0

New to networking and have been asked to setup a server. The colocation provider gave the following IP addresses:

Address block: xxx.xxx.xxx.225/28
Subnet mask: 255.255.255.240

The datacenter would only be putting in 1 network cable into the server.

Winker
  • 97
  • 1
  • 6
  • 2
    Lookup "online ip subnet calculators", or any of the dozens of "ip subnet calculator" or "CIDR calculator" apps available for most popular smartphone OS'es – fvu Aug 17 '17 at 18:04
  • 3
    Possible duplicate of [How does IPv4 Subnetting Work?](https://serverfault.com/questions/49765/how-does-ipv4-subnetting-work) – Zac67 Aug 17 '17 at 18:04

1 Answers1

2

Subnet address size of 28 leaves 4 bits for hosts. 2^4 minus two not usable addresses is 14. Usually, one of those is used for the ISP default gateway.

However, ...225/28 doesn't work since the host end bits are not 0000 but 0001. Possibly, this is the default gateway in the ...224/28 network.

Zac67
  • 8,639
  • 2
  • 10
  • 28