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In network topology, a cable modem is a network bridge that conforms to IEEE 802.1D for Ethernet networking (with some modifications). The cable modem bridges Ethernet frames between a customer LAN and the coax network. Technically, it is a modem because it must modulate data to transmit it over the cable network, and it must demodulate data ...
A cable modem at the customer is connected via coaxial cable to an optical node, and thus into an HFC network. An optical node serves many modems as the modems are connected with coaxial cable to a coaxial cable "trunk" via distribution "taps" on the trunk, which then connects to the node, possibly using amplifiers along the trunk.
The NETGEAR Nighthawk CAX80, a high performing modem/router combo that works with internet plans up to 1200 Mbps, has similar specs as the Comcast/Xfinity-only Motorola MT8733—DOCSIS 3.1, 2.5 ...
Modems which use a mobile telephone system (GPRS, UMTS, HSPA, EVDO, WiMax, 5G etc.), are known as mobile broadband modems (sometimes also called wireless modems). Wireless modems can be embedded inside a laptop, mobile phone or other device, or be connected externally. External wireless modems include connect cards, USB modems, and cellular ...
Provide cable service operators with service protection (i.e. prevent unauthorized modems and users from gaining access to the network's RF MAC services) BPI/SEC is intended to prevent cable users from listening to each other. It does this by encrypting data flows between the CMTS and the cable modem.
Many "modems" (cable modems, DSL gateways or Optical Network Terminals (ONTs)) provide the additional functionality to host a LAN so most Internet access today is through a LAN such as that created by a WiFi router connected to a modem or a combo modem router, [citation needed] often a very small LAN with just one or two devices attached. And ...
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