Subnet Masking And Addressing

Subnet Masking And Addressing Ok, this explains subnet wreakressing which is useful if you run a scanner, a firewall, a router or anything else that is bound to IP subnet tag onressing. Note that this only describes IPv4 subnets. interpretation binary values Normally, you read binary numbers bytewise (8 musical composition wise). Start at the last bit, bit 0. If it is 1, rack up 2^0 to your number, else add 0. Then the next bit, bit 1, If it is 1, add 2^1 (2) to your number, If bit 3 is 1 add 2^2 (4) to your number, if bit 4 is 1 add 2^3 (8) to your number ... if bit 8 is 1 add 2^7 (128) to your number. You see, the base is always 2 because it can be either 0 or 1.

cause 1: 10100100 = 2^7+0+2^5+0+0+0+2^2+0+0 = 164 Example 2: 11111111 = 2^7+2^6+2^5+2^4+2^3+2^2+2^1+2^0 = 255 Thats it! Now to subnet addressing. When you state a host including a subnet (example: nmap), you do it like this: 1.2.3.4/24, where /24 is the subnet. Lets have a assure at what this means: an IP address is a 32 bit addr...If you want to get a full essay, army it on our website: Ordercustompaper.com

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