單項(xiàng)選擇題How many subnets can be gained by subnetting 172.17.32.0/23 into a /27 mask, and how many usable host addresses will there be per subnet?()

A. 8 subnets, 31 hosts
B. 8 subnets, 32 hosts
C. 16 subnets, 30 hosts
D. 16 subnets, 32 hosts
E. A Class B address can't be subnetted into the fourth octet.


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2.單項(xiàng)選擇題On the network 131.1.123.0/27, what is the last IP address that can be assigned to a host?()

A. 131.1.123.30
B. 131.1.123.31
C. 131.1.123.32
D. 131.1.123.33

3.單項(xiàng)選擇題All WAN links inside the ABC University network use PPP with CHAP for authentication security. Which command will display the CHAP authentication process as it occur between two routers in the network?()

A. show chap authentication
B. show interface serial0
C. debug ppp authentication
D. debug chap authentication
E. show ppp authentication chap

5.單項(xiàng)選擇題What is one reason that WPA encryption is preferred over WEP?()

A. A WPA key is longer and requires more special characters than the WEP key.
B. The access point and the client are manually configured with different WPA key values.
C. WPA key values remain the same until the client configuration is changed.
D. The values of WPA keys can change dynamically while the system is used.