A retail store uses a wireless network for its employees to access inventory from anywhere in the store. Due to concerns regarding the aging wireless network, the store manager has brought in a consultant to harden the network. During the site survey, the consultant discovers that the network was using WEP encryption. Which of the following would be the BEST course of action for the consultant to recommend?
A. Replace the unidirectional antenna at the front of the store with an omni-directional antenna. B. Change the encryption used so that the encryption protocol is CCMP-based. C. Disable the network’s SSID and configure the router to only access store devices based on MAC addresses. D. Increase the access point’s encryption from WEP to WPA TKIP.
Answer: B
Explanation: CCMP is the standard encryption protocol for use with the WPA2 standard and is much more secure than the WEP protocol and TKIP protocol of WPA. CCMP provides the following security services: Data confidentiality; ensures only authorized parties can access the information Authentication; provides proof of genuineness of the user Access control in conjunction with layer management
Incorrect Options:
A: The antenna type deals with signal strength and direction. It will not have a bearing on whether technology is older.
C: This option would “cloak” the network, not harden the network.
D: WPA2, which uses CCMP as its standard encryption protocol, more secure than WPA-TKIP.
Reference: http://en.wikipedia.org/wiki/CCMP http://en.wikipedia.org/wiki/Wi-Fi_Protected_Access Stewart, James Michael, CompTIA Security+ Review Guide, Sybex, Indianapolis, 2014, pp. 61, 63
A user with an 802.11n WLAN card is connected to a SOHO network and is only able to connect at 11 Mbps with full signal strength. Which of the following standards is implemented on the network?
A. 802.11a B. 802.11ac C. 802.11b D. 802.11g
Correct Answer: C
Explanation: 802.11 is a set of IEEE standards that govern wireless networking transmission methods. The 802.11 standards commonly used today to provide wireless connectivity in home or office wireless networks are 802.11a, 802.11b, 802.11g, 802.11n and 802.11ac. 802.11b supports speeds up to 11Mbps and uses the 2.4GHz frequency. In this question, the user is using an 802.11n WLAN card. Although the 802.11n WLAN card can support speeds up to 300Mbps, the user is only able to connect at 11Mbps because the user is connected to a wireless network configured to use 802.11b.
A SOHO would like to limit usage of their wireless network to two computers. Which of the following would be the EASIEST way for a technician to accomplish this?
A. Assign static IP addresses B. Change the signal strength C. Disable unused ports on the router D. Enable MAC filtering
A laptop user reports that they cannot see the SSID or connect to their companys wireless network. Which of the following should the technician try FIRST?
A. Check the wireless settings in the OS B. Replace the internal wireless adapter C. Check the wireless on/off switch D. Check the signal strength
Peter, a home user, reports that on occasion he cannot print from his laptop to his wireless printer. The problem seems to occur only when Peter 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 Peter’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
Explanation: 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.
A laptop’s wireless card shows up in the Device Manager, but the signal strength is always one bar. This is caused by which of the following?
A. The signal is disabled in the wireless utility B. Disconnected or broken antenna C. Disconnected or broken inverter D. The wireless switch is turned off