Test Out Lab Sim 1 - Test Out Lab Sim 2 PDF

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2.2.2 Coaxial Cable Facts Coaxial cable is a relatively old technology that is usually implemented with a bus topology. It is not suitable for ring or star topologies because the ends of the cable must be terminated. In this lesson you will learn about: Coaxial cable components Coaxial cable advantages and disadvantages Coaxial cable grades

Coaxial Cable Components Coaxial cable has the following components: Two concentric metallic conductors The inner conductor is a solid wire made of copper or copper-coated tin. The outer mesh conductor, or shield, is made of aluminum or tin-coated copper. An PVC plastic insulator, which surrounds the inner conductor and insulates the signal from the mesh conductor. A PVC plastic cable sheath, or jacket, that surrounds and protects the wire.

Coaxial Cable Advantages and Disadvantages Coaxial cable has the following advantages and disadvantages: Advantages

Disadvantages More expensive than UTP Inflexible construction (more difficult to install) Unsupported by newer networking standards

Highly resistant to EMI (electromagnetic interference) Highly resistant to physical damage

Coaxial Cable Grades Coaxial cable grades include: Grade

Uses

Resistance Rating

RG-58

10Base2 Ethernet networking (also called thinnet)

50 ohms

RG-59

Cable TV and cable networking

75 ohms

RG-6

Cable TV, satellite TV, and cable networking

75 ohms

When using coaxial cables, it is important to use cables with the same resistance (impedance) rating.

Coaxial Cable Connectors The following table describes the types of connectors used with coaxial cable: Connector F-Type

Description Twisted onto the cable or installed using a compression tool Used to create cable and satellite TV connections Used to connect a cable modem to a broadband cable connection

BNC Molded onto the cable Used in 10Base2 Ethernet networks

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