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Check your speedWhatmask runs in a DOS shell (Command Prompt). <br>Whatmask is a small C program that will help you with network settings. <br> Whatmask can work in two modes. The first mode (which is how prior versions worked) is to invoke Whatmask with only a subnet mask as the argument. In this mode Whatmask will echo back the subnet mask in three formats, plus the number of useable addresses in the range. <br> Netmask Notations supported: <PRE> Name Example --------------------------------- CIDR /24 Netmask 255.255.255.0 Wilcard Bits 0.0.0.255 </PRE> The above notations are all identical. CIDR notation commonly has a "/" in front of the number (representing the number of bits). Whatmask can accept these notations with or without a slash. This notation is used more and more recently. A lot of popular routers and software support this notation. <br> Netmask notation is pretty much the standard old-school way of doing it. It is supported by most systems (Un*x, Win, Mac, etc.). <br> Wilcard bits are similar to the netmask, but they are the logical not of the netmask. This notation is used by a number of popular routers (and nobody knows why...). <br> To use Whatmask in the original mode simply type "whatmask <notation>" The notation can be in any of the three formats and Whatmask will automagically figure out what it is and display all three notations. <br> To find out more about subnets and netmasks see the References section below. <br> To use Whatmask in its second mode execute Whatmask with any ip address within the subnet, followed by a slash ('/'), followed by the subnet mask in any format. (e.g. 192.168.0.23/255.255.255.224, or 192.168.0.23/27) <br> Whatmask will echo back the following: <UL> <LI> The netmask in the following formats: CIDR, Netmask, Wildcard Bits <LI> The Network Address <LI> The Broadcast Address <LI> The number of Usable IP Addresses <LI> The First Usable IP Address <LI> The Last Usable IP Address </UL> (Whatnet assumes that the Broadcast address is the highest address in the subnet. This is the most common configuration.)
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