CompTIA CompTIA Mobility+ N10-005 Questions & Answers

• Question 431:

  Which of the following wireless technologies only uses the 5GHz spectrum but reaches a theoretical throughput of only 54Mbps?

  A. A

  B. B

  C. G

  D. N

  Correct Answer: A

  802.11a standard uses the same core protocol as the original standard, operates in 5 GHz band, and uses a 52-subcarrier orthogonal frequency-division multiplexing (OFDM) with a maximum raw data rate of 54 Mbit/s, which yields realistic net achievable throughput in the mid-20 Mbit/s. The data rate is reduced to 48, 36, 24, 18, 12, 9 then 6 Mbit/s if required.

• Question 432:

  Users are reporting wired connectivity drops in a new office with brand new CAT6 infrastructure. Which of the following tools should a technician use to BEST troubleshoot this issue?

  A. OTDR

  B. Protocol analyzer

  C. Toner probe

  D. Cable certifier

  Correct Answer: D

  A cable certifier is an electronic device used to verify the source of electric current, voltage and a switching matrix used to connect the current source and the volt meter to all of the contact points in a cable.

• Question 433:

  Which of the following fiber types is MOST often used indoors?

  A. Plenum

  B. Modal conditioning

  C. Multimode

  D. Singlemode

  Correct Answer: C

  Multi-mode optical fiber is a type of optical fiber mostly used for communication over short distances, such as within a building or on a campus.

  Typical multimode links have data rates of 10 Mbit/s to 10 Gbit/s over link lengths of up to 600 meters (2000 feet) and 10 Gbit/s for 300m (1000 feet) -- more than sufficient for the majority of premises applications.

• Question 434:

  Which of the following 802.11 standards transmits the signals the GREATEST distance?

  A. a

  B. b

  C. g

  D. n

  Correct Answer: D

  802.11n uses multiple antennas to increase data rates.

• Question 435:

  Which of the following could be installed to allow a home user with one desktop computer to economically have Internet access in every room in the house?

  A. Fiber optic

  B. CAT6

  C. Broadband over powerline

  D. CAT5

  Correct Answer: C

  Internet access service through existing power lines is often marketed as broadband over power lines (BPL), also known as power-line Internet or powerband. A computer (or any other device) would need only to plug a BPL modem into any outlet in an equipped building to have high-speed Internet access

• Question 436:

  A technician notices a newly installed CAT5 cable is longer than the standard maximum length. Which of the following problems would this MOST likely cause?

  A. Split cable

  B. EMI

  C. DB loss

  D. Crosstalk

  Correct Answer: C

  The maximum length for a cable segment is 100 m per TIA/EIA 568-5-A. If longer runs are required, the use of active hardware such as a repeater or switch is necessary. The specifications for 10BASE-T networking specify a 100metre length between active devices. This allows for 90metres of solid-core permanent wiring, two connectors and two stranded patch cables of 5metres, one at each end.

• Question 437:

  Which of the following connector types would be found with a VoIP system utilizing CAT6 cabling?

  A. SC

  B. RJ-45

  C. RJ-11

  D. BNC

  Correct Answer: B

  The heavier wire in some Cat 6 cables makes them too thick to attach to standard 8P8C (RJ-45) connectors without a special modular piece

• Question 438:

  Which of the following is the MAXIMUM rated speed for CAT5 cabling?

  A. 10Mbps

  B. 100Mbps

  C. 1000Mbps

  D. 10Gbps

  Correct Answer: B

  Category 5 cable (Cat 5) 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, 100BASE-TX (Fast Ethernet), and 1000BASE-T (Gigabit Ethernet)

• Question 439:

  Which of the following reduces the deployment cost of a wireless LAN?

  A. WPA

  B. 802.1x

  C. MIMO

  D. PoE

  Correct Answer: D

  Power over Ethernet or PoE describes any of several standardized or ad-hoc systems which pass electrical power along with data on Ethernet cabling. This allows a single cable to provide both data connection and electrical power to devices such as wireless access points or IP cameras.

• Question 440:

  Which of the following technologies can cause interference for 802.11g?

  A. RADAR

  B. 802.11a

  C. IrDA

  D. Bluetooth

  Correct Answer: D

  This wireless communication standard has a maximum transmission speed of 54 Mbits per second and a typical indoor range of 30 meters. It uses the 2.4 GHz band. This band may have to deal with interference from cordless telephones, Bluetooth devices, and various appliances.