(ISC)2(ISC)2
SSCP · Question #1089
SSCP Question #1089: Real Exam Question with Answer & Explanation
The correct answer is A: Class A: 1-126. The three classes of IPv4 addresses commonly used for assigning to hosts on networks are Class A, Class B, and Class C.
Submitted by saadiq_pk· Apr 18, 2026Network and Communications Security
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
Explanation
The three classes of IPv4 addresses commonly used for assigning to hosts on networks are Class A, Class B, and Class C.
Common mistakes.
- D. Class D addresses (224-239) are reserved exclusively for multicast communication and are not assigned to individual hosts or for general unicast use.
- E. 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
Reference. https://www.cisco.com/c/en/us/support/docs/ip/routing-information-protocol-rip/16448-ipaddress.html
Topics
#IP Addressing#Network Protocols#TCP/IP#Networking Fundamentals
Community Discussion
No community discussion yet for this question.