on of, 80 environmental controls in, 82-84 security, 81 Data Over Cable System Interface Specifications. See DOCSIS standards data plane signals, 261 databases, LTE (Long-Term Evolution), 343-344 DCS (Digital Cellular System), 382 dedicated wavelengths, 251 cloud connections, 257-258 inter-exchange mileage, 254 local channels, 254 MANs (Metropolitan Area Networks), 253-254 network topology on, 252-253 T1 services, 251-252, 267 www.TechnicalPDF.com T3 services, 251-252, 267 WANs (Wide Area Networks), 253-254 Deep Packet Inspection (DPI), 25, 26-29, 92 Denial of Service (DoS) attacks, 52, 119 dense wavelength division multiplexers (DWDMs), 7-8, desktop video conferencing, 107-109 desktop virtualization, 90-91 DevOps, 56 DID (Direct Inward Dialing), 106 digital assistant software, 117-118 Digital Cellular System (DCS), 382 digital divide, 315-316 Digital Signal Processors (DSPs), 92, 104-105 digital signaling, 63, 92, 104-105, 267 Digital Subscriber Line. See DSL (Digital Subscriber Line) technology Direct Inward Dialing (DID), 106 DirecTV, 129-130, 133, 216 Dish Network, 145, 216, 327-328 disk mirroring, 87 dispersed contact centers, 112 Distributed Antenna Systems (DAS), 354 distributed Denial of Service (DoS) attacks, 52 distribution hubs, 196 DNC (do-not-call) list, 145 DNO (Do Not Originate) Registry, 145-146 DNS (Domain Name System), 295 Docker, 47 DOCSIS standards, 213-215, 225 Domain Name System (DNS), 295 domain names, 295-296 do-not-call (DNC) list, 145 DoS (Denial of Service) attacks, 52, 119 DoubleClick, 158, 277 www.TechnicalPDF.com Dow Chemical Company, 83 DPI (Deep Packet Inspection), 25, 26-29, 92 drones, 364, 365-366 drop wires, 153 DSL (Digital Subscriber Line) technology backups, 263 bonding, 248 DSLAMs (DSL Access Multiplexers), 201-202 history of, 247 how it works, 247 limitations of, 247-248 replacing with fiber and wireless, 249 standards for, 267-268 DSLAMs (DSL Access Multiplexers), 201-202 DSPs (Digital Signal Processors), 92, 104-105 Dunbrack, Linda, 310 DWDMs (dense wavelength division mu