 for each byte. The address can also be delimited by either hyphens or colons. In this case, the address represented as CO-34-FF-15-01-8E does not adhere to the correct hexadecimal format because "C" is not a valid hex digit; valid hex digits are limited to 0-9 and A-F. Therefore, this option does not qualify as a valid MAC address. On the other hand, the representation 09-13-27-45-67-89 follows the proper structure for a MAC address and is comprised solely of valid hexadecimal digits. Each part of the address is two digits long, making it a valid format. Similarly, the address AA:BB:CC:DD:EE:FF is also properly formatted with valid hexadecimal digits, with colons separating the groups. Hence, the valid MAC