IP Addresses - Quiz Explanation

The correct answers are indicated below, along with text that explains the correct answers.
 
1. What are the two parts of an IP address?
Please select the best answer.
  A. The loopback address and the first configured interface
  B. The host address and the network address
  C. The broadcast address and the host address
  D. The loopback address and the network address
  The correct answer is B.
The two parts of an IP address are the host address and the network address. This division simplifies routing because the routing machine can decide where to send information based on the network part of the address.

2. What is the first-byte range for a Class C address?
Please select the best answer.
  A. 0 through 127
  B. 128 through 191
  C. 192 through 222
  D. 223 through 255
  The correct answer is C.
The first-byte range for a Class C address is 192 through 222. 0 through 127 are for Class A addresses; 128 through 191 are for Class B addresses; and 223 through 255 are reserved.

3. What class of network would the address 131.133.243.12 signify?
Please select the best answer.
  A. Class A
  B. Class B
  C. Class C
  D. Reserved
  The correct answer is B.
The address 131.133.243.12 signifies a Class B address, because the first byte falls into the 128 through 191 range.