Subnet Design for Class B Networks

How many masks meet the requirements for the Class B network 172.23.0.0, needing 100 subnets and accommodating 50 percent growth?

Which private IP network and mask would meet the requirements of 200 subnets and 120 hosts/subnet?

Which subnet mask supplies the largest number of hosts per subnet while supporting 1000 subnets for Class B network 172.19.0.0?

Which mask for Class A network 10.0.0.0 meets the requirements for 1000 subnets and 200 hosts?

Which statements are true regarding the subnet IDs for network 172.30.0.0/22? (Choose two)

Which of the following are valid subnet IDs for network 192.168.9.0, using mask /29?

Which of the following is not a valid subnet ID for network 172.19.0.0, using mask /24?

Which of the following is not a valid subnet ID for network 10.0.0.0, using mask /25?

A subnet mask begins with all binary 1s, followed by all binary 0s, with no interleaving of 1s and 0s.

What is the three-step process to find all prefix masks that meet certain requirements?

List the reasons to choose one subnet mask versus another.

What is the complete process for finding and choosing masks to meet certain requirements?

Subnet Design Fundamentals

Class B network range: 172.23.0.0 used for subnetting, requiring 100 subnets and supporting 500 hosts, accommodating 50% growth.
Class A network 10.0.0.0 designated for subnetting, needing 1000 subnets and supporting 200 hosts, maximized with a /24 mask.

Subnet Masks and Requirements

A single subnet mask is mandated throughout each designated network.
172.19.0.0 network with /26 mask meets criteria for 1000 subnets, by borrowing 10 bits.

Growth Consideration in Network Design

Designs incorporate provisions for growth in the number of subnets and host capacities.
Private network examples with their corresponding subnet masks include:
- 10.0.0.0/22 fitting 200 subnets and enough hosts.

Validity of Subnet IDs

Subnet IDs are determined by following mask standards:
- For 172.30.0.0/22, valid IDs differ by 4 in the third octet, resulting in a total of 64 IDs.
- Valid subnet IDs for 192.168.9.0/29 include 192.168.9.144; invalid IDs are those not divisible by the block size.

Rules for Identifying Subnet IDs

Subnetting rules dictate that IDs must follow specific increments based on designated subnet masks.
Invalid subnet IDs signify misalignment with subnetting rules, e.g., 172.19.9.16 for /24 mask.

Subnet Mask Structure

Subnet masks must start with consecutive binary 1s followed by binary 0s; this ensures proper division of network components.

Process of Prefix Mask Determination

Three-step method to find valid prefix masks:
- Calculate the shortest prefix mask based on subnet requirements.
- Determine the longest prefix mask by calculating based on hosts.
- Identify valid mask range between the calculated prefix values.

Factors Influencing Subnet Mask Selection

Selecting subnet masks considers maximizing the number of hosts/subnets and optimizing network performance.

Comprehensive Steps for Mask Selection

Calculation of network bits, minimum hosts needed, and corresponding masks, followed by iteration through the defined ranges for optimal configurations.

Test your knowledge on subnet design strategies for Class B networks with this quiz. Focused on accommodating growth, it covers requirements for subnets and host capacities. Perfect for engineers and students studying networking concepts.

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Subnet Design for Class B Networks - Ch. 19

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