Announcement

**thanhminhnt** · 20-03-2012, 04:53 PM

1. If mask 255.255.255.128 were used with a Class B network, how many subnets could
exist, with how many hosts per subnet, respectively?
a. 256 and 256
b. 254 and 254
c. 62 and 1022
d. 1022 and 62
e. 510 and 126
f. 126 and 510
2. If mask 255.255.255.240 were used with a Class C network, how many subnets could
exist, with how many hosts per subnet, respectively?
a.16 and 16
b.14 and 14
c.12 and 12
d.8 and 32
e.32 and 8
f.6 and 30
g.30 and 6
3. Which of the following subnet masks lets a Class B network allow subnets to have up to
150 hosts and up to 164 subnets?
a.255.0.0.0
b.255.255.0.0
c.255.255.255.0
d.255.255.192.0
e.255.255.240.0
f.255.255.252.0
g.255.255.255.192
h.255.255.255.240
4. Which of the following subnet masks let a Class A network allow subnets to have up to
150 hosts and up to 164 subnets?
a.255.0.0.0
b.255.255.0.0
c.255.255.255.0
d.255.255.192.0
e.255.255.240.0
f.255.255.252.0
g.255.255.255.192
h.255.255.255.240
5. Which of the following are valid Class C IP addresses?
a. 1.1.1.1
b. 200.1.1.1
c. 128.128.128.128
d. 224.1.1.1
e. 223.223.223.255
6. What is the range for the values of the first octet for Class A IP networks?
a. 0 to 127
b. 0 to 126
c. 1 to 127
d. 1 to 126
e. 128 to 191
f. 128 to 192
7. How many valid host IP addresses does each Class C network contain?
a. 65,536
b. 65,534
c. 65,532
d. 32,768
e. 32,766
f. 256
g. 254
8. What valid host range is the IP address 172.16.10.22 255.255.255.240 a part of?
A. 172.16.10.20 through 172.16.10.22
B. 172.16.10.1 through 172.16.10.255
C. 172.16.10.16 through 172.16.10.23
D. 172.16.10.17 through 172.16.10.31
E. 172.16.10.17 through 172.16.10.30
9. What is the broadcast address of the subnet address 172.16.8.159 255.255.255.192?
A. 172.16.255.255
B. 172.16.8.127
C. 172.16.8.191
D. 172.16.8.255
10. What is the broadcast address of the subnet address 192.168.10.33 255.255.255.248?
A. 192.168.10.40
B. 192.168.10.255
C. 192.168.255.255
D. 192.168.10.39
11. If you wanted to have 12 subnets with a Class C network ID, which subnet mask would you use?
A. 255.255.255.252
B. 255.255.255.248
C. 255.255.255.240
D. 255.255.255.255
12. If you need to have a Class B network address subnetted into exactly 510 subnets, what subnet
mask would you assign?
A. 255.255.255.252
B. 255.255.255.128
C. 255.255.255.0
D. 255.255.255.192
13. If you are using a Class C network ID with two subnets and need 31 hosts per network, which
of the following masks should you use?
A. 255.255.255.0
B. 255.255.255.192
C. 255.255.255.224
D. 255.255.255.248
14. How many subnets and hosts can you get from the network 192.168.254.0/26?
A. 4 networks with 64 hosts
B. 2 networks with 62 hosts
C. 254 networks with 254 hosts
D. 1 network with 254 hosts
15. Write the subnet, broadcast address, and valid host range for each of the following:
a. 172.16.10.5 255.255.255.128
b. 172.16.10.33 255.255.255.224
c. 172.16.10.65 255.255.255.192
d. 172.16.10.17 255.255.255.252
e. 172.16.10.33 255.255.255.240
f. 192.168.100.25 255.255.255.252
g. 192.168.100.37 255.255.255.248
h. 192.168.100.66 255.255.255.224
i. 192.168.100.17 255.255.255.248
j. 10.10.10.5 255.255.255.252

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