CompTIA CompTIA A+ 220-801 Questions & Answers

• Question 731:

  A new firewall has recently been installed and several users are now unable to access the Internet. Which of the following ports is MOST likely being blocked?

  A. 23

  B. 25

  C. 80

  D. 110

  Correct Answer: C

  Reference. http://en.wikipedia.org/wiki/Port_80

• Question 732:

  A technician needs to extend the wireless signal in a building. Which of the following should the technician use?

  A. Access Point

  B. Switch

  C. Hub

  D. Router

  Correct Answer: A

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

• Question 733:

  Which of the following would MOST likely be used for a gigabit connection?

  A. RG-6

  B. CAT6

  C. CAT5

  D. CAT3

  Correct Answer: B

  Reference. http://en.wikipedia.org/wiki/Category_6_cable

• Question 734:

  A technician is tasked with purchasing a wireless router that is backwards compatible with any other wireless device. Which of the following standards should the technician choose?

  A. 802.11a

  B. 802.11b

  C. 802.11g

  D. 802.11n

  Correct Answer: D

  Reference. http://en.wikipedia.org/wiki/IEEE_802.11#802.11n

• Question 735:

  Which of the following IP addresses can be pinged from the Internet?

  A. 10.0.0.1

  B. 68.14.24.3

  C. 172.16.2.1

  D. 192.168.1.1

  Correct Answer: B

  Any IP address that doesn't start with 192.168 and 10.0.0 can be pinged from internet. These IP addresses are reserved for private network. 172.16.2.1 is not a valid IP address at all because it mixed class C and Class A addresses.

  68.14.24.3 is a valid Class A IP address.

• Question 736:

  Which of the following connectors would MOST likely be used on a POTS line?

  A. BNC

  B. ST

  C. RJ-11

  D. RJ-45

  Correct Answer: C

  RJ-11 is an old cable technology that was used with old telephones at home known as POTs. http://en.wikipedia.org/wiki/Plain_old_telephone_service

• Question 737:

  Which of the following IEEE 802.11 standards operates natively in both the 2.4Ghz and 5Ghz spectrum?

  A. 802.11a

  B. 802.11b

  C. 802.11g

  D. 802.11n

  Correct Answer: D

  Reference. http://en.wikipedia.org/wiki/IEEE_802.11#802.11n

• Question 738:

  Which of the following would a technician need to setup a cable modem at a customer's home? (Select TWO).

  A. Coaxial

  B. CAT5e

  C. PVC

  D. Plenum

  E. Fiber

  Correct Answer: AB

  You need a coaxial cable that carrier TV and internet signals. Attach it to a cable modem and then use CAT5e to connect the computer to the modem.

• Question 739:

  Joe, a home user, reports that on occasion he cannot print from his laptop to his wireless printer. The problem seems to occur only when Joe is at one end of his home. A technician checks the signal strength of the laptop in that location and finds it to be good. The technician notes that Joe's router is using the default SSID with no encryption. Which of the following could be the issue?

  A. The printer drivers need to be updated on the laptop.

  B. The wireless printer does not have wake on LAN set properly.

  C. The laptop is picking up another router with default settings.

  D. The wireless network needs to have encryption turned on in order to print.

  Correct Answer: C

  If you keep the default SSID without encryption, your wifi can get mixed with another WIFI with default settings. To avoid this problem, create a unique SSID with strong encryption so it doesn't get mixed up in the air.

• Question 740:

  Which of the following wireless technologies is primarily setup for video/audio and the frequency is 5 GHz?

  A. Cellular

  B. 802.11a

  C. 802.11b

  D. Satellite

  Correct Answer: B

  Reference. http://compnetworking.about.com/cs/wireless80211/g/bldef_80211a.htm