testpassport 640-721 题库

shijunhua618

CCNA 640-721 试题库由资深IT认证讲师和 CCNA 产品专家结合 PROMETRIC
或 VUE
的真实考试环境最新原题倾心打造.最新 testpassport640-721

1. For the following items ,which one correctly describes fading?

A. A function of the frequency and should be provided in the cable specification by the vendor.

B. Another signal source is producing energy on the channel in which you are trying to operate.

C. A time-varying change in the path loss of a link with the time variance governed by the movement of

objects in the environment, including the transmitter and receiver themselves.

D. The desired signal reaches the receiving antenna via multiple paths, each of which has a different

propagation delay and path loss.

Answer: C

2. Observe the following statements, which limitation applies to the use of the Cisco WLAN Solution

Management over Wireless feature?

A. Read-write access is not available; only read-only access is supported.

B. Controllers must be managed using only secure protocols (that is, SSH and HTTPS), not nonsecure

protocols (that is, HTTP and Telnet).

C. Uploads and downloads from the controller are not allowed.

D. Wireless clients can manage other controllers however not the same controller and AP to which the

client is associated.

Answer: C

3. As a network technician ,you must know Cisco WiSMs . Up to how many Cisco WiSMs are supported in

a single mobility group operating under v5.0 code?

A. 16

B. 12

C. 24

D. 5

Answer: B

4. You work as a network technician at Cisco.com, read this subject carefully ,then answer the question.

The existing Cisco Unified Wireless Controller is running v5.0 code for both the controllers and the Cisco

WCS. A controller has been configured with an appropriate rogue rule condition to report discovered APs

to the Cisco WCS. What default alarm level is used to display all rogue APs in the Alarm Summary?

A. Major

B. Critical

C. Flash

D. Minor

Answer: D

5. What are the four types of wireless networks?(Choose four)

A. Wireless PAN

B. LAN

C. MAN

D. VLAN

E. WAN

Answer: ABCE

6. Cisco Client Management Frame Protection is running on a mobility group with two controllers. For the

following options ,which two MFP requirements protect the network? (Choose two.)

A. requires the use of a nonbroadcast SSID

B. requires CCXv5

C. implements the validation of wireless management frames

D. forces clients to authenticate, using a secure EAP method only

Answer: BC

7. What happens when client exclusion is enabled with a timeout value of zero ?

A. Clients are excluded indefinitely.

B. Client exclusion is disabled.

C. Clients are never excluded.

D. Clients must be explicitly included by specifying the MAC address.

Answer: A

8. The central office is currently using a combination of 4400 and 2100 series WLAN controllers running

v4.2 and a variety of LWAPP-enabled access points servicing both 2.4 GHz and 5 GHz. The WLAN

deployment has been extended to each remote office by implementing a 526 WLAN controller running

v4.1 and several 521 access points. Wireless client deployment uses EAP-TLS authentication by use of a

centralized RADIUS server plus 802.11n for performance. After the first remote office deployment, remote

office users complain that they are not connecting via 802.11n.

Which will most likely cause this problem?

A. The 521 AP does not support 5 GHz, which prohibits 802.11n.

B. The 521 AP and 526 WLAN controllers do not support AES, which prohibits 802.11n.

C. The 526 WLAN controller does not support external authentication via RADIUS, prohibiting

authentication.

D. The 526 WLAN controller does not support 802.11n with either v4.1 or v4.2.

Answer: D

9. How do the characteristics that are available on the Cisco WCS for Linux version differ from those of

the Cisco WCS for Windows version?

A. Cisco WCS for Linux is required for deployments.

B. Assuming that there are no differences in hardware, a Cisco WCS for Linux can support up to 750

wireless LAN controllers. A Cisco WCS for Windows can support up to 250 wireless LAN controllers.

C. Cisco WCS for Windows includes support for Cisco Spectrum Expert clients. Cisco WCS for Linux

does not support Cisco Spectrum Expert clients.

D. There are no differences in features between the Linux and Windows versions of Cisco WCS.

Answer: D

10. What is the typical maximum range of a wireless PAN?

A. 45 feet

B. 50 feet.

C. 55 feet

D. 60 feet

Answer: B

有需要的朋友自己下载(PDF格式)