F5F Stay Refreshed Power Users Networks what are /30 /29....?

what are /30 /29....?

what are /30 /29....?

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Pollerino
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11-10-2016, 03:49 PM
#1
i) Those items colored red are the components we’re looking at.
ii) He understands that having four and eight IP addresses indicates specific configurations, though these values aren’t fixed standards—they can change based on network settings or calculations when IPs update.
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Pollerino
11-10-2016, 03:49 PM #1

i) Those items colored red are the components we’re looking at.
ii) He understands that having four and eight IP addresses indicates specific configurations, though these values aren’t fixed standards—they can change based on network settings or calculations when IPs update.

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plumhead123
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11-12-2016, 11:27 PM
#2
They are referred to as CIDR, a concise notation for specifying the subnet mask.
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plumhead123
11-12-2016, 11:27 PM #2

They are referred to as CIDR, a concise notation for specifying the subnet mask.

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Puppypower48
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11-13-2016, 07:46 AM
#3
They represent a compact way to describe a subnet mask. Writing 255.255.255.0 repeatedly can be cumbersome. Instead, using /24 simplifies things. Your subnet mask functions like a bit pattern. If you convert 255.255.255.0 into binary, it becomes 11111111.11111111.11111111.00000000, which equals 24 ones—hence /24. Choosing 255.255.255.252 would translate to 11111111.11111111.11111111.11111100, representing 30 ones (/30). This explains why a /30 subnet allows four IP addresses: each bit in the mask determines whether it’s fixed or adjustable. With the last octet holding 8 bits, there are 2^8 = 256 possible values, giving you 255 unique addresses. IPs matching the fixed portion of your address belong to one network, while those differing fall outside. For instance, 192.168.1.25 fits within your network, whereas 192.168.2.1 does not.
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Puppypower48
11-13-2016, 07:46 AM #3

They represent a compact way to describe a subnet mask. Writing 255.255.255.0 repeatedly can be cumbersome. Instead, using /24 simplifies things. Your subnet mask functions like a bit pattern. If you convert 255.255.255.0 into binary, it becomes 11111111.11111111.11111111.00000000, which equals 24 ones—hence /24. Choosing 255.255.255.252 would translate to 11111111.11111111.11111111.11111100, representing 30 ones (/30). This explains why a /30 subnet allows four IP addresses: each bit in the mask determines whether it’s fixed or adjustable. With the last octet holding 8 bits, there are 2^8 = 256 possible values, giving you 255 unique addresses. IPs matching the fixed portion of your address belong to one network, while those differing fall outside. For instance, 192.168.1.25 fits within your network, whereas 192.168.2.1 does not.

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