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netmask

   Also found in: Wikipedia 0.01 sec.
(networking)netmask - A 32-bit bit mask which shows how an Internet address is to be divided into network, subnet and host parts. The netmask has ones in the bit positions in the 32-bit address which are to be used for the network and subnet parts, and zeros for the host part. The mask should contain at least the standard network portion (as determined by the address's class), and the subnet field should be contiguous with the network portion.

If a `+' (plus sign) is given for the netmask value, then the network number is looked up in the NIS netmasks.byaddr map (or in the /etc/netmasks) file if not running the NIS service.

Unix manual page: ifconfig(8).


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People use a subnet mask to identify what specific part of an Internet Protocol address is allotted for the host as well as the particular area reserved for the network Also referred to as the netmask, this information is vital, as it is necessary to measure easily the specific parts for the host and the network People use a subnet mask to identify what specific part of an Internet Protocol address is allotted for the host as well as the particular area reserved for the network.
Administrators can check IP address on netmask, gateway/routers and domain servers, and access DHCP hosts to obtain network information.
While previous versions of the Barracuda Spyware Firewall included custom blocking rules for arbitrary URLs and MIME file types, the Barracuda Spyware Firewall now allows administrators to define custom application-blocking policies by source or destination IP address, netmask, and port number.
 
 
 
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