You have an IP address 10.0.0.1 and want to divide it into smaller networks. Which classful address and default subnet mask does it belong to, and how many hosts can each subnet support?

hard📝 Application Q15 of 15

Computer Networks - IP Addressing

You have an IP address 10.0.0.1 and want to divide it into smaller networks. Which classful address and default subnet mask does it belong to, and how many hosts can each subnet support?

AClass B, 255.255.0.0, supports about 65,000 hosts

BClass A, 255.0.0.0, supports about 16 million hosts

CClass C, 255.255.255.0, supports about 254 hosts

DClass D, no subnet mask, used for multicast

Step-by-Step Solution

Solution:

Step 1: Identify the class of IP 10.0.0.1
The first octet is 10, which falls in Class A (1-126).
Step 2: Recall default subnet mask and host count for Class A
Class A default mask is 255.0.0.0, allowing 2^24 - 2 = 16,777,214 hosts approximately.
Final Answer:
Class A, 255.0.0.0, supports about 16 million hosts -> Option B
Quick Check:
10 in 1-126 = Class A, hosts ≈ 16 million [OK]

Quick Trick: Class A IPs start 1-126, huge host capacity [OK]

Common Mistakes:

MISTAKES

Confusing Class A with Class B or C
Using wrong subnet mask for Class A
Miscounting number of hosts

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You have an IP address 10.0.0.1 and want to divide it into smaller networks. Which classful address and default subnet mask does it belong to, and how many hosts can each subnet support?

Step 1: Identify the class of IP 10.0.0.1

Step 2: Recall default subnet mask and host count for Class A

Final Answer:

Quick Check:

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