ability to offer a number of priorities for various types of communications including voice, e-mail, and video on LANs and WANs. radio A wireless device with an antenna that converts signals to and from formats compatible with the airwaves. Wireless handsets are radios. ransomware A type of security attack where hackers encrypt organizations' files, and then demand payment to decrypt the files to make them readable again. RBOC (Regional Bell Operating Company) At Divestiture in 1984, the Justice Department organized the 22 Bell telephone companies into seven Regional Bell Operating Companies. As a result of mergers and name changes, the former RBOCs are now part of AT&T, CenturyLink, or Verizon. reverse channel In cable TV systems, this carries signals from the customer to the cable operator's equipment. Reverse channels are required for Internet access, on-demand TV, and VoIP. RFID (Radio Frequency Identification) A non-line-of-sight wireless technology used to control, detect, and track objects. Two common applications are merchandise tracking and automated tollbooth collection. roaming www.TechnicalPDF.com The capability in mobile networks to use the same handset on another carrier's network. Carriers set up roaming agreements to define terms such as per-minute fees that carriers charge one another. router A device with routing intelligence that connects local and remote networks together. Routers are also used to forward packets in the Internet. RPKI (Resource Public-Key Infrastructure) An Internet security protocol for routing packets on the Internet. It adds encryption between databases called Internet registries (centralized databases with Internet addresses) and network operators. Encryption is the use of mathematical algorithms to scramble data. RSS (Really Simple Syndication) A series of software standards that automates feeding updates from news sites such as Forbes.com and blogs to other sites and users. The use of RSS means that people don't have to continually check to see news headlines or updates 