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Table Of Contents  CertiGuide to Network+
 9  Appendix A: Answers to Success Questions and Real World Exam Questions

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Chapter 0000: Network Basics Answers
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Chapter 0001: LAN Cabling Answers

1. How many categories are defined by the IEEE 802 committee?

A. 16 categories

B. 7 categories

C. 3 categories

D. 2 categories

E. 10 categories

Explanation: The 802 committee currently defines 16 categories, of which 802.3 (Ethernet) and 802.5 (Token Ring) are the most well known.

More categories have been defined as technology has matured. An example of this is the recent addition of wireless, 802.11x(x)

& Domain 1.2: Specify the main features 802.2 (LLC), 802.3 (Ethernet), 802.5 (token Ring) 802.11b (wireless) and FDDI networking technologies including: speeds, access, method, topology, media


 

2. What is an external transceiver typically used for?

A. Convert the physical connection from one Ethernet type to another

B. To bridge to different LANs

C. To regenerate and strengthen the data packets

D. The convert from Ethernet to Token Ring

E. To terminate an Ethernet COAX connection

Explanation: External transceivers are most commonly used to convert a coax or AUI Ethernet connection to an RJ45 type connection.

& Domain 1.4: Recognize the following media connectors and-or describe their uses.


 

3. What type of cable is used on a 100BaseT network?

A. STP

B. Coaxial

C. Fiber Optics

D. UTP

E. V.35

Explanation: 100BaseT, or Fast Ethernet, runs on Unshielded Twisted Pair (UTP) cable, typically in a star topology.

& Domain 1.3: Specify the characteristics with (e.g., speed, plant, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.


 

4. What devices are commonly used to organize the cabling system in a wire closet?

A. External Parallel print servers

B. Plastic twist ties

C. Color coded RJ-45 ends

D. Patch panels

E. Masking Tape

Explanation: Patch panels make the wiring closet neat and orderly by providing a single location for all network plugins.

& Domain 1.4: Recognize the following media connectors and/or describe their uses: RJ-11, RJ-45, AUI, BNC, ST, and SC.


 

5. What is considered to be the maximum acceptable utilization on an Ethernet segment

A. 100%

B. 10%

C. 30%

D. 70%

E. 50%

Explanation: In a collision-type network such as Ethernet, 30% is considered to be the maximum percentage of wire utilization before network performance begins degrade.

& Domain 1.2: Specify the main features of 802.2 (LLC), 802.3 (Ethernet) 802.5 (token ring), 802.11 (wireless) and FDDI networking technologies, including: Speed, Access, Method, Topology, Media.

& Domain 1.3: Specify the characteristics with (e.g., speed, plant, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.


 

6. What purpose do the twists in STP (shielded twisted pair) cable serve?

A. Makes the cable more flexible

B. Provides added strength

C. Minimized electrical interference

D. Allows twist on-connectors

E. Prevents unwanted tangling

Explanation: The twists in STP cable helps reduce internal and external interference.

& Domain 1.3: Specify the characteristics with (e.g., speed, plant, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.

& Domain 4.2: Given a troubleshooting scenario involving a small Office/Home Office network failure (e.g., xDSL, cable, home satellite, wireless, POTS) identify the cause the problem.

& Domain 4.10: In a troubleshooting scenario involving a network with a particular physical topology (i.e., bus, Star/hierarchal, mesh, ring, and wireless) and including network diagram identify the network area affected and the cause the problem.

& Domain 4.12: Given a network-troubleshooting scenario involving a wiring/infrastructure problem, identify the cause of the problem) e.g., bad media, interference, network hardware).


 

7. Patch panels are used for:

A. Terminating network cable ends

B. Aids in organizing the wiring system

C. Minimizing cable lengths

D. Connecting dissimilar cable types

E. Connecting bridges to the network

Explanation: Patch panels are not required for a network installation, but they aid greatly in keeping the cables organized and clean.

& Domain 1.4: Recognize the following media connectors and/or describe their uses: RJ-11, RJ-45, AUI, BNC, ST, and SC.


 

8. Your company has expanded and wishes to integrate with another building that is approximately 1 kilometer away. For some unspecified reason, you cannot use repeaters. What type of cabling will you install?

A. 100BaseT

B. 100BaseFX

C. 10Base5

D. 10Base2

E. 1000BaseT

Explanation: Fiber optic cabling has a maximum span of 1 kilometer without the need of a repeater.

& Domain 1.3: Specify the characteristics with (e.g., speed, length, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.


 

9. Which of the following are characteristics of Category 5 cabling?

A. UTP

B. 100/Mbps

C. 100-meter limit

D. 4 Pairs of wires

E. None of the above is correct.

Explanation: Category 5 cabling has a 100-meter distance limit without a repeater, can transmit 100 Megabits of data per second (100/MBps), and uses four Unshielded Twisted Pairs of wires.

& Domain 1.3: Specify the characteristics with (e.g., speed, length, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.


 

10. 100BaseT requires _________ wires.

