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2. Power over Ethernet - Wikipedia

   en.wikipedia.org/wiki/Power_over_Ethernet

   Power is supplied as a common-mode signal over two or more of the differential pairs of wires found in the Ethernet cables and comes from a power supply within a PoE-providing networking device, such as an Ethernet switch, or by a PoE injector, a PoE power source that can be used in combination with a non-PoE switch.

3. Packet injection - Wikipedia

   en.wikipedia.org/wiki/Packet_injection

   Packet injection (also known as forging packets or spoofing packets) in computer networking, is the process of interfering with an established network connection by means of constructing packets to appear as if they are part of the normal communication stream.

4. Ethernet over coax - Wikipedia

   en.wikipedia.org/wiki/Ethernet_over_coax

   The first Ethernet standard, known as 10BASE5 (ThickNet) in the family of IEEE 802.3, specified baseband operation over 50 ohm coaxial cable, which remained the principal medium into the 1980s, when 10BASE2 (ThinNet) coax replaced it in deployments in the 1980s; both being replaced in the 1990s when thinner, cheaper twisted pair cabling came to dominate the market.

5. Phantom power - Wikipedia

   en.wikipedia.org/wiki/Phantom_Power

   It is suitable only for powering microphones specifically designed for use with this type of power supply. Damage may result if these microphones are connected to true (48 V) phantom power through a 3.5 mm to XLR adapter that connects the XLR shield to the 3.5 mm sleeve. [17] Plug-in-power is covered by Japanese standard CP-1203A:2007. [18]

6. List of abbreviations in oil and gas exploration and production

   en.wikipedia.org/wiki/List_of_abbreviations_in...

   I:P – injector to producer ratio; IADC – International Association of Drilling Contractors; IAT – internal active turret; IBC – intermediate bulk container; IC – instrument cable; ICoTA – Intervention and Coiled Tubing Association; ICC – isolation confirmation (or control) certificate; ICD – inflow control device

7. Punch down tool - Wikipedia

   en.wikipedia.org/wiki/Punch_down_tool

   A punch down tool with interchangeable blades. A punch down tool, punchdown tool, IDC tool, or a Krone tool (named after the Krone LSA-PLUS connector), is a small hand tool used by telecommunication and network technicians.