CompTIA CompTIA Mobility+ N10-005 Questions & Answers

• Question 451:

  Which of the following wireless standards provide speeds up to 150Mbps?

  A. 802.11a

  B. 802.11b

  C. 802.11g

  D. 802.11n

  Correct Answer: D

  802.11n builds upon previous 802.11 standards by adding multiple-input multiple- output (MIMO). The additional transmitter and receiver antennas allow for increased data throughput through spatial multiplexing and increased range by exploiting the spatial diversity through coding schemes like Alamouti coding. The speed is 150 Mbit/s (even 250 Mbit/s in PHY level)

• Question 452:

  A CAT5e network cable run needs to be installed over fluorescent lighting arrays in an office building. Which of the following cable types would be BEST suited for such an installation?

  A. UTP

  B. Plenum

  C. Coaxial

  D. STP

  Correct Answer: D

  Shielded twisted pair is a special kind of copper telephone wiring used in some business installations. An outer covering or shield is added to the ordinary twisted pair telephone wires; the shield functions as a ground.

  Twisted pair is the ordinary copper wire that connects home and many business computers to the telephone company. To reduce crosstalk or electromagnetic induction between pairs of wires, two insulated copper wires are twisted around each other. Each signal on twisted pair requires both wires

• Question 453:

  In contrast to earlier Wi-Fi speeds, which of the following BEST describes the antenna and channelization properties used in 802.11n?

  A. MIMO, DSSS

  B. MIMO, OFDM

  C. CSMA, DSSS

  D. CSMA, CDMA

  Correct Answer: B

  802.11n builds upon previous 802.11 standards by adding multiple-input multiple- output (MIMO). The additional transmitter and receiver antennas allow for increased data throughput through spatial multiplexing and increased range by exploiting the spatial diversity through coding schemes like Alamouti coding. The speed is 150 Mbit/s (even 250 Mbit/s in PHY level)

• Question 454:

  Management wants to be sure that the existing wiring infrastructure conforms to CAT5e standards. Which of the following is the correct tool?

  A. Cable certifier

  B. Cable tester

  C. OTDR

  D. Protocol analyzer

  Correct Answer: A

  A cable certifier is used to verify that a cable meets its specifications such as the bandwidth and frequency. For example, it can verify a CAT 5e cable meets specifications and supports speeds of 1000Mbps.

• Question 455:

  A user does not have network connectivity. While testing the cable the technician receives the below reading on the cable tester:

  1-----------1 2-----------2 3-----------3 4-----------4 5-----------5 6-----------6 7-----------7 8-----------8

  Which of the following should the technician do NEXT?

  A. Cable is a crossover, continue troubleshooting

  B. Pin 3 is not used for data, continue troubleshooting

  C. Pin 3 is not used for data, replace the NIC

  D. Redo the cable's connectors

  Correct Answer: D

• Question 456:

  Users notice a problem with their network connectivity when additional lights are turned on. Which of the following would be the cause for this problem?

  A. DDOS

  B. Cross talk

  C. Open short

  D. EMI

  Correct Answer: D

  External Machine Interface (EMI), an extension to Universal Computer Protocol (UCP), is a protocol primarily used to connect to short message service centres (SMSCs) for mobile telephones.

• Question 457:

  Which of the following components of wiring distribution is referred to as the core communications closet for an organization?

  A. MDF

  B. Smart jack

  C. IDF

  D. Demarc extension

  Correct Answer: A

  MDF stands for Main Distribution Frame and is the main computer room for servers, hubs, routers, DSL's, etc. to reside.

• Question 458:

  A technician tests a cable going to the patch panel and notices the following output from the cable tester:

  1------------------1 2------------------2 3------------------3 4------------------4 5------------------5 6------------------6 7------------------7 8------------------8

  On a T568A standard CAT5e cable, which of the following wire strands is the cause of this connectivity issue?

  A. White Orange

  B. Solid Brown

  C. Solid Orange

  D. White Green

  Correct Answer: D

  T568A Wiring

  Pi Pai Wir Color n r e

  

  1 3 1 white/green

  

  2 3 2

  green

  

  white/orang 3 2 1 e

  

  4 1 2

  blue

  

  5 1 1 white/blue

  

  6 2 2 orange

  

  white/brow 7 4 1 n

  

  8 4 2 brown

• Question 459:

  Which of the following copper cable types should be chosen to run gigabit speeds through a dropped ceiling that returns airflow?

  A. Non-Plenum CAT5

  B. Non-Plenum CAT5e

  C. Plenum CAT5

  D. Plenum CAT5e

  Correct Answer: D

  Cat 5e is a twisted pair cable for carrying signals. This type of cable is used in structured cabling for computer networks such as Ethernet. The cable standard provides performance of up to 100 MHz and is suitable for 10BASE-T, 100BASETX (Fast Ethernet), and 1000BASE-T (Gigabit Ethernet).

• Question 460:

  Which of the following is an example of a CSMA/CD medium?

  A. WEP

  B. SONET

  C. Token ring

  D. Ethernet

  Correct Answer: D

  CSMA/CD is a Media Access Control method in which a carrier sensing scheme is used and also a transmitting data station that detects another signal while transmitting a frame, stops transmitting that frame, transmits a jam signal, and then waits for a random time interval before trying to resend the frame