Q. How many bits are used for the host portion in a /22 subnet?
Solution
In a /22 subnet, 10 bits are used for the host portion (32 total bits - 22 bits for the network = 10 bits for hosts).
Correct Answer:
A
— 10
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Q. How many usable hosts are available in a subnet with a /28 prefix?
Solution
A /28 subnet has 16 total addresses, but 2 are reserved (network and broadcast), leaving 14 usable host addresses.
Correct Answer:
A
— 14
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Q. In CIDR notation, what does a /24 subnet mask represent?
-
A.
255.255.255.0
-
B.
255.255.0.0
-
C.
255.0.0.0
-
D.
255.255.255.255
Solution
A /24 subnet mask corresponds to 255.255.255.0, allowing for 256 IP addresses in the subnet.
Correct Answer:
A
— 255.255.255.0
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Q. What is the maximum number of hosts that can be addressed in a subnet with a /26 subnet mask?
Solution
A /26 subnet mask allows for 64 total addresses, of which 62 can be assigned to hosts (2 addresses are reserved for network and broadcast).
Correct Answer:
A
— 62
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Q. What is the maximum number of subnets that can be created from a Class B network with a /22 subnet mask?
Solution
A /22 subnet mask allows for 2^(22-16) = 2^6 = 64 subnets from a Class B network.
Correct Answer:
C
— 64
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Q. Which of the following IP addresses is a private IP address?
-
A.
192.168.1.1
-
B.
172.16.0.1
-
C.
10.0.0.1
-
D.
All of the above
Solution
All listed IP addresses are private IP addresses as defined by RFC 1918.
Correct Answer:
D
— All of the above
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Q. Which of the following is NOT a valid Class A IP address?
-
A.
10.0.0.1
-
B.
127.0.0.1
-
C.
192.168.1.1
-
D.
100.100.100.100
Solution
192.168.1.1 is a Class C IP address, while the others are Class A addresses.
Correct Answer:
C
— 192.168.1.1
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Q. Which protocol is used for dynamic IP address allocation?
-
A.
DHCP
-
B.
ARP
-
C.
ICMP
-
D.
RARP
Solution
DHCP (Dynamic Host Configuration Protocol) is used to dynamically allocate IP addresses to devices on a network.
Correct Answer:
A
— DHCP
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