Subnetting Questions

Question

Which of the following subnets allow to create a maximum of 30 usable host addresses on a subnet? (Choose two)

A. /26
B. /27
C. /28
D. 255.255.255.192
E. 255.255.255.224
F. 255.255.255.240

Answer: B E

Question

A default gateway is assigned the IP address of 168.9.10.67/28. Which IP addresses can be assigned to a host that use the above default gateway? (Choose two)

A. 168.9.10.63
B. 168.9.10.64
C. 168.9.10.65
D. 168.9.10.79
E. 168.9.10.78

Answer: C E

Question

What is the binary number of decimal 240?

A. 11110000
B. 11100000
C. 11000000
D. 11111000
E. 11111100

Answer: A

Question

What is the broadcast address of the 6th subnet created by the 192.168.1.0/28?

A. 192.168.1.80
B. 192.168.1.65
C. 192.168.1.96
D. 192.168.1.95

Answer: D

Explanation

Increment: 16
1st: 192.168.1.0
2nd: 192.168.1.16
3rd: 192.168.1.32
4th: 192.168.1.48
5th: 192.168.1.64
6th: 192.168.1.80
7th: 192.168.1.96

Question

What is the best subnet mask used for point-to-point connection?

A. /29
B. /30
C. /31
D. /32
E. /0

Answer: B