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? 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 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 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? 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