Correct Answer: the clocking is derived from the data in synchronous transmission
5. A 4 KHz noise less channel with one sample ever 125 per sec is used to transmit digital signals. If Delta modulation is selected, then how many bits per second are actually sent?
6. Alice is setting up a small network in her home so that she can study for her MCSE exams. She doesn't have a lot of money to spend on hardware, so she wants to use a network topology that requires the least amount of hardware possible. Which topology should she select?
Correct Answer: is less expensive than flat-rate service only when the number of calls is large and the duration of each is short
8. The MAC (Media Access Control) address of the network card is used in both Ethernet and Token-Ring networks and is essential for communication. What does MAC provide?
Options
A. A logical address that identifies the workstation
B. A physical address that is randomly assigned each time the computer is started
C. A physical address that is assigned by the manufacturer