H12-311HCNA-WLAN Examination

1.( alphabetic)When was wireless network first used? (  )
A. WWI
B. WWII
C. Later 20th century
D. After 2000
 
2.( alphabetic)Which one of the following is the national WLAN security standard of China?  (  )
A. WiFi
B. WiMAX
C. WLAN
D. WAPI
 
3.( multiple alphabetic)Which of the following standards support the 2.4 GHz band?  (  )
A. 802.11a
B. 802.11b
C. 802.11g
D. 802.11n
 
4.( alphabetic)Which of the following port is used for control tunnel of CAPWAP? (  ).
A. TCP: 5246
B. TCP: 5247
C. UDP: 5246
D. UDP: 5247
 
5.( alphabetic)How many channels exist in the 2.4 GHz band?(  )
A. 14
B. 13
C. 11
D. 3
 
6.( multiple alphabetic)Which of the following standards support the 5 GHz band? (  )
A. 802.11n
B. 802.11a
C. 802.11b
D. 802.11g
 
7.( alphabetic)What’s the command of switching LSW and ACU when initial configuring AC?(  )
A. Ctrl X
B. Ctrl Y
C. Ctrl Z
D. Ctrl shift
 
8.( alphabetic)An STA roams between different VLANs. Which is the roaming type? (  )
A. Seamless AP roaming
B. Layer 2 roaming
C. Layer 3 roaming
D. Layer 4 roaming
 
9.( alphabetic)Which of the following is used by a STA to connect to a WLAN? （  ）
A. SSID
B. BSA
C. ESA
D. IBSS
 
10.( multiple alphabetic)What is the basic modules of centralized architecture of WLAN? (  )
A. STA
B. Fit AP
C. Fat AP
D. AC
 
11.( alphabetic)How many APs can an ACU (SPU) maximum manage? (  )
A. 128
B. 256
C. 512
D. 1024
 
12.( multiple alphabetic)Which of the following conditions of QoS include?  (  )
A. Bandwidth
B. IP conflict
C. Delay
D. Can not go online
 
13.( alphabetic)Huawei WDS is only support point to point network topology.   (  )
A. True
B. False
 
14.( multiple alphabetic)What are the three types of 802.11 frames? (  ).
A. Data frame
B. Control frame
C. Service frame
D. Management frame
 
15.( alphabetic)The 802.11b standard is based on OFDM (Orthogonal Frequency Division Multiplexing).(  )
A. True
B. False
 
16.( multiple alphabetic)In 802.11 WLAN, which of the following are included in the CSMA/CA mechanism? (  )
A. Carrier sense
B. Multiple Access
C. Collision Detection
D. Collision Avoidance
 
17.( multiple alphabetic)Which of the following frequencies belong to 802.11n frequency band? (  )
A. 2.4-2.4835GHz
B. 5.15-5.25GHz
C. 5.25-5.35GHz
D. 5.728-5.825GHz
 
18.( multiple alphabetic)What’re the two standards of POE? (  )
A. IEEE 802.3ad
B. IEEE 802.3af
C. IEEE 802.3as
D. IEEE 802.3at
 
19.( alphabetic)Which of the following AC parameter is firstly compared when choosing the priority for Dual-link backup? （  ）
A. Priority
B. Device load
C. IP address
D. MAC address
 
20.( alphabetic)Which characteristics should an antenna have for outdoor long distance point-to-point transmission? (  )
A. High gain, small lobe width
B. High gain, large lobe width
C. Omnidirectional
D. Low gain, large lobe width