Subnetting

Question 1

Q: IPv4 address is how many bits long?

Answer 1

A: 32 bits

Question 2

Q: IPv4 address is how many octets long?

Answer 2

A: 4 octets

Question 3

Q: IPv4 address is how many bytes long?

Answer 3

A: 4 bytes (1 byte = 8 bits)

Question 4

Q: How long is the network portion for a Class A address?

Answer 4

A: 1 octet (1 byte or 8 bits)

Question 5

Q: How long is the network portion for a Class B address?

Answer 5

A :2 octets (2 bytes or 16 bits)

Question 6

Q: How long is the network portion for a Class C address?

Answer 6

A: 3 octets (3 bytes or 24 bits)

Question 7

Q: What is the leading bit(s) for a Class A address?

Answer 7

A: Leftmost bit is 0

Question 8

Q: What is the leading bit(s) for a Class B address?

Answer 8

A: Leftmost 2 bits are 10

Question 9

Q: What is the leading bit(s) for a Class C address?

Answer 9

A: Leftmost 3 bits are 110

Question 10

Q: How many Class A network addresses are there?

Answer 10

A: 128

Question 11

Q: How many Class A hosts addresses are there per network?

Answer 11

A: 16,777,214

Question 12

Q: How many Class B network addresses are there?

Answer 12

A: 16,384

Question 13

Q: How many Class B hosts addresses are there per network?

Answer 13

A: 65,534

Question 14

Q: How many Class C network addresses are there?

Answer 14

A: 2,097,152

Question 15

Q: How many Class C hosts addresses are there per network?

Answer 15

A: 254

Question 16

Q: How many usable network bits in Class A?

Answer 16

A: 7 bits
(Note: 8 - 1 reserved bit = 7)

Question 17

Q: How many usable network bits in Class B?

Answer 17

A: 14 bits
(Note: 16 - 2 reserved bits = 14)

Question 18

Q: How many usable network bits in Class C?

Answer 18

A: 21 bits
(Note: 24 - 3 reserved bits = 21)

Question 19

Q: What is the network address range for Class A?

Answer 19

A: 1.0.0.0 - 126.0.0.0

Note: 0.0.0.0 and 127.0.0.0 are reserved

Question 20

Q: What is the network address range for Class B?

Answer 20

A: 128.0.0.0 - 191.255.0.0

Question 21

Q: What is the network address range for Class C?

Answer 21

A: 192.0.0.0 - 223.255.255.0

Question 22

Q: What is the private address range for Class A?

Answer 22

A: 10.0.0.0 - 10.255.255.255

Note: 10.255.255.255 is a broadcast address

Question 23

Q: What is the private address range for Class B?

Answer 23

A: 172.16.0.0 - 172.31.255.255

Note: 172.31.255.255 is a broadcast address

Question 24

Q: What is the private address range for Class C?

Answer 24

A: 192.168.0.0 - 192.168.255.255

Note: 192.168.255.255 is a broadcast address