Class C Subnet Flashcards

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Questions and Answers

What is the block size of /25?

128 (correct)

What is the block size of /26?

64 (correct)

128

What is the block size of /27?

32 (correct)

128

What is the block size of /28?

16 Signup and view all the answers

What is the block size of /29?

8 Signup and view all the answers

What is the block size of /30?

4 Signup and view all the answers

How many hosts per network does /25 allow?

126+ Signup and view all the answers

How many hosts per network does /26 allow?

62+ Signup and view all the answers

How many hosts per network does /27 allow?

30+ Signup and view all the answers

How many hosts per network does /28 allow?

14+ Signup and view all the answers

How many hosts per network does /29 allow?

6+ Signup and view all the answers

How many hosts per network does /30 allow?

2+ Signup and view all the answers

What is the mask for 128?

/25 Signup and view all the answers

What is the mask for 192?

/26 Signup and view all the answers

What is the mask for 224?

/27 Signup and view all the answers

What is the mask for 240?

/28 Signup and view all the answers

What is the mask for 248?

/29 Signup and view all the answers

What is the mask for 252?

/30 Signup and view all the answers

How many subnets does /25 create?

2 Signup and view all the answers

How many subnets does /26 create?

4 Signup and view all the answers

How many subnets does /27 create?

8 Signup and view all the answers

How many subnets does /28 create?

16 Signup and view all the answers

How many subnets does /29 create?

32 Signup and view all the answers

How many subnets does /30 create?

64 Signup and view all the answers

Identify the following details: 16 nets, mask of 240, block size - 16, hosts - 14.

/28 Signup and view all the answers

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.