Category 1 and 2 cables may exist in which system?

Category 1 and 2 cables may exist in which system?

• A. Local area network (LAN)
• B. Private branch exchange (PBX)
• C. Fiber optic networks
• D. Wireless networks

Answer: (B)

Category 1 and 2 cables are older, voice-grade copper wiring used for telephone circuits. They’re not used for modern data networks. A private branch exchange (PBX) is a business telephone system that connects internal phones and handles external lines, and historically it relied on that kind of copper cabling to carry voice signals. Local area networks typically use higher‑grade twisted-pair cables (like Category 5/6) or fiber for data, fiber optic networks use light-transmitting cables, and wireless networks don’t depend on copper cables at all. So these Category 1 and 2 cables are most commonly found in a PBX environment.

Category 1 and 2 cables are older, voice-grade copper wiring used for telephone circuits. They’re not used for modern data networks. A private branch exchange (PBX) is a business telephone system that connects internal phones and handles external lines, and historically it relied on that kind of copper cabling to carry voice signals. Local area networks typically use higher‑grade twisted-pair cables (like Category 5/6) or fiber for data, fiber optic networks use light-transmitting cables, and wireless networks don’t depend on copper cables at all. So these Category 1 and 2 cables are most commonly found in a PBX environment.