Questions and Answers
What does CIDR stand for?
Classless Inter Domain Routing
CIDR Notation is another way of displaying a ___________.
Subnet Mask
What is the subnet mask for /8?
255.0.0.0
What is the subnet mask for /16?
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What is the subnet mask for /24?
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Is /32 a possible CIDR value?
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How many 1's are in /16?
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Why use CIDR notation?
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Subnet masks go from right to left.
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What do we know if a CIDR value is divisible by 8?
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The IPv4 address worksheet looks like?
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What is the value of an octet with all 8 bits set to 1?
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What is the value of an octet with all 8 bits set to 0?
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What is the subnet mask for /12?
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What is CIDR Syntax?
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What is the valid range of values for CIDR notation?
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What does VLSM stand for?
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To what does /N refer?
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The routing mask was traditionally called?
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192.168.100.14/24 represents?
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Study Notes
CIDR Overview
- CIDR stands for Classless Inter Domain Routing.
- CIDR notation is an alternative representation for subnet masks.
- It simplifies subnetting by providing a concise way to indicate the size of a network.
CIDR Notation and Subnet Masks
- The subnet mask for /8 is 255.0.0.0.
- The subnet mask for /16 is 255.255.0.0.
- The subnet mask for /24 is 255.255.255.0.
- /32 is not a valid CIDR value since it equates to a subnet mask of 255.255.255.255.
Binary Representation
- A CIDR value of /16 indicates there are 16 leading 1's in the subnet mask.
- Each octet, with all bits set to 1, has a value of 255; with all bits set to 0, the value is 0.
- The IPv4 address worksheet is represented as: 128|64|32|16|8|4|2|1.
CIDR and Subnetting Benefits
- CIDR notation serves as a shorthand to simplify subnetting processes.
- Subnet masks are always read from left to right, not right to left.
- CIDR values divisible by 8 correspond to specific subnet masks:
- /8: 255.0.0.0
- /16: 255.255.0.0
- /24: 255.255.255.0.
VLSM and Routing Masks
- VLSM stands for Variable-Length Subnet Masking, which allows for more efficient IP address space utilization.
- The /N in CIDR refers to the number of leading 1 bits in the subnet mask used for routing.
- The traditional term for the routing mask is network mask.
Address Representation
- An IPv4 address like 192.168.100.14/24 represents the routing prefix 192.168.100.0 with a subnet mask of 255.255.255.0.
- The valid range for CIDR notation is from /1 to /31.
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Description
Test your understanding of CIDR notation and subnet masks with this quiz. You'll learn the meanings behind CIDR values and associated definitions. Perfect for networking students or professionals looking to refresh their knowledge!
