Which of the following IP class addresses are not allotted to hosts?Each correct answer represents a complete solution. Choose all that apply.

The correct answer is C. Class D D. Class E. Class D and Class E addresses are not allotted to hosts. Class D (224.0.0.0–239.255.255.255) is reserved exclusively for multicast group communication, where packets are sent to multiple recipients simultaneously - no individual host is assigned a Class D address. Class E…

Computer Network Defense Fundamentals

Question

Which of the following IP class addresses are not allotted to hosts?Each correct answer represents a complete solution. Choose all that apply.

Options

AClass A
BClass B
CClass D
DClass E
EClass C

How the community answered

(36 responses)

A
3% (1)
C
94% (34)
E
3% (1)

Explanation

Class D and Class E addresses are not allotted to hosts. Class D (224.0.0.0–239.255.255.255) is reserved exclusively for multicast group communication, where packets are sent to multiple recipients simultaneously - no individual host is assigned a Class D address. Class E (240.0.0.0–255.255.255.255) is reserved for experimental and research purposes and is similarly never assigned to hosts on production networks.

Classes A, B, and C (choices A, B, and E) are all host-assignable: Class A supports very large networks (up to ~16 million hosts), Class B supports medium networks (up to ~65,000 hosts), and Class C supports small networks (up to 254 hosts).

Memory tip: Think "D for Delivery to groups, E for Experiments" - neither goes to a regular host. The first three letters of the alphabet (A, B, C) cover normal host addressing; D and E are the "extras" with special reserved purposes.

Topics

#IPv4 classes#IP addressing#host allocation#multicast

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