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Answer: A
Explanation: This is a CIDR problem, also called supernetting. When you see the /xx notation, the xx is the consecutive number of one bits in the subnet mask. In this case, /30 = 30, and is also a subnet mask of 255.255.255.252. This leaves 2 bits (4 hosts) for host addressing, however since we reserve 2 addresses, that leaves a net of 2 Host Addresses, max.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages
Q. 132
Which command displays the IP addresses assigned to specific host names?
A.show hosts
B.show interface
C.ping host name
D.config host name
E.show host mapping
F.show host name IP address
G.trace IP addresses host name
Answer: A
Explanation: The show hosts command displays a cached list of host names and addresses.
Incorrect Answers:
B is incorrect; the show interface command is used to display the configuration of an interface. C – G are incorrect; these are not valid commands.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 106,
Q. 133
At which layer of the OSI model does the ping command operate?
A.Session
B.Network
C.Transport
D.Maintenance
Answer: B
Explanation:
As the ping command is used to test network connectivity it resides on the network layer of the OSI model. 124
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