If you use a layered network design method in enterprise network design, what are the three levels of network?
A. Access layer
B. Convergence layer
C. Transport layer
D. Core layer
What is the default priority of VRRP?
A. 1
B. 0
C. 100
D. 255
Which of the following addresses can be used as an internet address?
A. 10.1.1.6/30
B. 10.1.1.7/30
C. 172.18.1.17/30
D. 224.1.1.16/30
The following description of the steps for Layer 2 roaming is wrong?
A. The STA listens to each channel beacon and finds that AP2 satisfies the roaming condition and sends a probe request to AP2.
B. AP2 responds by sending a response on channel 6 after receiving the request in channel 6 (the channel used by AP2)
C. The STA sends the 802.11 disassociation information to the AP1 through the channel 6 (the channel used by the AP2), and the association between the user and the AP1 is released.
D. The STA sends an association request to AP2 through channel 6, and AP2 responds with the association response to establish an association between the user and AP2.
Which of the following objects or materials has the highest penetration loss to WLAN signals?
A. Wooden door
B. Glass window
C. Brick wall
D. Metal
Which two APs below support the 802.11ac standard?
A. AP5030DN
B. AP5130DN
C. AP6510DN
D. AP7110DN
What is wrong about the Fresnel region?
A. The Fresnel zone of the radio beam is an ellipsoidal region that surrounds the visible line of sight directly.
B. The antenna installation position should ensure that the two nodes of the link are visible, and try to ensure that there is no obstruction in the Fresnel zone.
C. Two nodes of the site link are visible, and the Fresnel zone boundary is blocked, which will not affect the link transmission effect.
D. The distance between the stations is 2 kilometers, and the radius of the Fresnel area is about 6 meters.
Which of the following is the highest security strength of the encryption algorithm?
A. WEP
B. CCMP
C. TKIP
D. DES
Xiao Zhang is the network administrator of a hotel. One day he found that the hotel's visitors could not access the network normally. After checking, the visitor's equipment was wrong. Incorrect IP address, in order to prevent this kind of attack, which of the following technologies should be used in the network?
A. DHCP Snooping
B. Dynamic ARP Detection (DAI)
C. IP Source Protection (IPSG)
D. MAC certification
FAT AP is also called "fat" AP architecture or self-contained structure. It is mainly used in large and medium-sized enterprise networks and belongs to mainstream architecture solutions.
A. True
B. False
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