IP Addressing and Subnetting MCQs

Which of the following IP address classes is used for multicasting?

A) Class A
B) Class B
C) Class C
D) Class D
Answer: D
How many bits are used for the network portion in a Class B IP address?

A) 8 bits
B) 16 bits
C) 24 bits
D) 32 bits
Answer: B
Which of the following is a valid IP address in Class C?

A) 192.168.10.1
B) 10.10.10.1
C) 172.16.10.1
D) 128.10.10.1
Answer: A
How many usable host addresses are available in a Class C network with subnet mask 255.255.255.240?

A) 14
B) 16
C) 30
D) 32
Answer: C
Which subnet mask is used for a Class B network to create 64 subnets?

A) 255.255.255.0
B) 255.255.248.0
C) 255.255.252.0
D) 255.255.255.192
Answer: B
What is the maximum number of hosts per subnet in a network using subnet mask 255.255.255.192?

A) 126
B) 128
C) 254
D) 256
Answer: A
Which of the following IP addresses is a loopback address?

A) 127.0.0.1
B) 192.168.0.1
C) 10.0.0.1
D) 172.16.0.1
Answer: A
How many bits are used for the host portion in a Class A network with default subnet mask 255.0.0.0?

A) 8 bits
B) 16 bits
C) 24 bits
D) 32 bits
Answer: C
Which of the following is a private IP address range?

A) 128.0.0.1 – 128.255.255.255
B) 172.16.0.0 – 172.31.255.255
C) 191.168.0.0 – 191.168.255.255
D) 200.0.0.1 – 200.255.255.255
Answer: B
What is the default subnet mask for a Class B network?

A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) 255.255.255.255
Answer: B
Which of the following IP address classes uses a 255.0.0.0 default subnet mask?

A) Class A
B) Class B
C) Class C
D) Class D
Answer: A
What is the network address of the IP address 192.168.10.25 with subnet mask 255.255.255.0?

A) 192.168.10.0
B) 192.168.0.0
C) 192.168.10.1
D) 192.168.0.1
Answer: A
How many bits are used for the host portion in a Class C network with subnet mask 255.255.255.224?

A) 5 bits
B) 6 bits
C) 7 bits
D) 8 bits
Answer: C
Which of the following is a valid IP address in Class B?

A) 172.16.10.1
B) 10.10.10.1
C) 192.168.10.1
D) 128.10.10.1
Answer: A
How many usable host addresses are available in a Class A network with subnet mask 255.0.0.0?

A) 16,777,214
B) 16,777,216
C) 8,388,606
D) 8,388,608
Answer: A
Which subnet mask would you use to create 8 subnets in a Class C network?

A) 255.255.255.240
B) 255.255.255.248
C) 255.255.255.252
D) 255.255.255.254
Answer: B
How many bits are borrowed for subnetting in a network using subnet mask 255.255.255.240?

A) 2 bits
B) 4 bits
C) 6 bits
D) 8 bits
Answer: B
What is the broadcast address for the IP address 192.168.1.10 with subnet mask 255.255.255.240?

A) 192.168.1.15
B) 192.168.1.16
C) 192.168.1.31
D) 192.168.1.255
Answer: C
Which of the following is a valid IP address in Class A?

A) 10.10.10.1
B) 172.16.10.1
C) 192.168.10.1
D) 128.10.10.1
Answer: D
How many bits are used for the network portion in a Class C IP address?

A) 8 bits
B) 16 bits
C) 24 bits
D) 32 bits
Answer: C
Which of the following is a private IP address range?

A) 128.0.0.1 – 128.255.255.255
B) 172.16.0.0 – 172.31.255.255
C) 191.168.0.0 – 191.168.255.255
D) 200.0.0.1 – 200.255.255.255
Answer: B
What is the maximum number of hosts per subnet in a network using subnet mask 255.255.255.224?

A) 30
B) 32
C) 62
D) 64
Answer: C
Which subnet mask is used for a Class B network to create 128 subnets?

A) 255.255.255.0
B) 255.255.254.0
C) 255.255.252.0
D) 255.255.255.128
Answer: B
How many bits are used for the host portion in a Class A network with default subnet mask 255.0.0.0?

A) 8 bits
B) 16 bits
C) 24 bits
D) 32 bits
Answer: C
Which of the following IP address classes allows for the most hosts per network?

A) Class A
B) Class B
C) Class C
D) Class D
Answer: A
What is the default subnet mask for a Class C network?

A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) 255.255.255.255
Answer: C
Which of the following IP addresses is a loopback address?

A) 127.0.0.1
B) 192.168.0.1
C) 10.0.0.1
D) 172.16.0.1
Answer: A
How many bits are used for the host portion in a Class B network with subnet mask 255.255.248.0?

A) 8 bits
B) 10 bits
C) 14 bits
D) 16 bits
Answer: C
Which of the following is a private IP address range?

A) 128.0.0.1 – 128.255.255.255
B) 172.16.0.0 – 172.31.255.255
C) 191.168.0.0 – 191.168.255.255
D) 200.0.0.1 – 200.255.255.255
Answer: B
How many usable host addresses are available in a Class B network with subnet mask 255.255.240.0?

A) 4094
B) 4096
C) 8190
D) 8192
Answer: A
Which subnet mask would you use to create 4 subnets in a Class A network?

A) 255.0.0.0
B) 255.255.0.0
C) 255.255.255.0
D) 255.255.255.255
Answer: B
How many bits are borrowed for subnetting in a network using subnet mask 255.255.255.224?