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| Dec 4, 2009 |
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IT Management >
Systems Operations >
Networking >
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ALSO CALLED:
Network Routing
DEFINITION: A fixed-length subnet mask (FLSM) is a sequence of numbers of unchanging length that streamlines packet routing within the subnets of a proprietary network. A subnet can be a geographically defined local area network (LAN). Alternatively, a subnet may define security boundaries, departmental boundaries, multicast zones or hardware security parameters.Once a packet has arrived at an organization's main
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Definition continues below.
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Routing White Papers
(View All Report Types)
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5 Matches
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IOS Tips and Tricks
sponsored by Global Knowledge
WHITE PAPER:
There are some helpful things we can do with Cisco’s IOS to make our lives easier. This white paper will present some useful commands, followed (in parentheses) by their most concise shortcuts (at the time of this writing).
Posted: 06 Nov 2009 | Published: 06 Nov 2009
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The Scoop on the New CCNA and CCNP Specializations
sponsored by Global Knowledge
WHITE PAPER:
There has been a lot of interest among students lately on the details surrounding the CCNA (Cisco Certified Network Associate) specializations and their relationship with the corresponding CCNP specializations. The purpose of this white paper is to put all the information about these into one concise reference document.
Posted: 22 Sep 2009 | Published: 22 Sep 2009
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Subnetting Shortcuts
sponsored by Global Knowledge
WHITE PAPER:
One of the most challenging topics for many CCNA candidates is subnet masking. This white paper will de-mystify the math behind subnetting, and provide examples of shortcuts that bypass the need for binary when doing calculations involving subnet masks.
Posted: 27 Aug 2009 | Published: 27 Aug 2009
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How Vulnerable Are Your Cisco IOS Routers?
sponsored by Global Knowledge
WHITE PAPER:
It may be surprising to some that Cisco routers run many services that could create vulnerabilities. This paper is meant to be a vehicle for discussion regarding the security of Cisco routers. Additionally, some best practices for securing your Cisco routers are defined.
Posted: 13 May 2009 | Published: 13 May 2009
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CCNA v2.0 Review: Critical Concepts of the 640-802 CCNA Exam
sponsored by Global Knowledge
WHITE PAPER:
This paper helps students understand the types of information required to pass the new 640-802 CCNA composite exam by providing a convenient review of the exam's critical concepts.
Posted: 17 Oct 2008 | Published: 17 Oct 2008
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ROUTING DEFINITION (continued): … gateway with its network number, that packet is routed to its ultimate destination using a subnet number. The FLSM is usually a string of binary digits shown over the subnet number, telling the router which parts of the subnet number to look at. A binary "1" over a particular digit in the subnet number says "Pay attention to this digit." A "0" says "Ignore this digit."The use of an FLSM saves a router the task of having to handle an entire IP address because the router deals only with the digits selected by the mask. Nevertheless, this method of subnet masking … Routing definition sponsored by SearchNetworking.com, powered by WhatIs.com an online computer dictionary
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