71. The area of coverage of a satellite radio beam is known as
72. Which of the following data transmission media has the largest terrestrial range without the use of repeaters or other devices?
73. What is the minimum number of wires needed to send data over a serial communication link layer?
74. The _____ layer is the layer closest to the transmission medium.
75. What is the name of the device that connects two computers by means of a telephone line?
76. What is the main difference between DDCMP and SDLG?
77. On a class B network, how many subnets are available with a subnet mask of 248?
78. Ethernet networks can be cabled in a number of topologies, depending on what works best in each environment. As more nodes are added, the efficiency of Ethernet decreases. Select the best answer as to why Ethernet becomes less efficient as size increases.
79. In a _____ topology, if there are n devices in a network, each device has n - 1 ports for cables.
80. Typewriter terminals can print computer-generated data at a rate of
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