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IP address range
Hi,
I am currently looking at setting up my own small office. I have been sent my network details by the building management company:
DHCP addresses: 10.8.38.194-10.8.38.195
Local Network: 10.8.38.192/28
Netmask: 255.255.255.240
Gateway IP: 10.8.38.193
DNS: 90.152.1.130
The management company has informed me i have 2 dhcp addresses and up to 13 additional IPs.
Looking at the above IP details, would i simply use 10.8.38.195 upwards? Im slightly confused by the 'Local Network address'. All other details im fine with.
The management company IT guy is away on holiday and i could do with getting up and running.
Many Thanks
I am currently looking at setting up my own small office. I have been sent my network details by the building management company:
DHCP addresses: 10.8.38.194-10.8.38.195
Local Network: 10.8.38.192/28
Netmask: 255.255.255.240
Gateway IP: 10.8.38.193
DNS: 90.152.1.130
The management company has informed me i have 2 dhcp addresses and up to 13 additional IPs.
Looking at the above IP details, would i simply use 10.8.38.195 upwards? Im slightly confused by the 'Local Network address'. All other details im fine with.
The management company IT guy is away on holiday and i could do with getting up and running.
Many Thanks
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I make it 16 addresses, (10.8.38.192 through 10.8.38.207 inclusive) 2 of which are not available (first and last), leaving 14 for you to use.
193 is the gateway
194 and 195 are DHCP
You can use 196 through 206 inclusive for other (internal) machines.
To work it out, you have to think in bits.
The /28 means that you must match the first 28 out of 32 bits of the IP address.
An IP4 address is four numbers, 0 up to 255 each. 2^8 = 256, so those four numbers make 2^32 combinations (32 bits).
Yuo have to match the first 28 bits, and can vary the remaining 4 which is (in binary):
00001010000010000010011011 00 - 0000
00001010000010000010011011 00 - 1111
If you convert those to four sets of 8 bits, and convert those 8 bit numbers to decimals you get:
10.8.38.192
10.8.38.207
HTH,
Alan.
193 is the gateway
194 and 195 are DHCP
You can use 196 through 206 inclusive for other (internal) machines.
To work it out, you have to think in bits.
The /28 means that you must match the first 28 out of 32 bits of the IP address.
An IP4 address is four numbers, 0 up to 255 each. 2^8 = 256, so those four numbers make 2^32 combinations (32 bits).
Yuo have to match the first 28 bits, and can vary the remaining 4 which is (in binary):
00001010000010000010011011
00001010000010000010011011
If you convert those to four sets of 8 bits, and convert those 8 bit numbers to decimals you get:
10.8.38.192
10.8.38.207
HTH,
Alan.
ASKER
Thanks Guys. Seems very straight forward when explained.
http://www.aelius.com/njh/subnet_sheet.html