Questions and Answers
What is the block size of /25?
What is the block size of /26?
What is the block size of /27?
What is the block size of /28?
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What is the block size of /29?
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What is the block size of /30?
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How many hosts per network does /25 allow?
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How many hosts per network does /26 allow?
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How many hosts per network does /27 allow?
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How many hosts per network does /28 allow?
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How many hosts per network does /29 allow?
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How many hosts per network does /30 allow?
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What is the mask for 128?
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What is the mask for 192?
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What is the mask for 224?
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What is the mask for 240?
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What is the mask for 248?
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What is the mask for 252?
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How many subnets does /25 create?
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How many subnets does /26 create?
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How many subnets does /27 create?
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How many subnets does /28 create?
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How many subnets does /29 create?
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How many subnets does /30 create?
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Identify the following details: 16 nets, mask of 240, block size - 16, hosts - 14.
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Study Notes
Class C Subnetting Overview
- Class C subnetting allows for division of networks into smaller subnets to optimize IP address usage.
- Each subnet is defined by a prefix length indicated by the CIDR notation (e.g., /25, /26).
Block Sizes and Corresponding CIDR
- Block size of 128 corresponds to a subnet mask of /25.
- Block size of 64 corresponds to a subnet mask of /26.
- Block size of 32 corresponds to a subnet mask of /27.
- Block size of 16 corresponds to a subnet mask of /28.
- Block size of 8 corresponds to a subnet mask of /29.
- Block size of 4 corresponds to a subnet mask of /30.
Host Capacity per Subnet
- A /25 subnet supports 126+ hosts.
- A /26 subnet supports 62+ hosts.
- A /27 subnet supports 30+ hosts.
- A /28 subnet supports 14+ hosts.
- A /29 subnet supports 6+ hosts.
- A /30 subnet supports 2+ hosts.
Subnet Masks Associated with Block Sizes
- A block size of 128 has a mask of /25.
- A block size of 64 has a mask of /26.
- A block size of 32 has a mask of /27.
- A block size of 16 has a mask of /28.
- A block size of 8 has a mask of /29.
- A block size of 4 has a mask of /30.
Subnets Created by Each CIDR Notation
- A /25 subnet creates 2 subnets.
- A /26 subnet creates 4 subnets.
- A /27 subnet creates 8 subnets.
- A /28 subnet creates 16 subnets.
- A /29 subnet creates 32 subnets.
- A /30 subnet creates 64 subnets.
Specific Subnet Characteristics
- A subnet with a mask of 240 (/28) allows for 16 networks and provides 14 usable hosts.
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Description
Test your knowledge of Class C subnetting with these flashcards. Each card presents a block size and its corresponding subnet mask. This quiz will help you understand the relationship between subnet sizes and the number of hosts.
