History
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Coax cables are capable of transmitting radio frequency (RF) signals and have served as the backbone of communications technology for decades. From radios to telephones to televisions to computers, coax cable has seen continued use even as the technology it supports continues to evolve. Stretching back over 100 years, the origins of coax cables begin towards the end of the 19th century.
Key Takeaways
- Coaxial cable has a long history in telecommunications and signal transmission.
- Its defining construction includes a central conductor, dielectric, conductive shield, and outer jacket.
- Coaxial technology evolved to support telecommunications, broadcasting, television, RF, and other applications.
- Different coaxial cable types are designed for different frequency ranges and applications.
- RG6, RG59, RG58, and RG8 are common coaxial cable designations.
- Impedance, attenuation, and frequency are important factors when selecting coaxial cable.
- Connector selection should match the equipment and
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Ethernet cables are used to connect everything with an Internet connection today. Even wireless devices like tablets and smartphones have to connect to other devices like routers that are themselves run off ethernet. While the world wide web did not start booming until the late 90s, ethernet’s origins can be traced back to the 1970s.
Key Takeaways
- Ethernet has evolved from early 10 Mbps networks to modern multi-gigabit and high-capacity networking technologies.
- Ethernet originated as a local-area networking technology and has become a foundation of modern wired networking.
- Fast Ethernet increased speeds to 100 Mbps.
- Gigabit Ethernet increased performance to 1 Gbps.
- 10 Gigabit Ethernet provides 10 Gbps connectivity for higher-bandwidth applications.
- Modern Ethernet technologies support speeds well beyond 10 Gbps.
- Cable selection depends on Ethernet speed, distance, bandwidth, environment, and network equipment.
- Cat5e, Cat6, Cat6a, Cat7, and Cat8 are different categories of twisted-pair
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