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Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 163-165.
Q. 48
Which of the following are true regarding passwords on a Cisco router?
A. All passwords can be encrypted.
B. All passwords can be entered using the set-up dialogue.
C. A password can be set before a user can enter the privileged mode.
D. A password can be set for individual lines.
E. TACACS or Radius password authentication can be used.
Answer: A, C, D, E
Explanation: In general enabled passwords are not encrypted but with the service password-encryption
command all passwords are encrypted. Passwords are entered in the privileged mode and they can be set for
individual lines. In addition TACAS or Radius password authentication can also be used.
Incorrect Answers:
B is incorrect; the set-up dialogue box can only be used to enter some passwords.
Steve McQuerry. Interconnecting Cisco Network Devices. (Cisco Press: 2000) pages 102-103.
Q. 49
What is the maximum number of subnets that can be assigned to networks when using the address
172.16.0.0 with a subnet mask of 255.255.240.0? (Assume older version UNIX workstations are in use.)
A. 16
B. 32
C. 30
D. 14
E. It is an invalid subnet mask for the Network
Answer: D
Explanation: 172.16.0.0 is a Class B IP address. With a subnet mask of 255.255.240.0 they maximum number
of subnets are 14 and 4094 hosts.
Incorrect Answers:
A is incorrect; 16 is not a valid maximum number of subnets for a Class B IP address.
B is incorrect; 32 is not a valid maximum number of subnets for a Class B IP address.
D is incorrect; for a maximum number of subnets to be 30 the subnet mask would need to be 255.255.248.0.
E is incorrect; 255.255.240.0 is a valid subnet mask.