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Coaxial cable C. What is the basis for a two-factor authentication mechanism? Something you know and a password b. One downside, however, is the cost: typically it is more expensive than cable and DSL, although not quite as expensive as fiber connections. DSL uses telephone lines to transmit Internet data, and speeds are generally the same as cable Internet and satellite connections.
The data signal uses an unused portions of the telephone line to provide Internet access, allowing both a data and voice connection to share the same telephone line simultaneously. The availability of DSL is highly dependent on your distance from the telephone company's facility and phone line conditions.
Noisy phone lines are very disruptive to DSL signals. Mobile professionals will find wireless Internet sufficient for their needs.
Wireless broadband can come in the form of data connections through the cellular network, or through Wi-Fi routers that allow several users to share a single Internet connection of any of the above technologies. Connection speeds can be comparable to slower cable and DSL connections, but can be far slower depending on the amount of customers sharing the connection, the technology used by the transmitting facility, and distance from the transmitter.
D Data link layer. A Packets. B Frames. C Bytes. D All of the above. A Port. B Physical. A message format, syntax and semantics. B rules for when and how processes send and respond to messages.
C types of messages exchanged. A Star. B Bus.
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