Cisco® CCNA Exam Cram Notes : Single-mode fiber, multimode fiber,copper

I. Networking Fundamentals

3. Compare physical interface and cabling types

3.1 Single-mode fiber, multimode fiber,copper

Cabling and Infrastructure: Media is the actual physical environment through which data travels as it moves from one component to another, and it connects network devices. The most common types of net-work media are twisted-pair cable, coaxial cable, fiber-optic cable, and wireless. Each media type has specific capabilities and serves specific purposes.

Twisted-pair cable: Twisted-pair is a copper wire-based cable that can be either shielded or unshielded. Twisted- pair is the most common media for network connectivity.

STP stands for Shielded Twisted Pair and UTP stands for Unshielded Twisted Pair.

Shielded Twisted Pair(STP): STP cables reduce electrical noise and electromagnetic radiation. In other words, they help to keep the signal steady, and reduce interference with other devices. Given below is a diagram showing a typical shielded twisted pair cable

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CCNA Cram Notes Contents
  • I. Networking Fundamentals
  • II. Cisco IOS
    • 1. Cisco Router Architecture
    • 2. Cisco Router (25xx series) and its interfaces
  • III. Routing Technologies
  • IV. LAN Switching Technologies
  • V. WAN Technologies
  • VI. Network Access
  • VII. IP connectivity and Services
  • VIII. Security Fundamentals
  • IX. Automation and Programmability
  • X. Appendix
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