"차폐 Ethernet 케이블이 필요하다" — 실제로 중요한 때
STP vs UTP 이더넷 케이블: 대부분의 가정은 차폐가 필요하지 않으며, 부적절한 차폐는 오히려 문제를 일으킬 수 있습니다.
## The Myth
Shielded (STP/FTP) Ethernet cable is always better than unshielded (UTP).
## The Reality
For most homes and offices, **unshielded Cat6/Cat6a is fine**.
## When You DO Need Shielding
- Running cable parallel to power lines (within 30cm)
- Industrial environments with heavy electromagnetic interference
- 10 Gbps runs over 55m+ (Cat6a STP recommended)
- Data centers and server rooms
## When Shielding HURTS
Improperly grounded shielded cable is **worse** than unshielded because:
- The shield becomes an antenna for interference
- Ground loops between devices cause noise
- You need shielded jacks, patch panels, and proper grounding throughout
## Recommendation
- **Home/Office**: Cat6a UTP (unshielded) — sufficient for 10 Gbps
- **Near power cables**: Cat6a F/UTP (foil shield, simpler grounding)
- **Industrial/Datacenter**: Cat6a S/FTP with proper grounding