SG Network Media
Chapter 4
TRUE/FALSE
1. There are two basic categories of physical cabling used in Ethernet networks. They are copper wire and fiber optic.
2. The length of cable between the wall jack and a patch panel is called vertical cabling.
3. Wireless and wired networks are both susceptible to RFI.
4. Because fiber-optic cabling uses light pulses instead of electrical signals, it is immune to interference and highly resistant to eavesdropping.
5. Wireless networks are often used to extend the reach of a wired LAN.
MULTIPLE CHOICE
1. Which of the following is not one of the main differences between the types of network cabling?
| a. | the distance that a signal can travel |
| b. | the ability to send and receive signals |
| c. | the type of signal that the media can transmit |
| d. | the speed at which the signal can be sent |
2. Which of the following is not a form of electromagnetic interference, or EMI?
| a. | rain/fog |
| b. | transformer |
| c. | fluorescent lights |
| d. | crosstalk |
3. When a signal travels across network medium, it signal loses strength the further it gets from the transmitting station, to the point where the receiving station can no longer interpret the signals correctly. What is the term for this phenomenon?
| a. | electromagnetic interference |
| b. | crosstalk |
| c. | attenuation |
4. What are all of the connections in a network considered, including the cables and their connectors?
| a. | telecommunications closet | ||
b. | horizontal wiring | ||
| c. | work area | ||
| d. | cable plant |
5. What is the maximum bandwidth for a network cabled using category 5e UTP cable?
| a. | 10 Mbps |
| b. | 16 Mbps |
| c. | 100 Mbps |
| d. | 1000 Mbps |
6. What is the maximum cable length for both category 5e and category 6 UTP cable?
| a. | 10 m |
| b. | 20 m |
| c. | 100 m |
| d. | 1000 m |
7. The frequency at which a wireless network operates is measured in cycles per second and is expressed as what unit of measurement?
| a. | hertz |
| b. | volts |
| c. | watts |
| d. | joules |
8. Terrestrial and satellite systems are two types of which wireless networking technology?
| a. | infrared |
| b. | laser |
| c. | narrowband |
| d. | microwave |
9. What is the way in which bit signals are represented on the network medium?
| a. | encapsulating |
| b. | encoding |
| c. | decoding |
| d. | terminating |
10. Which of the following is a length of cable that connects a computer to either a networking device or to an RJ-45 jack?
| a. | patch panel |
| b. | cable segment |
| c. | backbone cable |
| d. | patch cable |
11. What is the term used that defines network cabling in the work area and between telecommunications closets and equipment rooms?
| a. | backbone cabling |
| b. | structured cabling |
| c. | horizontal wiring |
| d. | vertical wiring |
12. The entrance facility is the place where the connection to a WAN is located. It is basically the point where the LAN begins and ends. What is another name for this point?
| a. | departure point |
| b. | entrance point |
| c. | demarcation point |
| d. | customer premises point |
13. A signal has just been received from the WAN link on your network. Using the given components, which of the following shows the path that the signal would take from the WAN to a workstation on your network? Assume all components are used at least once and that some components may be used more than once.
1—backbone cabling
2—entrance facility
3—equipment room
4—horizontal wiring
5—telecommunications closet
6—work area
| a. | 2, 1, 3, 4, 5, 4, 6 |
| b. | 2, 1, 3, 1, 5, 4, 6 |
| c. | 6, 1, 3, 4, 5, 4, 6 |
| d. | 2, 1, 5, 1, 3, 4, 6 |
14. Which of the following connections might require a crossover cable?
| a. | router to switch |
| b. | switch to computer |
| c. | switch to switch |
| d. | hub to computer |
15. In an MDI device, on which two pins does the device use to transmit?
| a. | 1 and 2 |
| b. | 3 and 4 |
| c. | 4 and 6 |
| d. | 3 and 6 |
16. What type of wiring should be used for a high-speed connection between two buildings?
| a. | coaxial cabling |
| b. | UTP cabling |
| c. | STP cabling |
| d. | fiber-optic cabling |
17. What is a disadvantage of using fiber-optic cabling?
| a. | limited to shorter distances due to high attenuation |
| b. | low bandwidth potential |
| c. | high susceptibility to eavesdropping |
| d. | difficult to install |
18. What type of wireless technology is used for 802.11b /g /n networks?
| a. | spread-spectrum radio |
| b. | laser |
| c. | infrared |
| d. | narrowband radio |
MULTIPLE RESPONSE
1. Which of the following categories of UTP cabling are considered to be data grade as specified by ANSI/TIA/EIA? (Choose all that apply.)
| a. | Category 2 |
| b. | Category 3 |
| c. | Category 4 |
| d. | Category 5 |
| e. | Category 6 |
2. Which of the following are components of a network that are defined by structured cabling?
| a. | horizontal wiring |
| b. | switch panel |
| c. | entrance facility |
| d. | work area |
| e. | punchdown closet |
COMPLETION
1. A network that uses the air to transmit signals across the network is considered a(an) ____________ network.
2. When copper wires are bundled together, they are susceptible to ____________, a form of interference where the signals leak out onto other wires.
3. A type of wireless network that uses light beams to send signals between two devices and is highly susceptible to visible light sources is called ____________.
4. A wireless ____________ using line-of-sight or broadcast transmissions can extend a wired network over a short distance that would normally require a dedicated communication line from a communications carrier.
5. Most office buildings usually have a false ceiling with an area above that which is used to run conduit for heating and air conditioning units, called the ____________.
MATCHING
| a. | cable plant |
| b. | horizontal wiring |
| c. | entrance facilities |
| d. | patch cable |
| e. | backbone cabling |
| f. | attenuation |
| g. | radio frequency interference |
| h. | electromagnetic interference |
| i. | straight-through cable |
| j. | crossover cable |
1. used to connect two devices of the same type
2. caused by motors, transformers, and fluorescent lights
3. connects a corporate network to third-party telecommunications provider
4. interconnects telecommunications closets and equipment rooms
5. both ends use the same wiring standard
6. caused by strong broadcast sources
7. connects a patch panel port to a switch or hub
8. runs from work area’s jack to telecommunications closet
9. all the cables and connectors that tie a network together
10. weakening of the signal as it travels
SHORT ANSWER
1. Describe twisted-pair cabling.
2. What are the advantages to using UTP in a network installation?
3. What is the difference between a straight-through cable and a crossover cable?
4. When would you use a straight-through cable and when would you use a crossover?
5. What are the benefits of fiber-optic cabling?
6. What five issues should you consider when determining the structure for a new network?
7. Why is copper cabling susceptible to eavesdropping?
8. What are the benefits of installing a wireless network?
9. What is a transceiver and what is its function?
10. What is structured cabling and what are its six components?
No comments:
Post a Comment