Network Cables and Cabling
Introduction to Network Cables
Important properties of network cables include their compatibility with industry standards, capacity, and reliability. Cables are still used instead of wireless connections on many networks today.
A patch cable connects two network devices. Network patch cables are typically CAT5 or CAT5e Ethernet cables linking a computer to a nearby hub, switch or router.
Ethernet Crossover Cables
A crossover cable directly connects two network devices of the same type to each other over Ethernet. Crossover cables are useful for temporary networking of devices when a network router, switch or hub is not present.
Null Modem Cables
A null modem cable connects two standard serial ports for the purpose of computer-to-computer networking. Null modem cables enable data transfer between two computers with a minimum of setup required.
RJ-45 Connectors and Cables
RJ45 is a standard type of connector for network cables such as those used in Ethernet networks. RJ45 connectors feature eight pins to which cables interface electrically.
Fiber Optic Cable
Fiber optic cables carry information using pulses of light. These cables are designed for long distance network communications, although fiber to the home installations are becoming more common.
What Are T1 Lines and T3 Lines?
T1 and T3 lines are reserved circuits typically used by organizations to connect two geographically separated offices for private voice and/or data telecommunication service.
Network Cable and Connection Technologies Practice Exam
This interactive test presents questions and answers on common cabling technologies for home networks.
A leased line is a cable connecting two specific locations for voice and/or data network service. Leased lines most commonly are rented by businesses to connect branch offices.
These pinout diagrams illustrate the 9-pin and 25-pin serial line RS-232 standard network cables.
AWG - American Wire Gage
This reference table for the AWG specification lists wire diameters in millimeters and inches for wire gages 10 through 36.
Wire Gage Calculator
Convert between gage numbers and wire sizes in inches. Uses AWG or any of the other major wire gage standards.
Cable Testing Help
Many products and techniques exist for testing network cables to ensure they meet specifications for speed and quality. Learn about the engineering principles behind network cable testing explained clearly with diagrams.
66 Blocks - Punch Down Blocks
The "66 punch down block" still serves a purpose on a few types of networks, but they have become something of a historical curiousity now.