Data Communications & Networks I

1. Digital +5 volt and 0 or -5 volt pulses are represented as ____ digits 0 and 1.
3. The fundamental analog signal is called a ___________.
5. Ethernet LANs use___________ for signaling.
6. The input and output connections on a multiplexer are called:
11. T-1 systems use ___________ for signaling.
13. DS stands for:
14. The smallest element of data.
15. A ________ pathway between two nodes or devices.
18. To determine the voltage magnitude of each sample and compare it to a reference voltage.
19. A network topology known for its redundancy and commonly used on internet WAN links is the ______ topology?
20. Is used to "wake" the receiver.
21. ASCII, Extended ASCII and Unicode are examples of:
24. signal When we speak into a standard telephone today our voice is represented by
25. Particular format of electrical pulses.

1. The frequency range required for transmitting.
2. An analog modulation technique that uses two different frequencies at the same amplitude to represent a binary code?
4. A simple waveform used internally in digital electronic equipment and personal computers is:
5. Multiple Data Terminating Equipment sharing physical transmission facility through common Data Communication Equipment is called:
7. What kind of sign transmits light pulses over a glass fiber?
8. The common name used for a circuit carrying multiplexed voice channels that is used the telephone company is:
9. The most common technique for voice digitization is called:______ Modulation
10. When a pulse has the same polarity as the preceding pulse this is called______
12. The gradual loss of a transmission signal as it travels over a distance is called:
16. A transmission mode in which information can only be transmitted in one direction.
17. The most common topology used in LAN implementation is the?
22. The device/process used to convert analog signals into digital signals is called a:
23. A set of specific rules and procedures for the control of communications in a network is called a: