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Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?
- a)Router(config)#ip classless
- b)Router(config)#no ip classful
- c)Router(config)#ip unnumbered
- d)Router(config)#ip subnet-zero
Correct answer is option 'D'. Can you explain this answer?
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Which configuration command must be in effect to allow the use of 8 su...
A Class C subnet mask of 255.255.255.224 is 3 bits on and 5 bits off (11100000) and provides 8 subnets, each with 30 hosts. However, if the command ip subnet-zero is not used, then only 6 subnets would be available for use.
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Which configuration command must be in effect to allow the use of 8 su...
Understanding Class C Subnetting
In a Class C network with a default subnet mask of 255.255.255.0, subnetting allows for the creation of smaller networks. When you use a subnet mask of 255.255.255.224, you are effectively borrowing bits from the host part to create subnets.
Subnetting with 255.255.255.224
- The subnet mask 255.255.255.224 (or /27) provides 3 bits for subnetting.
- This allows for 2^3 = 8 possible subnets.
Importance of the Configuration Command
To utilize all available subnets, including the first and last subnets, the command needed is:
Router(config)#ip subnet-zero
- This command enables the use of the first subnet (subnet zero) and the last subnet, which are traditionally not used in older networking practices.
Other Options Explained
- Router(config)#ip classless: This command allows for the use of variable-length subnet masking (VLSM) but does not specifically enable the use of subnet zero.
- Router(config)#no ip classful: This command allows for classless routing, but does not directly relate to the use of subnet zero.
- Router(config)#ip unnumbered: This command is used to configure interfaces without assigning a unique IP address, which is not relevant to enabling subnets.
Conclusion
To effectively use all 8 subnets available with a Class C subnet mask of 255.255.255.224, the command ip subnet-zero must be configured on the router. This ensures that both the first and last subnets can be utilized in your network design.
In a Class C network with a default subnet mask of 255.255.255.0, subnetting allows for the creation of smaller networks. When you use a subnet mask of 255.255.255.224, you are effectively borrowing bits from the host part to create subnets.
Subnetting with 255.255.255.224
- The subnet mask 255.255.255.224 (or /27) provides 3 bits for subnetting.
- This allows for 2^3 = 8 possible subnets.
Importance of the Configuration Command
To utilize all available subnets, including the first and last subnets, the command needed is:
Router(config)#ip subnet-zero
- This command enables the use of the first subnet (subnet zero) and the last subnet, which are traditionally not used in older networking practices.
Other Options Explained
- Router(config)#ip classless: This command allows for the use of variable-length subnet masking (VLSM) but does not specifically enable the use of subnet zero.
- Router(config)#no ip classful: This command allows for classless routing, but does not directly relate to the use of subnet zero.
- Router(config)#ip unnumbered: This command is used to configure interfaces without assigning a unique IP address, which is not relevant to enabling subnets.
Conclusion
To effectively use all 8 subnets available with a Class C subnet mask of 255.255.255.224, the command ip subnet-zero must be configured on the router. This ensures that both the first and last subnets can be utilized in your network design.
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Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?a)Router(config)#ip classlessb)Router(config)#no ip classfulc)Router(config)#ip unnumberedd)Router(config)#ip subnet-zeroCorrect answer is option 'D'. Can you explain this answer?
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Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?a)Router(config)#ip classlessb)Router(config)#no ip classfulc)Router(config)#ip unnumberedd)Router(config)#ip subnet-zeroCorrect answer is option 'D'. Can you explain this answer? for Quant 2024 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?a)Router(config)#ip classlessb)Router(config)#no ip classfulc)Router(config)#ip unnumberedd)Router(config)#ip subnet-zeroCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Quant 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?a)Router(config)#ip classlessb)Router(config)#no ip classfulc)Router(config)#ip unnumberedd)Router(config)#ip subnet-zeroCorrect answer is option 'D'. Can you explain this answer?.
Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?a)Router(config)#ip classlessb)Router(config)#no ip classfulc)Router(config)#ip unnumberedd)Router(config)#ip subnet-zeroCorrect answer is option 'D'. Can you explain this answer? for Quant 2024 is part of Quant preparation. The Question and answers have been prepared according to the Quant exam syllabus. Information about Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?a)Router(config)#ip classlessb)Router(config)#no ip classfulc)Router(config)#ip unnumberedd)Router(config)#ip subnet-zeroCorrect answer is option 'D'. Can you explain this answer? covers all topics & solutions for Quant 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which configuration command must be in effect to allow the use of 8 subnets if the Class C subnet mask is 255.255.255.224?a)Router(config)#ip classlessb)Router(config)#no ip classfulc)Router(config)#ip unnumberedd)Router(config)#ip subnet-zeroCorrect answer is option 'D'. Can you explain this answer?.
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