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HCIA-WLAN H12-311-ENU Exam and Certification Test Engine
Huawei H12-311-ENU Exam Syllabus Topics:
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NEW QUESTION 59
For the polarization of the antenna, which of the following description is correct? (Multiple choice)
- A. If the electric field of the electric wave is perpendicular to the ground, we call it a vertically polarized wave.
- B. The polarization of the antenna refers to the direction of the magnetic field strength formed by the antenna radiation.
- C. If the transmitting antenna is circularly polarized, the receiving antenna must also be circularly polarized and the polarization directions of both must be the same.
- D. The antenna radiates electromagnetic waves to the surrounding space, and the direction of the electric field changes according to a certain law.
Answer: A,C,D
NEW QUESTION 60
When WLAN planning is performed in a single area, the factors affecting the number of APs deployed are (Select 3 Answers).
- A. Number of people accessing in the area
- B. Number of network ports
- C. Field strength and bandwidth requirements
- D. Size of the area
Answer: A,C,D
NEW QUESTION 61
WDS technology increases the flexibility and convenience of the entire network structure, but only supports peer-to-peer mode of operation.
- A. False
- B. True
Answer: A
NEW QUESTION 62
The AC6605 supports three ways to establish AP and AC interworking. What are the options (Select 3 Answers)?
- A. Find the AP through multicast and automatically go online
- B. Automatically discover AP and go online normally
- C. Automatically discover the AP and confirm the online
- D. Offline increase AP
Answer: B,C,D
NEW QUESTION 63
What is the radio physical layer technology used by 802.11ac?
- A. DSSS
- B. QAM
- C. FHSS
- D. OFDM
Answer: D
NEW QUESTION 64
The gain of antenna A is 11dBi, and the gain of antenna B is 8dBi. It can be said that antenna A has a larger gain than antenna B.
- A. 3dBd
- B. 3dBi
- C. 3dB
- D. Uncertain
Answer: B,C,D
NEW QUESTION 65
Regarding the networking method, the following description is correct.
- A. The advantage of the three-layer networking is that the configuration is simple and the networking is easy.
- B. Compared with the three-layer networking, the second-tier networking is more suitable for large networks such as parks and stadiums.
- C. In the direct connection network, the service data of the AP can directly reach the uplink network without going through the AC.
- D. If the AC's ability to process data is weak, it is recommended to use a side-by-side networking.
Answer: D
NEW QUESTION 66
TKIP encryption is more secure than WEP encryption because (Select 3 Answers).
- A. Added a key distribution mechanism, no longer using a single key
- B. Adopting a more complex encryption algorithm
- C. Adopt a longer IV
- D. Using a stronger data verification algorithm
Answer: A,C,D
NEW QUESTION 67
Huawei AP can also implement AP-based load balancing in Fat AP mode.
- A. False
- B. True
Answer: A
NEW QUESTION 68
Regarding the two major standards of PoE, the following statement is incorrect (Select 2 Answers). The
- A. 802.at, also known as PoE+, is compatible with 802.af devices.
- B. 802.af, also known as PoE+, is compatible with 802.at devices.
- C. 802.at supports four power levels and only supports Category 5 lines.
- D. 802.af standard was established in 2009, and the maximum output power is 30W.
Answer: B,D
NEW QUESTION 69
Engineer A used many utilize used equipment APs during the project rectification process. It was found that some APs could go online, and some APs could not go online. Which of the following descriptions are correct? (Multiple Choice)
- A. AP authentication mode is no-auth. If the AP is not online, it is likely that the AP itself is faulty.
- B. AP authentication mode is no-auth. Since the batch AP is utilize used equipment AP, the AP that can go online may have been online on this AC.
- C. AP authentication method is sn-auth. Since the batch AP is utilize used equipment AP, the AP that can go online may be online on this AC.
- D. AP authentication mode is mac-auth. Since the batch AP is utilize used equipment AP, the AP that can go online may be online on this AC.
Answer: A,C,D
NEW QUESTION 70
What is the working frequency band used by the original 802.11 protocol?
- A. 2.4 GHz
- B. 900 MHz
- C. 2.0 GHz
- D. 5 GHz
Answer: A
NEW QUESTION 71
What is the security policy based on user authentication that is currently widely used in enterprise networks? (Multiple Choice)
- A. WPA1 PSK+TKIP/CCMP
- B. WPA2 802.1X+TKIP/CCMP
- C. WPA1 802.1X+TKIP/CCMP
- D. WPA2 PSK+TKIP/CCMP
Answer: B,C
NEW QUESTION 72
The user authentication-based security policy that is currently used extensively in enterprise networks is (Select 2 Answers).
- A. WPA1 PSK+TKIP/CCMP
- B. WPA2 802.1X+TKIP/CCMP
- C. WPA1 802.1X+TKIP/CCMP
- D. WPA2 PSK+TKIP/CCMP
Answer: B,C
NEW QUESTION 73
The BSSID is actually the MAC address of the AP and is used to identify the BSS managed by the AP.
- A. False
- B. True
Answer: A
NEW QUESTION 74
20dBm is equivalent to mW.
- A. 0
- B. 1
- C. 2
- D. 3
Answer: A
NEW QUESTION 75
Each AC device needs to specify the source IP address of the AC to establish a CAPWAP tunnel with the AP. One AC can specify up to two WLAN source IP addresses.
- A. False
- B. True
Answer: A
NEW QUESTION 76
In China, which of the following is the outdoor WLAN band supported by the Radio Management Committee?
- A. 2.4-2.4835GHz
- B. 5.725-5.850GHz
- C. 5.25-5.35GHz
- D. 5.15-5.25GHz
Answer: A,B
NEW QUESTION 77
The antenna has a power amplification function.
- A. FALSE
- B. TRUE
Answer: A
NEW QUESTION 78
According to the following configuration example, the following statement is correct.
[AC] dhcp enable
[AC] interface VLANif100
[AC-VLANif100] ip address 10.1.100.1 24
[AC-VLANif100] dhcp select interface
[AC-VLANif100] quit
- A. If VLAN 100 is a user VLAN, the gateway is 10.1.100.1 and the mask is 255.255.255.0 after the user receives the address.
- B. The DHCP service is enabled by default in the global mode, so the dhcp enable can be configured.
The - C. dhcp select interface command enables the DHCP client function on the interface of VLAN 100.
- D. If VLAN 100 is the management VLAN where the AP is located, the option 43 field in the DHCP message received by the AP should be 10.1.100.1.
Answer: A
NEW QUESTION 79
Configure the security profile of the wireless network as WEP. You need to configure the security profile on the AC6605 as follows.
- A. authentication policy wpa Wpa authentication-method share-key Wpa key wpa-40 hex 0 1234567890 Wpa default-key 0
- B. security-policy wep Policy wep share-key Wep key wep-40 hex 0 1234567890 Wep default-key 0
- C. security-policy wep Wep authentication-method open Wep key wep-40 hex 0 1234567890 Wep default-key 0
- D. authentication policy wpa2 Wpa2 authentication-method share-key Wpa2 key wpa2-40 hex 0 1234567890 Wpa2 default-key 0
Answer: B
NEW QUESTION 80
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