Solution

The correct answer is A-II, B-IV, C-I, D-III.

Key Points

• 190.10.75.250: This is a Class B IP address. Class B addresses range from 128.0.0.0 to 191.255.255.255.
• 230.41.10.20: This is a Class D IP address. Class D addresses range from 224.0.0.0 to 239.255.255.255 and are used for multicast.
• 242.9.20.80: This is a Class E IP address. Class E addresses range from 240.0.0.0 to 255.255.255.254 and are reserved for experimental purposes.
• 127.10.125.230: This is a Class A IP address. Specifically, it falls under the 127.x.x.x range, which is reserved for loopback testing.

Additional Information

• Classes of IP Addresses:
  • Class A: Supports a large number of hosts; ranges from 1.0.0.0 to 126.255.255.255 (127.x.x.x is reserved for loopback).
  • Class B: Supports medium-sized networks; ranges from 128.0.0.0 to 191.255.255.255.
  • Class C: Supports small networks; ranges from 192.0.0.0 to 223.255.255.255.
  • Class D: Reserved for multicast; ranges from 224.0.0.0 to 239.255.255.255.
  • Class E: Reserved for experimental purposes; ranges from 240.0.0.0 to 255.255.255.254.
• Special IP Addresses:
  • 127.0.0.1: Loopback address used for testing network configurations.
  • 255.255.255.255: Broadcast address used to send packets to all hosts on a network.
  • 0.0.0.0: Represents an unknown or unassigned IP address.
• Application of IP Address Classes:
  • Class A: Used by large organizations with extensive networks.
  • Class B: Used by medium-sized enterprises and universities.
  • Class C: Used by small businesses and private networks.
  • Class D: Used for multicast applications like video streaming.
  • Class E: Reserved for future use or research and development.