CompTIA CompTIA A+ 220-801 Questions & Answers

• Question 651:

  Which of the following Internet connection types would be MOST commonly used by a customer who travels frequently?

  A. ISDN

  B. Satellite

  C. Cellular

  D. Line of site wireless

  Correct Answer: C

  Reference. http://en.wikipedia.org/wiki/Cellular_network

• Question 652:

  Which of the following describes the function of a hub in a network?

  A. Broadcasts packets it receives to specific connections

  B. Determines whether a packet belongs on an internal or external network

  C. Converts a packet for transmission from one network to another network

  D. Broadcasts packets it receives to all connections

  Correct Answer: D

  Reference. http://freewimaxinfo.com/network-hubs.html

• Question 653:

  Which of the following describes the function of a switch in a network?

  A. Transmits packets it receives to specific connections

  B. Converts a packet for transmission from one network to another network

  C. Determines whether a packet belongs on an internal or external network

  D. Broadcasts packets it receives to all connections

  Correct Answer: A

  Reference. http://en.wikipedia.org/wiki/Network_switch

• Question 654:

  A user wants to secure their home wireless network and allow only certain devices access to the network. Which of the following measures would be the MOST effective means of limiting access?

  A. Turn off DHCP

  B. Use MAC filtering

  C. Disable DMZ

  D. Turn off SSID broadcasting

  Correct Answer: B

  MAC filtering allows only certain devices to access the network. It has no specific policies or rules. The Mac addresses of devices that you want to allow can be configured in mac filtering and only those devices will access the network.

• Question 655:

  Which of the following networking standards can operate at two different channel widths on the same spectrum simultaneously?

  A. 802.11a

  B. 802.11b

  C. 802.11g

  D. 802.11n

  Correct Answer: D

  Reference. http://compnetworking.about.com/od/wireless80211/g/bldef_80211n.htm

• Question 656:

  A customer would like to upgrade their onboard fast Ethernet connection to connect to their new gigabit network at the gigabit speed. Which of the following will enable them to do so?

  A. Convert the user to wireless.

  B. Install a 10/100/1000 NIC.

  C. Update the drivers for the onboard port.

  D. Flash the BIOS to unlock the Ethernet port.

  Correct Answer: B

  Reference. http://en.wikipedia.org/wiki/Network_interface_controller

• Question 657:

  Which of the following has a MAXIMUM transmission speed of 10 Mbps?

  A. CAT3

  B. CAT5

  C. CAT5e

  D. CAT6

  Correct Answer: A

  Reference. http://customcable.ca/cat5-vs-cat6/

• Question 658:

  Which of the following 802.11 standards has the MAXIMUM throughput of 11 Mbps?

  A. A

  B. B

  C. G

  D. N

  Correct Answer: B

  Reference. http://en.wikipedia.org/wiki/IEEE_802.11

• Question 659:

  Which of the following communication standards requires line-of-site with no obstacles in order to operate properly?

  A. Bluetooth

  B. IR

  C. RF

  D. WiFi

  Correct Answer: B

  Reference. http://www.di.unisa.it/~vitsca/RC-0910I/ch04.pdf (page 25)

• Question 660:

  Which of the following needs to be configured on a wireless router to allow specific client machines to connect?

  A. Port forwarding

  B. WPS

  C. MAC filtering

  D. DMZ

  Correct Answer: C

  Reference. http://compnetworking.about.com/cs/wirelessproducts/qt/macaddress.htm