Mod 12/13 WLAN concepts

10. If three 802.11b access points need to be deployed in close proximity, which three frequency channels should be used? (Choose three.)

1 6 11

21. A technician is about to install and configure a wireless network at a small branch office. What is the first security measure the technician should apply immediately upon powering up the wireless router?

Change the default user-name and password of the wireless router.

5. Which characteristic describes a wireless client operating in active mode?

must know the SSID to connect to an AP

14. What Wi-Fi management frame is regularly broadcast by APs to announce their presence?

beacon

16. Which type of management frame may regularly be broadcast by an AP?

beacon

1. In the context of mobile devices, what does the term tethering involve?

connecting a mobile device to another mobile device or computer to share a network connection

71. Which wireless network topology would be used by network engineers to provide a wireless network for an entire college building?

infrastructure

62. What type of wireless antenna is best suited for providing coverage in large open spaces, such as hallways or large conference rooms?

omnidirectional

2. When a wireless network in a small office is being set up, which type of IP addressing is typically used on the networked devices?

private

17. What are the two methods that are used by a wireless NIC to discover an AP? (Choose two.)

receiving a broadcast beacon frame transmitting a probe request

11. Which type of telecommunication technology is used to provide Internet access to vessels at sea?

satellite

69. Which type of wireless network uses low powered transmitters for a short-range network, usually 20 to 30 ft. (6 to 9 meters)?

wireless personal-area network

80. Which type of wireless network commonly uses Bluetooth or ZigBee devices?

wireless personal-area network

66. Which type of wireless network uses transmitters to provide coverage over an extensive geographic area?

wireless wide-area network

20. A network administrator is required to upgrade wireless access to end users in a building. To provide data rates up to 1.3 Gb/s and still be backward compatible with older devices, which wireless standard should be implemented?

802.11ac

68. What two IEEE 802.11 wireless standards operate only in the 5 GHz range? (Choose two.)

802.11ac 802.11a

6. Which IEEE standard operates at wireless frequencies in both the 5 GHz and 2.4 GHz ranges?

802.11n

3. A user has just purchased a generic home router and would like to secure it. What should be done to help secure the wireless home router?

Change the default administrator password.

82. A technician is troubleshooting a slow WLAN and decides to use the split-the-traffic approach. Which two parameters would have to be configured to do this? (Choose two.)

Configure the 5 GHz band for streaming multimedia and time sensitive traffic. Configure the 2.4 GHz band for basic internet traffic that is not time sensitive.

13. What is a difference between autonomous APs that operate in a home environment and controller-based APs that operate in a corporate environment?

Controller-based APs can be automatically configured and managed by a WLAN controller.

1. A user is configuring a wireless access point and wants to prevent any neighbors from discovering the network. What action does the user need to take?

Disable SSID broadcast.

13. Which type of wireless topology is created when two or more Basic Service Sets are interconnected by Ethernet?

ESS

11. A laptop cannot connect to a wireless access point. Which two troubleshooting steps should be taken first? (Choose two.)

Ensure that the wireless SSID is chosen. Ensure that the wireless NIC is enabled.

8. Which two roles are typically performed by a wireless router that is used in a home or small business? (Choose two.)

Ethernet switch access point

12. Which wireless network topology is being configured by a technician who is installing a keyboard, a mouse, and headphones, each of which uses Bluetooth?

ad hoc mode

7. Which statement describes an autonomous access point?

It is a standalone access point.

2. Which feature of 802.11n wireless access points allows them to transmit data at faster speeds than previous versions of 802.11 Wi-Fi standards did?

MIMO

58. A network administrator is working to improve WLAN performance on a dual-band wireless router. What is a simple way to achieve a split-the-traffic result?

Make sure that different SSIDs are used for the 2.4 GHz and 5 GHz bands.

14. Which WLC tab would a network administrator typically use to see a summary view of the most heavily used WLANs including the number of clients using a particular WLAN?

Monitor

12. In setting up a small office network, the network administrator decides to assign private IP addresses dynamically to workstations and mobile devices. Which feature must be enabled on the company router in order for office devices to access the internet?

NAT

50. Which service can be used on a wireless router to prioritize network traffic among different types of applications so that voice and video data are prioritized over email and web data?

QoS

9. What functionality is required on routers to provide remote workers with VoIP and videoconferencing capabilities?

QoS

4. Which protocol could be used by a company to monitor devices such as a wireless LAN controller (WLC)?

SNMP

4. Which parameter is commonly used to identify a wireless network name when a home wireless AP is being configured?

SSID

47. A company has recently implemented an 802.11n wireless network. Some users are complaining that the wireless network is too slow. Which solution is the best method to enhance the performance of the wireless network?

Split the traffic between the 2.4 GHz and 5 GHz frequency bands.

15. Users on an IEEE 802.11n network are complaining of slow speeds. The network administrator checks the AP and verifies it is operating properly. What can be done to improve the wireless performance in the network?

Split the wireless traffic between the 802.11n 2.4 GHz band and the 5 GHz band.

10. A wireless router is displaying the IP address of 192.168.0.1. What could this mean?

The wireless router still has the factory default IP address.

8. A customer installs a wireless access point at home in the closet next to the kitchen. The customer mentions that the wireless communication performance seems degraded when the cordless phone or the microwave oven is in use. What is the possible reason for this degradation?

The wireless signal is in the same radio frequency range as the household devices are in.

9. Which protocol and port numbers are used by both IPv4 and IPv6 CAPWAP tunnels? (Choose two.)

UDP 5246 and 5247

61. On a Cisco 3504 WLC Summary page ( Advanced > Summary ), which tab allows a network administrator to access and configure a WLAN for a specific security option such as WPA2?

WLANs

3. Which method of wireless authentication is currently considered to be the strongest?

WPA2

Which type of wireless network uses transmitters to cover a medium-sized network, usually up to 300 feet (91.4 meters)?

Wireless LANs (WLAN)

5. When configuring a Cisco 3500 series wireless LAN controller (WLC) for a WPA2 Enterprise WLAN, what has to be created on the WLC before creating the new WLAN?

a VLAN for the wireless network

6. What is a DHCP scope as it relates to a WLAN configured on the WLC controller?

a pool of IP addresses for WLAN clients

18. A technician is configuring the channel on a wireless router to either 1, 6, or 11. What is the purpose of adjusting the channel?

to avoid interference from nearby wireless devices

7. Why would a technician configure a passphrase for a WLAN on a wireless router?

to configure wireless client authentication

73. Which type of wireless network is suitable for use in a home or office?

wireless local-area network

60. Which type of wireless network is suitable for providing wireless access to a city or district?

wireless metropolitan-area network

72. Which type of wireless network uses transmitters to provide wireless service over a large urban region?

wireless metropolitan-area network

75. Which type of wireless network often makes use of devices mounted on buildings?

wireless metropolitan-area network