Discussion :: Networking - Section 5 (Q.No.40)
What is the first octet range for a class A IP address?
Answer: Option A
No answer description available for this question.
|Rathiga said: (Apr 12, 2014)|
|Class A networks have a beginning octet of 1 - 126.
Class B networks have a beginning octet of 128-191.
Class C networks have a beginning octet of 192 - 223.
Notice a number missing? 127 is the reserved first octet for loopback addresses, such as the 127.0.0.1 address assigned to a PC.
Class D networks are reserved for multicasting. Class D addresses begin with an octet in the 224 - 239 range.
Class E networks are reserved for "experimental use", and the first octet of these addresses is 240 - 255. Those addresses are reserved by the Internet Engineering Task Force (IETF). Neither Class D nor Class E networks should be assigned to host devices.
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