Questions and Answers
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?
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Which statements are true regarding the subnet IDs for network 172.30.0.0/22? (Choose two)
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Which of the following are valid subnet IDs for network 192.168.9.0, using mask /29?
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Which of the following is not a valid subnet ID for network 172.19.0.0, using mask /24?
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Which of the following is not a valid subnet ID for network 10.0.0.0, using mask /25?
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A subnet mask begins with all binary 1s, followed by all binary 0s, with no interleaving of 1s and 0s.
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What is the three-step process to find all prefix masks that meet certain requirements?
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List the reasons to choose one subnet mask versus another.
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What is the complete process for finding and choosing masks to meet certain requirements?
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Study Notes
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.
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Description
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.
