SSCP · Question #1089
There are 5 classes of IP addresses available, but only 3 classes are in common use today, identify the three: (Choose three)
The correct answer is A. Class A: 1-126 B. Class B: 128-191 C. Class C: 192-223. The three classes of IPv4 addresses commonly used for assigning to hosts on networks are Class A, Class B, and Class C.
Question
There are 5 classes of IP addresses available, but only 3 classes are in common use today, identify the three: (Choose three)
Options
- AClass A: 1-126
- BClass B: 128-191
- CClass C: 192-223
- DClass D: 224-255
- EClass E: 0.0.0.0 - 127.0.0.1
How the community answered
(64 responses)- A91% (58)
- D3% (2)
- E6% (4)
Why each option
The three classes of IPv4 addresses commonly used for assigning to hosts on networks are Class A, Class B, and Class C.
Class A IP addresses are defined by a first octet range of 1-126 and are used for very large networks.
Class B IP addresses are defined by a first octet range of 128-191 and are typically used for medium-sized networks.
Class C IP addresses are defined by a first octet range of 192-223 and are generally used for smaller networks.
Class D addresses (224-239) are reserved exclusively for multicast communication and are not assigned to individual hosts or for general unicast use.
Class E addresses (240-255) are reserved for experimental or research purposes and are not publicly routable or used for general assignment; additionally, the listed range 0.0.0.0 - 127.0.0.1 incorrectly includes the Class A loopback network.
Concept tested: IPv4 address classes and ranges
Source: https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/16448-ipaddress.html
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