4.1.1 So that every company follows the same rules and guidelines. Otherwise, there might be different companies that wire the same thing a different way.
4.1.2 Because the signal only needs to be strong enough to be detected on the receiving end. Anything more could lead to difficulties.
4.1.3 Machinery, PA systems, phone lines. Optimize performance, minimize interference.
Category | Maximum Speed | Application |
1 | 1 Mbps | Telephone Cabling (POTS) |
2 | 4 Mbps | Token Ring |
3 | 16 Mbps | 10BaseT Ethernet |
4 | 20 Mbps | Token Ring |
5 | 100 Mbps | 100BaseT Ethernet |
5e | 1 Gbps | Gigabit Ethernet |
6 | 1 Gbps | Gigabit Ethernet |
6a | 10 Gbps | Gigabit Ethernet |
Pin | Side A | Side B |
1 | Orange-white | Green-white |
2 | Orange | Green |
3 | Green-white | Orange-white |
4 | Blue | Blue |
5 | Blue-white | Blue-white |
6 | ...view middle of the document...
Or use STP instead.
4.1.10 Multimeter – Used to measure voltage, current, and resistance.
Craftsmen Digital Multimeter $20.69
Tone Generator – Sends out electrically-generated audio pulses. Can be used to test audio equipment or phone systems.
Monoprice 108134 Tone Generator. $39.98
Pair Scanner – Used for reducing LAN downtime.
Network Cat5 LAN Cross Pair Cable Scanner Generator. $28.50
Time domain reflectometer (TDR) – Used to determine the characteristics of electrical lines.
Klein Tools VDV501 815 VDV Ranger TDR Kit. $267.00
4.2.1 The fibers are usually in duplex. So one fiber is required for transmitting, and one for receiving.
4.2.2 Higher bandwidth, it carries light instead of electricity, and immunity to electrical interference.
4.2.3 Multiple photons of light create signal distortion, if used over a long distance.
4.4.1 The device type, the manufacturer, and the devices location. Use this device and do not use this device.
4.4.2 MTU, NetworkAddress, and TsoEnable. The provider, date, version, and signer. Click “Update Driver”, and a wizard launches.
4.4.3 Noise – signal interference. (UTP, coaxial)
Crosstalk – Electromagnetic interference received by one or more wires. (UTP, coaxial)
Interference – any undesired signal that hinders the reception of radio waves. (UTP, coaxial)
Open (open circuit) – when the switch of a circuit is open, preventing the electricity from circulating. (UTP, coaxial)
Short (short circuit) – when a connection between two nodes forces them to be at the same voltage. (UTP, coaxial)
Break – an interruption to the flow of current. (UTP, coaxial, SMF, MMF)
4.4.4 First, check the network connections. After that, check the Ethernet connection to the computer. Then check the connection to the wall. If it still doesn’t work, check the cable for any damage.
4.4.5 Bottom Up – starting at the physical layer, and working your way up the model.
Top Down – starting at the application layer, and working your way down the model.