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| Dec 2, 2009 |
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IT Systems >
Communications Networks >
Internet >
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ALSO CALLED:
Internet Protocol Addresses,
Internet Addresses,
IP Numbers
DEFINITION: A subnet mask is a screen of numbers used for routing traffic within a subnet. Once a packet has arrived at an organization's gateway or connection point with its unique network number, it can be routed to its destination within the organization's internal gateways using the subnet number. The subnet mask consists of a screen of numbers indicating to the router which numbers it should look at underneath.
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Definition continues below.
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IP Addresses Multimedia
(View All Report Types)
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2 Matches
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Podcast: This Month in the Threat Webscape
sponsored by Websense, Inc.
PODCAST:
The Websense Security Labs Team provides a review of the recent July threats. Highlighted are a few examples of high-profile Web sites that were compromised with malicious code.
Posted: 02 Sep 2009 | Premiered: 02 Sep 2009
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This Month in the Threat Webscape for July 2009
sponsored by Websense, Inc.
VIDEO:
In this video, learn more about the top techniques for defending your organization from Web threats. Techniques include the monitoring, classification, and identification of all Web content in real time.
Posted: 02 Sep 2009 | Premiered: 02 Sep 2009
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IP ADDRESSES DEFINITION (continued): … In a binary mask, for example, a "1" over a number says "Look at the number underneath;" a "0" says "Don't look." Using a mask saves the router having to handle the entire 32 bit address; it can simply look at the bits selected by the mask.Using the previous example (which is a very typical case), the combined network number and subnet number occupy 24 bits or three of the quads. The appropriate subnet mask carried along with the packet would be: 255.255.255.0Or a string of all 1's for the first three quads (telling the router to look at these) and 0's for the host number (which the router … IP Addresses definition sponsored by SearchNetworking.com, powered by WhatIs.com an online computer dictionary
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