CCNA Practice Tests
CCNA Home Page
CCNA Practice Test
Routing and Switching
Security
Data Center
Service Provider
Voice
Wireless
Contact
Privacy Policy
Take a Practice Test
CCNA Practice Test
Routing and Switching
Security
Data Center
Service Provider
Voice
Wireless
CCNA Data Center Practice Test
Question 1 of 3
What is the subnet mask for the network 172.16.0.0/21?
A
255.255.248.0
B
255.255.248.240
C
255.255.255.248
D
255.255.0.0
E
255.255.255.0
F
255.255.255.240
Next