alt.certification.mcse

Author

subnetting

Sorahl

2003-11-24, 11:25 am

Hey all,

The subject of TCP/IP subnetting befuddles me a bit.

I have given myself the example scenario of a small company with a C-class
network ID of 212.78.160.0.
They need 10 subnets.

If I correctly understand this, encoding 11 (10+1) into binary needs 4 bits.
Therefore, I use 4 bits more for the network ID and get a subnetmaks of
255.255.255.240.

The lowest bit in 11110000 is worth 16 so I get a multiplier of 16.

Subnets are then defined as follows:
212.78.160.16
212.78.160.32... right on till
212.78.160.224 as the 14th subnet.

Each subnet allows for 14 hosts.

Sounds okay up till now?

My question is what the ranges of valid IP host addresses look like.

Greets, Maarten

Trial News

2003-11-27, 8:25 pm

Dude,

I have to admit:, I cheated and got this tool on-line.

IP Network Table
Date: 27.11.03 18:47
14 Networks with subnet mask 255.255.255.240
Generated by peko IP Calculator Professional V1.1

Base Address Subnet Mask First Host Last Host Broadcast
212.78.160.0 255.255.255.240 212.78.160.1 212.78.160.14 212.78.160.15
212.78.160.16 255.255.255.240 212.78.160.17 212.78.160.30
212.78.160.31
212.78.160.32 255.255.255.240 212.78.160.33 212.78.160.46
212.78.160.47
212.78.160.48 255.255.255.240 212.78.160.49 212.78.160.62
212.78.160.63
212.78.160.64 255.255.255.240 212.78.160.65 212.78.160.78
212.78.160.79
212.78.160.80 255.255.255.240 212.78.160.81 212.78.160.94
212.78.160.95
212.78.160.96 255.255.255.240 212.78.160.97 212.78.160.110
212.78.160.111
212.78.160.112 255.255.255.240 212.78.160.113 212.78.160.126
212.78.160.127
212.78.160.128 255.255.255.240 212.78.160.129 212.78.160.142
212.78.160.143
212.78.160.144 255.255.255.240 212.78.160.145 212.78.160.158
212.78.160.159
212.78.160.160 255.255.255.240 212.78.160.161 212.78.160.174
212.78.160.175
212.78.160.176 255.255.255.240 212.78.160.177 212.78.160.190
212.78.160.191
212.78.160.192 255.255.255.240 212.78.160.193 212.78.160.206
212.78.160.207
212.78.160.208 255.255.255.240 212.78.160.209 212.78.160.222
212.78.160.223

I hope this helps,
Reggie.

"Sorahl" <Maarten@vandenDriest.com> wrote in message
news:3fc2299f$0$1492$e4fe514c@
news.xs4all.nl...
> Hey all,
>
> The subject of TCP/IP subnetting befuddles me a bit.
>
> I have given myself the example scenario of a small company with a C-class
> network ID of 212.78.160.0.
> They need 10 subnets.
>
> If I correctly understand this, encoding 11 (10+1) into binary needs 4
bits.
> Therefore, I use 4 bits more for the network ID and get a subnetmaks of
> 255.255.255.240.
>
> The lowest bit in 11110000 is worth 16 so I get a multiplier of 16.
>
> Subnets are then defined as follows:
> 212.78.160.16
> 212.78.160.32... right on till
> 212.78.160.224 as the 14th subnet.
>
> Each subnet allows for 14 hosts.
>
> Sounds okay up till now?
>
> My question is what the ranges of valid IP host addresses look like.
>
> Greets, Maarten
>
>

Trial News

2003-11-27, 8:25 pm

First Host Last Host
212.78.160.1 212.78.160.14
212.78.160.17 212.78.160.30
212.78.160.33 212.78.160.46
212.78.160.49 212.78.160.62
212.78.160.65 212.78.160.78
212.78.160.81 212.78.160.94
212.78.160.97 212.78.160.110
212.78.160.113 212.78.160.126
212.78.160.129 212.78.160.142
212.78.160.145 212.78.160.158
212.78.160.161 212.78.160.174
212.78.160.177 212.78.160.190
212.78.160.193 212.78.160.206
212.78.160.209 212.78.160.222

"Trial News" <rfrancoi@peoplepc.com> wrote in message
news:vsd6hc17hmfuc7@corp.supernews.com...
> Dude,
>
> I have to admit:, I cheated and got this tool on-line.
>
> IP Network Table
> Date: 27.11.03 18:47
> 14 Networks with subnet mask 255.255.255.240
> Generated by peko IP Calculator Professional V1.1
>
> Base Address Subnet Mask First Host Last Host Broadcast
> 212.78.160.0 255.255.255.240 212.78.160.1 212.78.160.14
212.78.160.15
> 212.78.160.16 255.255.255.240 212.78.160.17 212.78.160.30
> 212.78.160.31
> 212.78.160.32 255.255.255.240 212.78.160.33 212.78.160.46
> 212.78.160.47
> 212.78.160.48 255.255.255.240 212.78.160.49 212.78.160.62
> 212.78.160.63
> 212.78.160.64 255.255.255.240 212.78.160.65 212.78.160.78
> 212.78.160.79
> 212.78.160.80 255.255.255.240 212.78.160.81 212.78.160.94
> 212.78.160.95
> 212.78.160.96 255.255.255.240 212.78.160.97 212.78.160.110
> 212.78.160.111
> 212.78.160.112 255.255.255.240 212.78.160.113 212.78.160.126
> 212.78.160.127
> 212.78.160.128 255.255.255.240 212.78.160.129 212.78.160.142
> 212.78.160.143
> 212.78.160.144 255.255.255.240 212.78.160.145 212.78.160.158
> 212.78.160.159
> 212.78.160.160 255.255.255.240 212.78.160.161 212.78.160.174
> 212.78.160.175
> 212.78.160.176 255.255.255.240 212.78.160.177 212.78.160.190
> 212.78.160.191
> 212.78.160.192 255.255.255.240 212.78.160.193 212.78.160.206
> 212.78.160.207
> 212.78.160.208 255.255.255.240 212.78.160.209 212.78.160.222
> 212.78.160.223
>
>
> I hope this helps,
> Reggie.
>
>
>
>
>
> "Sorahl" <Maarten@vandenDriest.com> wrote in message
> news:3fc2299f$0$1492$e4fe514c@
news.xs4all.nl...
C-class[color=blue]
> bits.
>
>

Sponsored Links