多項選擇題Which of the following IP hosts would be valid for PC users, assuming that a /27 network mask was used for all of the networks?（）

A.15.234.118.63
B.83.121.178.93
C.134.178.18.56
D.192.168.19.37
E.201.45.116.159
F.217.63.12.192


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1.單項選擇題How would you express the binary number: 10101010 in its decimal and hexadecimal forms?（）

A. Decimal=160, hexadecimal=00
B. Decimal=170, hexadecimal=AA
C. Decimal=180, hexadecimal=BB
D. Decimal=190, hexadecimal=CC

3.單項選擇題You have a single Class C IP address and a point-to-point serial link that you want to implement VLSM on. Which subnet mask is the most efficient?（）

A. 255.255.255.0
B. 255.255.255.240
C. 255.255.255.248
D. 255.255.255.252
E. 255.255.255.254

4.單項選擇題On the topic of VLSM, which one of the following statements best describes the concept of the route aggregation?（）

A. Deleting unusable addresses through the creation of many subnets.
B. Combining routes to multiple networks into one supernet.
C. Reclaiming unused space by means of changing the subnet size.
D. Calculating the available host addresses in the AS.



5.單項選擇題Which one of the following varieties of NAT utilizes different ports to map multiple IP addresses to a single globally registered IP address?（）

A. Static NAT
B. Port loading
C. NAT Overloading
D. Dynamic NAT
E. None of the above

6.單項選擇題A TestKing PC has the IP address 172.16.209.10 /22. What is the subnet of this address?（）

A.172.16.42.0
B.172.16.107.0
C.172.16.208.0
D.172.16.252.0
E.172.16.254.0


9.多項選擇題You have a class B network with a 255.255.255.0 mask. Which of the statements below are true of this network?（）

A. There are 254 usable subnets.
B. There are 256 usable hosts per subnet.
C. There are 50 usable subnets.
D. There are 254 usable hosts per subnet.
E. There are 24 usable hosts per subnet.
F. There is one usable network.

10.單項選擇題The 201.145.32.0 network is subnetted using a /26 mask. How many networks and IP hosts per network exists using this subnet mask?（）

A. 4 networks with 64 hosts
B. 64 networks and 4 hosts
C. 2 networks and 62 hosts
D. 62 networks and 2 hosts
E. 6 network and 30 hosts

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What is the purpose of typing o/r 0x2142 during a password recover procedure on a 2500 series router?（）

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What feature of a networks switch allows an administrative to create separate broadcast domains?（）

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What is the subnetwork address for a host with IP address 201.100.5.68/28?（）

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Which of the following contribute to congestion on an Ethernet network?（）

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Which of the following statements regarding routed and routing protocols are true?（）

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Identify three valid host addresses in the 192.168.27.0 network with a subnet mask of 255.255.255.240. （）

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New switches have been purchased for a network upgrade. The objective for the network design emphasizes efficient, error-free transport instead of fast transport.Which switching mode should be configured on the new switches to provide error-free transport to the network? （）

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A technician at TestKing needs to update the network documentation. One of the tasks includes documenting the name of the IOS image file of each router in the network.Which commands could be used to find this information?（）

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What should the configuration register value be after successfully completing the password recover procedure and returning the router to normal operation? （）

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