Network Media - Copper Core Cable

1. ______ signals are sent through copper core cable as pulsating electrical energy.
ans: Electronic

2. Pulsating light waves are commonly sent through _____cable.
ans : fiber optic

3. Wireless technology commonly transmits ____ waves, ______waves,and_____ through the atmosphere.
ans : pulsating waves , pulsating radio waves , infrared light waves

4. What are the two types of electrical signals?
ans : analog signal and digital signal

5. Time affects the degree of the slope in a ____ siganl.
ans : analog

6. Time affects the duration of the voltage level in a _____ signal.
ans : digital

7. How often an analog or digital cycle repeats in one second is called ____.
ans : frequency

8. Frequency is measured in _____ and is represented by the abbreviation _____.
ans : Hertz

9. How many times does an analog cycle repeat in a2.3-kHz electronic signal
ans : 2.3MHz=2300Hz  2300Hz/5= 460 cycles

10. How many times does a digital cycle repeat in a 10-MHz electronic signal ?
ans : 10MHz = 10000Hz   10000Hz/5=2000cycles

11. What is attenuation ?
ans : The loss of signal strength.

12. Noise and crosstalk are types of _____.
ans : interference

13. What is AXT?
ans : Alien crosstalk (AXT) is electromagnetic noise that can occur in a cable that runs alongside one or more other signal-carrying cables.

14. What is latency?
ans : The amount of time it takes a signal to travel from its source to its destitnation.

15. A method of transmitting data in the form of a digital signal, using the entire banwidth of a cable is called_____.
ans : Baseband

16. A method of transmitting data in the form of several  analog signals at the same time is called_____.
ans : broadband

17. List the three modes in which communication can occur.
ans : simplex , full-duplex , half duplex communication

18. What is the difference between half-duplex and full-duplex communication
ans : A half-duplex system provides for communication in both directions, but only one direction at a time (not simultaneously). Typically, once a party begins receiving a signal, it must wait for the transmitter to stop transmitting, before replying.
         A full-duplex system allows communication in both directions, and unlike half-duplex, allows this to happen simultaneously. Land-line telephone networks are full-duplex since they allow both callers to speak and be heard at the same time. A good analogy for a full-duplex system would be a two lane road with one lane for each direction.

19._____ is opposition to current flow in a DC circuit , and _____ is the opposition to current flow in a AC circuit?
ans :

20. The size of a conductor's diameter is described by what rating?
ans :

21. Which conductor is larger , one that has a 22 AWG rating or one that has a 24 AWG rating
ans : 22 AWG rating

22. RG-58 is also refrred to as ______.
ans :Thinnet

23. What type of coaxial cable is recommended bythe EIA/TIA570 residential communication standard ?
ans : cable system for commercial buildings that support data networks, voice, and video.

24. Which types of coaxial cableare reffered to as thicknet ?
ans : thicker cable

25. What is maximum Frequency and data rate associated with Categoty 6a cable?
ans : 250MHz and a data rate of 1 Gbps


26. What Category cable physical attributes provide improved data rates and higher frequencies when compared with Category 5 cable?
ans : 


27. What is the difference between Category 6 and Category 6a ?
ans : Cat 6 cables makes them too thick to attach to 8P8C connectors without a special modular piece, resulting in a technically out-of-compliance assembly. Category 6a performs at improved specifications, in particular in the area of alien crosstalk as compared to Cat 6 UTP, which exhibited high alien noise in high frequencies.


28. List the following characteristics of a 10BaseT network :topology, cable type , connector type, maximum segment length, minimum cable length, and data rate.
ans : 


29. What will happen to an electronic signal in a 10Base T network if it passes through more than four hubs?
ans : 


30. what does the acroym Auto-MDIX represent?
ans : 


31. What is Auto-MDIX?
ans:


32. What does the acroym used to identify th RJ-45 connector?
ans : Registered Jack -45


33.What is the purpose of a rollover cable?
ans : Rollover cable is a type of null-modem cable that is often used to connect a computer terminal to a router's console port.


34. What does the acronym PoE represent ?
ans : Power over Ethernet


35. What type of Devices uses PoE?
ans : speakers , phones PDA chargers


36. What is the maximum voltage delivered by PoE
ans : 48volts


37. What is the term used for a circuit path that is shorter than its intended path?
ans : 


38. What is the term used for an incomplete circuit path ?
ans: 


39. What is the term used to describe a wire that comes in contact with a metal enclosure that is touching the earth?
ans : 


40. Name three possible cable problems that might result from improperly wiring twisted cable pairs.
ans : short , open , ground