Subnetting Flashcards
Q: IPv4 address is how many bits long?
A: 32 bits
Q: IPv4 address is how many octets long?
A: 4 octets
Q: IPv4 address is how many bytes long?
A: 4 bytes (1 byte = 8 bits)
Q: How long is the network portion for a Class A address?
A: 1 octet (1 byte or 8 bits)
Q: How long is the network portion for a Class B address?
A :2 octets (2 bytes or 16 bits)
Q: How long is the network portion for a Class C address?
A: 3 octets (3 bytes or 24 bits)
Q: What is the leading bit(s) for a Class A address?
A: Leftmost bit is 0
Q: What is the leading bit(s) for a Class B address?
A: Leftmost 2 bits are 10
Q: What is the leading bit(s) for a Class C address?
A: Leftmost 3 bits are 110
Q: How many Class A network addresses are there?
A: 128
Q: How many Class A hosts addresses are there per network?
A: 16,777,214
Q: How many Class B network addresses are there?
A: 16,384
Q: How many Class B hosts addresses are there per network?
A: 65,534
Q: How many Class C network addresses are there?
A: 2,097,152
Q: How many Class C hosts addresses are there per network?
A: 254
Q: How many usable network bits in Class A?
A: 7 bits
(Note: 8 - 1 reserved bit = 7)
Q: How many usable network bits in Class B?
A: 14 bits
(Note: 16 - 2 reserved bits = 14)
Q: How many usable network bits in Class C?
A: 21 bits
(Note: 24 - 3 reserved bits = 21)
Q: What is the network address range for Class A?
A: 1.0.0.0 - 126.0.0.0
Note: 0.0.0.0 and 127.0.0.0 are reserved
Q: What is the network address range for Class B?
A: 128.0.0.0 - 191.255.0.0
Q: What is the network address range for Class C?
A: 192.0.0.0 - 223.255.255.0
Q: What is the private address range for Class A?
A: 10.0.0.0 - 10.255.255.255
Note: 10.255.255.255 is a broadcast address
Q: What is the private address range for Class B?
A: 172.16.0.0 - 172.31.255.255
Note: 172.31.255.255 is a broadcast address
Q: What is the private address range for Class C?
A: 192.168.0.0 - 192.168.255.255
Note: 192.168.255.255 is a broadcast address
