You can use a power over ethernet poe injector to add

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You can use a Power over Ethernet (PoE) injector to add PoE capability to regular non-PoE network links. PoE injectors can be used to upgrade existing LAN installations to PoE, and provide a solution where fewer PoE ports are required. To upgrade a network connection to PoE, patch it through the PoE injector. Power injection is controlled and automatic Ethernet standards are defined by the IEEE 802.3 committee. The following table compares the characteristics of the various Ethernet standards: Category Standard Bandwidth Cable Type Maximum Segment Length Ethernet 10BaseT 10 Mbps (half- duplex) 20 Mbps (full- duplex) Twisted pair (Cat3, 4, or 5) 100 meters 10BaseFL 10 Mbps (multimode cable) Fiber optic 1,000 to 2,000 meters Fast Ethernet 100BaseTX 100 Mbps (half- duplex) 200 Mbps (full- duplex) Twisted pair (Cat5 or higher) Uses 2 pairs of wires 100 meters 100BaseFX 100 Mbps (multimode cable) Fiber optic 412 meters Gigabit Ethernet 1000BaseT 1,000 Mbps (half- duplex) Twisted pair (Cat5 or higher) 100 meters
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2,000 Mbps (full- duplex) 1000BaseCX (short copper) Special copper (150 ohm) 25 meters, used within wiring closets 1000BaseSX (short) Fiber optic 220 to 550 meters depending on cable quality 1000BaseLX (long) 550 meters (multimode) 10 kilometers (single- mode) 10 Gigabit Ethernet 10GBaseT 10 Gbps (full- duplex only) Twisted pair (Cat6, or 7) 100 meters 10GBaseSR/10GBaseSW Multimode fiber optic 300 meters 10GBaseLR/10GBaseLW Single-mode fiber optic 10 kilometers 10GBaseER/10GBaseEW Single-mode fiber optic 40 kilometers You should also know the following facts about Ethernet: The maximum cable length for UTP Ethernet "T" implementations is 100 meters for all standards. Ethernet standards support a maximum of 1024 hosts on a single subnet. Device Addressing 0:00-1:08 In order for a computer to send or receive information on a network, it needs an address. In fact, any device that is connected to a network needs an address. Without them, computers and connectivity devices wouldn't know where to send data packets. You can think of a network address in much of the same way as a mailing address. When you get a package delivered to you, the postal carrier needs to know a few things about where the package needs to go. They need to know the state, the city, the street number, and the house number. All of these numbers together comprise your address. Well, network addresses work much in the same way. They are composed of different parts, and each part lets other devices know where information needs to go. Also similar to mailing addresses is the fact that network addresses need to be unique. No two devices that are on the same network can have the same network address. Imagine what would happen if four houses in the same neighborhood had the same mailing address. Postal carriers would have to guess as to which house the package is meant for. The same is true with networks.Without unique addresses, communication would be very confusing.
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