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A, B, and D are incorrect; they do not provide a maximum of 126 hosts.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 233-236.
Q. 137
In Cisco IOS software, which command displays the backup configuration?
A. show flash
B. show version
C. show tftp-config
D. show backup-config
E. show startup-config
Answer: E
Explanation: This shows the startup configuration in NVRAM, which is the backup for the running
configuration that runs in RAM.
Incorrect Answers:
A is incorrect; show flash command lists the contents of the flash showing the IOS images that are stored.
Remember, the backup configuration is in the NVRAM, not Flash nor RAM.
B is incorrect; this command shows information on the running configuration.
C is incorrect; this is not a valid command.
C is incorrect; this is not a valid command.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 98-99, 131.
Q. 138
What are the characteristics of UDP?
A. It is reliable and acknowledged
B. It is unreliable and acknowledged
C. It is reliable and unacknowledged
D. It is unreliable and unacknowledged
Answer: D
Explanation: UDP is connectionless and unacknowledged protocol. Although UDP is responsible for
transmitting messages, no checking for segment delivery is provided at this layer. UDP depends on upper-layer
protocols for reliability.
Incorrect Answers: