Explanation:

Correct option 5: Black

In Cat6 Ethernet cable color standards, particularly when referring to jacket colors used for identifying cable purpose or type in networking setups, the 6th common color often used is: Black

Common Cat6 Cable Jacket Colors:

Blue – Typically used for general network connections

Yellow – Often used for POE (Power over Ethernet)

White – Common in office setups

Grey – Standard for generic or interconnect cables

Red – Frequently used for important or critical connections

Black – Often used for servers, security, or reserved systems