單項(xiàng)選擇題You have a Class C network, and you need ten subnets. You wish to have as many addresses available for hosts as possible. Which one of the following subnet masks should you use?（）

A. 255.255.255.192
B. 255.255.255.224
C. 255.255.255.240
D. 255.255.255.248
E. None of the above


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1.多項(xiàng)選擇題Which two of the addresses below are available for host addresses on the subnet 192.168.15.19/28?（）

A.192.168.15.17
B.192.168.15.14
C.192.168.15.29
D.192.168.15.16
E.192.168.15.31
F.None of the above

2.單項(xiàng)選擇題How do you express the binary number 10110011 in decimal form?（）

A.91
B.155
C.179
D.180
E.201
F.227

3.單項(xiàng)選擇題The MAC address for your PC NIC is: C9-3F-32-B4-DC-19. What is the address of the OUI portion of this NIC card, expressed as a binary number?（）

A.11001100-00111111-00011000
B.11000110-11000000-00011111
C.11001110-00011111-01100000
D.11001001-00111111-00110010
E.11001100-01111000-00011000
F.11111000-01100111-00011001

4.單項(xiàng)選擇題How would the number 172 be expressed in binary form?（）

A.10010010
B.10011001
C.10101100
D.10101110

5.單項(xiàng)選擇題How would the number 231 be expressed as a binary number?（）

A. 11011011
B. 11110011
C. 11100111
D. 11111001
E. 11010011

6.單項(xiàng)選擇題Which one of the binary number ranges shown below corresponds to the value of the first octet in Class B address range?（）

A. 10000000-11101111
B. 11000000-11101111
C. 10000000-10111111
D. 10000000-11111111
E. 11000000-10111111

8.多項(xiàng)選擇題You have the binary number 10011101. Convert it to its decimal and hexadecimal equivalents.（）

A. 158
B. 0x9D
C. 156
D. 157
E. 0x19
F. 0x9F

9.單項(xiàng)選擇題If a host on a network has the address 172.16.45.14/30, what is the address of the subnetwork to which this host belongs?（）

A. 172.16.45.0
B. 172.16.45.4
C. 172.16.45.8
D. 172.16.45.12
E. 172.16.45.18

10.多項(xiàng)選擇題CDP is running between two TestKing devices. What information is supplied by CDP?（）

A. Device identifiers
B. Capabilities list
C. Platform
D. Route identifier
E. Neighbor traffic data