Which two cable specifications are used for coaxial cable?

The correct answer highlights two important cable specifications that pertain specifically to coaxial cable: 10Base-5 and 10Base-2.

10Base-5, also known as "thicknet," represents a version of the Ethernet standard that uses a thick coaxial cable. It was one of the earliest forms of Ethernet and could support a maximum segment length of 500 meters. This type of cable has a thicker diameter compared to standard cables, providing better resistance to external interferences.

10Base-2, known as "thinnet," is another specification that uses a coaxial cable but is thinner than 10Base-5. It supports a maximum segment length of 185 meters and is more flexible, making it easier to work with in various environments.

Both of these specifications are integral parts of early networking technology, allowing for data transmission over coaxial cables in local area networks (LANs). They highlight the evolution of Ethernet technology before the shift to twisted-pair and fiber-optic cables became prevalent.

The other options listed relate to different types of cabling and networking standards that do not correspond to coaxial cable specifications, focusing instead on twisted pair or fiber optic technologies.