A. One

B. Two

C. Three

D. Four

E. Five

Explanation: 100BaseT requires just two pairs of twisted wires (Send/Ground and Receive/Ground).

& Domain 1.3: Specify the characteristics with (e.g., speed, length, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.


 

11. Which 100Mbps standard uses only two pairs of CAT5 UTP cable?

A. 10BaseT

B. 100BaseT4

C. 100BaseTX

D. 100Base2

E. 100BaseFX

Explanation: Know your speeds and feeds (data speeds and length limits) for the various cable types. 10BaseT only uses two twisted pairs because that's all it needs. 100BaseT4 uses all four pairs so that it can attain speeds (100Mbps). 100Base2 does not exist and if it did, it would use thinnet coaxial. 100BaseFX uses fiber instead of twisted pair. 100BaseTX is the only 100Mb version of Ethernet shown that uses only 2 pairs of a CAT5 UTP cable for signaling.

& Domain 1.3: Specify the characteristics with (e.g., speed, length, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.


 

12. A PC in the corner of your building cannot communicate with the network, and all other nodes seem to be slower than normal. There are 103 meters of CAT5 UTP (Unshielded Twisted Pair) cabling between the corner PC and the network hub.

Required results:

  • Establish connectivity between the computer and the network.

  • Increase network performance.

Optional results:

  • Decrease network downtime.

  • Increase server processing.

  • Lower operating costs.

Proposed solution:

  • Replace the current NIC in the non-communicative PC with a 100BaseFX network card.

  • Install a repeater between the non-communicative PC and the hub.

  • Install new NICs in all other PCs.

 

A. The proposed solution meets the required results and all of the optional results.

B. The proposed solution meets the required results and two of the optional results.

C. The proposed solution meets the required results and one of the optional results.

D. The proposed solution does not meet the required results.

E. The proposed solution meets the required results and all of the optional results.

Explanation: The proposed solution would have worked had the proper NIC been installed on the non-communicative PC. A 100BaseFX NIC is for fiber optic networks, not Fast Ethernet, which is what CAT5 uses for 100Mbit connections. Adding a repeater would have been necessary to boost the signal for that "corner" PC, and upgrading all other NICs would have increased overall network performance.

& Domain 1.3: Specify the characteristics with (e.g., speed, plant, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.


 

13. A laptop computer using 802.11b connects to a LAN at some locations, and not other locations. Possible reasons for this include:

A. Improper MAC address

B. Interference from motors or other EMI sources

C. Out of signal range

D. Metal objects obscuring signal

E. Improper password

Explanation: 802.11 is a wireless technology and is subject to the same issues as a radio or TV signal.

& Domain 1.1: Recognize the following logical or physical network topologies given a schematic diagram or description: Star/ hierarchal, bus, mesh, ring, wireless.

& Domain 4.10: In a troubleshooting scenario involving a network with a particular physical topology (i.e., bus, Star/hierarchal, mesh, ring, and wireless) and including network diagram, identify the network area affected and the cause the problem.


 

14. Gigabit Ethernet cable uses ___ twisted pairs.

A. 1

B. 2

C. 3

D. 4

E. 5

Explanation: Ethernet and Fast Ethernet require 2 pairs. Gigabit Ethernet requires 4 pair CAT5 cable.

& Domain 1.3: Specify the characteristics with (e.g., speed, plant, topology, cable type, etc.) of the following: 802.3 (Ethernet) standards, 10 Base-T, 100 Base-TX, 10 Base2, 10Base5, 100 Base-FX, Gigabit Ethernet.


 

15. A Tone Generator is useful to detect:

A. Faulty hub connections

B. Faulty wiring

C. Faulty termination

D. STP category level

Explanation: A tone generator is used to identify breaks, shorts, or other wire problems.

& Domain 4.5: Given a wiring task, select the appropriate tool (e.g., wire cover, Media tester/certify error, and the gentle, tone generator, optical tester, etc.).


 

16. To test a NIC without a cable or hub you would use a _______.

A. Time Domain Reflectometer

B. Loopback address

C. Diagnostics diskette

D. Ping 127.0.0.1

E. None of the available choices are acceptable

Explanation: A TDR is used to test cable, not NICs. Advanced TDRs such as a Fluke LanMeter can be used to test a NIC, but it requires a cable from the tester to the NIC. However, pinging the loopback address is a viable option. The loopback address is some address in the 127.x.y.z/8 network ID. The most common loopback address is 127.0.0.1, but you can use anything between that and 127.255.255.254. Alternatively, a diagnostics diskette from the NIC manufacturer commonly includes diagnostics programs that you can use to test the functionality of the NIC.

& Domain 4.5: Given a wiring task, select the appropriate tool (e.g., wire crimper, Media tester/certifier, punch down tool, tone generator, optical tester, etc.).

& Domain 4.6: Given a network scenario interpret visual indicators (e.g., link lights, collision lights, etc.) to determine the nature of the problem.


Previous Topic/Section
Chapter 0000: Network Basics Answers
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Pages in Current Topic/Section
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Chapter 0010: OSI and IEEE Network Standards Answers
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