16.
How often are BPDUs sent from a layer 2 device?
A. Never
B. Every 2 seconds
C. Every 10 minutes
D. Every 30 seconds
Answer: Option B
Explanation:
Every 2 seconds, BPDUs are sent out from all active bridge ports by default.
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17.
How many broadcast domains are created when you segment a network with a 12-port switch?
A. 1
B. 2
C. 5
D. 12
Answer: Option A
Explanation:
By default, switches break up collision domains but are one large broadcast domain.
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18.
What does the command routerA(config)#line cons 0 allow you to perform next?
A. Set the Telnet password.
B. Shut down the router.
C. Set your console password.
D. Disable console connections.
Answer: Option C
Explanation:
The command line console 0 places you at a prompt where you can then set your console user-mode password.
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19.
Which router command allows you to view the entire contents of all access lists?
A. show all access-lists
B. show access-lists
C. show ip interface
D. show interface
Answer: Option B
Explanation:
To see the contents of all access lists, use the show access-lists command.
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20.
Which class of IP address has the most host addresses available by default?
A. A
B. B
C. C
D. A and B
Answer: Option A
Explanation:
Class A addressing provides 24 bits for host addressing.