Original Poster Posted October 9, 2012 Share Posted October 9, 2012 Hi basically I learnt sub-netting 8 months ago... didnt touch it after I now have to do subnetting theory.... yay... and I have forgotten everything..... maybe help me out with a few examples ? one of the many things I have to do is this... 156.192.162.56/255.255.255.0 Address Class : __b__ Bits Borrowed for Subnet: ____8_____ Bits for Host: ____8_____ Number of Usable Subnets: _____253_____ Number of Usable Hosts/Subnet: _________ Network Address: ____________________ Usable Address Range: __________ Broadcast Address: ____________________ I have put in some numbers though I think I am extremely wrong..... can you help me with this one and explain then maybe I can do the rest my self? Link to comment Share on other sites More sharing options...
Teebor Posted October 9, 2012 Share Posted October 9, 2012 I would recommend going to networking-forum.com and looking on there as they have a good way to test yourself (one of the little links on the sidbar iirc) and also teaches you a good way to do it. Another way to learn to do it is :- http://www.subnetting-secrets.com/easy_way_to_subnet.html Or are you looking for more detail? Link to comment Share on other sites More sharing options...
Original Poster Posted October 9, 2012 Author Share Posted October 9, 2012 I would recommend going to networking-forum.com and looking on there as they have a good way to test yourself (one of the little links on the sidbar iirc) and also teaches you a good way to do it. Another way to learn to do it is :- http://www.subnettin..._to_subnet.html Or are you looking for more detail? yea I understand that but its not helping with everything on my work haha xD I am so bummed Link to comment Share on other sites More sharing options...
+BudMan MVC Posted October 9, 2012 MVC Share Posted October 9, 2012 so you want us to do your homework ;) Link to comment Share on other sites More sharing options...
trek Posted October 9, 2012 Share Posted October 9, 2012 Hi basically I learnt sub-netting 8 months ago... didnt touch it after I now have to do subnetting theory.... yay... and I have forgotten everything..... maybe help me out with a few examples ? one of the many things I have to do is this... 156.192.162.56/255.255.255.0 Address Class : __b__ Bits Borrowed for Subnet: ____8_____ Bits for Host: ____8_____ Number of Usable Subnets: _____253_____ Number of Usable Hosts/Subnet: _________ Network Address: ____________________ Usable Address Range: __________ Broadcast Address: ____________________ I have put in some numbers though I think I am extremely wrong..... can you help me with this one and explain then maybe I can do the rest my self? 156.192.162.56/255.255.255.0 Address Class : B Bits Borrowed for Subnet: Class B is a 16-bit mask, but the SN above is a /24 so you borrowed 8 bits Bits for Host: ____8_____ Number of Usable Subnets: 2^8 = 256 subnets Number of Usable Hosts/Subnet: 32 bit address - 24 bit subnet address for a /24 = 8 bits for hosts -> 2^8 - 2 = 254 hosts per subnet Network Address: 156.192.162.0/24 Usable Address Range: 156.192.162.0 to 156.192.162.254 Broadcast Address: 156.192.162.255 I'm pretty sure that's right... it's been a while since I passed my CCNA lol. Link to comment Share on other sites More sharing options...
Kami- Posted October 9, 2012 Share Posted October 9, 2012 so you want us to do your homework ;) This++ Link to comment Share on other sites More sharing options...
Original Poster Posted October 9, 2012 Author Share Posted October 9, 2012 156.192.162.56/255.255.255.0 Address Class : B Bits Borrowed for Subnet: Class B is a 16-bit mask, but the SN above is a /24 so you borrowed 8 bits Bits for Host: ____8_____ Number of Usable Subnets: 2^8 = 256 subnets Number of Usable Hosts/Subnet: 32 bit address - 24 bit subnet address for a /24 = 8 bits for hosts -> 2^8 - 2 = 254 hosts per subnet Network Address: 156.192.162.0/24 Usable Address Range: 156.192.162.0 to 156.192.162.254 Broadcast Address: 156.192.162.255 I'm pretty sure that's right... it's been a while since I passed my CCNA lol. 2^8 - 2 (the broadcast and the network address are not usable they are reserved ) but thanks for your help you confirmed most of my stuff also its 1 to 255 0 and 256 are the resevered (the first and last addresses ) Link to comment Share on other sites More sharing options...
giantsnyy Posted October 9, 2012 Share Posted October 9, 2012 2^8 - 2 (the broadcast and the network address are not usable they are reserved ) but thanks for your help you confirmed most of my stuff also its 1 to 255 0 and 256 are the resevered (the first and last addresses ) Actually it would be 1 to 254. 0 is reserved for the network, 255 is reserved for the broadcast. 256 doesn't exist. Link to comment Share on other sites More sharing options...
Original Poster Posted October 10, 2012 Author Share Posted October 10, 2012 Actually it would be 1 to 254. 0 is reserved for the network, 255 is reserved for the broadcast. 256 doesn't exist. ha! why did i type 256 xD I just went into binary me thinks Link to comment Share on other sites More sharing options...
pes2013 Posted October 12, 2012 Share Posted October 12, 2012 Actually it would be 1 to 254. 0 is reserved for the network, 255 is reserved for the broadcast. 256 doesn't exist. Incorrect. 256 is Chuck Norris. Link to comment Share on other sites More sharing options...
moloko Posted October 13, 2012 Share Posted October 13, 2012 Check out youtube. there are some great tutorials that have sped up my subnetting down to a minute or so. Link to comment Share on other sites More sharing options...
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