CompTIA CompTIA A+ 220-801 Questions & Answers

• Question 761:

  255.255.0.0 is the standard subnet mask for which of the following IP classes?

  A. Class A

  B. Class B

  C. Class C

  D. Class D

  Correct Answer: B

  255.255.0.0 is a class B subnet mask.

  Reference. http://www.webopedia.com/TERM/S/subnet_mask.html

• Question 762:

  Which of the following features would hide internal IP addresses from the Internet?

  A. Network Address Translation

  B. Port forwarding

  C. Quality of Service

  D. SSID broadcast

  Correct Answer: A

  Reference. http://www.howstuffworks.com/nat.htm

• Question 763:

  Which of the following 802.11 standards can operate at both 2.4 GHz and 5.0 GHz?

  A. A

  B. B

  C. G

  D. N

  Correct Answer: D

  Reference. http://en.wikipedia.org/wiki/IEEE_802.11 (see 802.11n)

• Question 764:

  A single office with five computers and a server is an example of which of the following?

  A. PAN

  B. WAN

  C. SAN

  D. LAN

  Correct Answer: D

  Reference. http://wiki.answers.com/Q/How_does_a_LAN_work

• Question 765:

  Which of the following offers the HIGHEST wireless security?

  A. WEP

  B. WPA2

  C. WPA

  D. HTTPS

  Correct Answer: B

  Reference. http://www.pcworld.com/article/243713/how_safe_is_wpa2_secured_wifi_.html

• Question 766:

  An ISP has provided a DSL Internet connection with a static IP address. A technician is setting up a small office home office (SOHO) wireless router and needs to provide Internet access to five PCs on the network. Which of the following should be enabled?

  A. NAT

  B. WPS

  C. MAC filtering

  D. Port forwarding

  Correct Answer: A

  Reference. http://www.howstuffworks.com/nat.htm

• Question 767:

  New cabling has to be installed in a hospital with a very strict fire code. Which of the following materials would MOST likely be related to this requirement?

  A. Fiber Optic

  B. PVC

  C. Shielded Twisted Pair

  D. Plenum

  Correct Answer: D

  Plenum is a fire retardant cable with protective sheath. Therefore it is the best choice to use in a facility that uses strict fire code.

• Question 768:

  A technician is tasked with adding a Barcode Scanner to a user PC. Which of the following would MOST likely be used to make the connection to the PC? (Select TWO).

  A. RJ-45

  B. Serial port

  C. USB

  D. DB-15

  E. Infrared

  Correct Answer: BC

• Question 769:

  A technician is building a gaming computer for a client. The computer will have a 6- core processor, 16GB memory, and a high-end graphics card that takes up 2 slots on the motherboard. Which of the following power supply wattages would be BEST to install for this system?

  A. 200W

  B. 300W

  C. 400W

  D. 500W

  Correct Answer: D

• Question 770:

  During a POST, which of the following is being checked? (Select TWO).

  A. A count of available RAM

  B. The presence of a functioning CPU

  C. The presence of unknown peripherals

  D. Integrity of system files

  E. Network connectivity

  Correct Answer: AB