In networking, the communications protocol that contains the logical address of a client or server station. It is called the "network layer" and contains the address (IP, IPX, etc.) inspected by a router that forwards it through the network. Layer 3 contains a type field so that traffic can be prioritized and forwarded based on message type as well as network destination. Since layer 3 provides more filtering capabilities, it also adds more overhead than layer 2 processing. See layer 3 switch, router and OSI.
 | Reproduced with permission from Computer Desktop Encyclopedia. Copyright (c) 1981-2008 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- Now that the HP-EDS deal has been consummated
- The Irregulars draws its 'crew' from a wide and varied group of technology interests. One is Charlie Bess, an EDS Fellow. These are the brightest of the brightest among EDS thinkers and we are honored to have Charlie's insights. Now that the HP-EDS deal has been consummated, Charlie felt free...
- Blog posts 2008-08-27
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- Go ahead...bring in your laptopWe allow people to use their ownso long as they allow me to install security software and updates and inspect the machines at my discretion. Those who do use their own see this as me doing them a favor, not the other way around.I use my...
- Discussion threads 2008-08-26
- VGSC (zip)
- For political & economic reasons, ISP may block VoIP in your country. To protect your VoIP business & profit, SpeedVoIP Communication Technology Co. is providing Security VoIP software solution, VGSC 2008, which installed on client sides PC, and support your X-lite, Linksys PAP2 without any VoIP blocking. Key Features: Maximum...
- Software downloads 2008-08-26
- Is SOA an elixir or real fix for 'medieval' data practices?
- Is SOA an elixir or real fix for 'medieval' data practices?All about the dataI can't agree more with Ash. The data is a pivotal piece of an SOA (most IT approaches, really), and is often under-served by SOA initiatives and projects. Data is diverse, duplicated, dispersed, dirty, and...
- Discussion threads 2008-08-25
- Qwest CTO on FTTP, bandwidth caps and integrated services
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- Blog posts 2008-08-25
- Over my dead body
- Over my dead bodyStick to what you know, Murph!Hmm, last week you were saying you had little experience with SMEs and were offering space on your blog to those who do, today you are making stunningly sweeping generalizations about their employees! Where's your data!?My business focus, since 1993, has been...
- Discussion threads 2008-08-25
- PhoneFactor for LogMeIn (exe)
- Secure access to your company or personal computer by adding PhoneFactor to LogMeIn. PhoneFactor adds a second layer of authentication an automated phone call to the existing LogMeIn sign-on process. With PhoneFactor, if someone hacks your password and tries to login to your computer using LogMeIn you'll instantly get a...
- Software downloads 2008-08-25
- The layered approach ... my wish for a future OS
- The layered approach ... my wish for a future OSSounds a lot like BSD to me....BSD (and therefore Mac OS/X) has much the same structure as the one you describe. Indeed this structure has some inherent advantages.However, in practice BSD doesn't have a stability or reliability advantage over Linux. Linux...
- Discussion threads 2008-08-20
- HS TFTP .NET Class Library (exe)
- HS TFTP .NET class library is a .NET component which implements TFTP server and client functionality over UDP socket layer according to RFC 1350 Trivial File Transfer Protocol. HS TFTP .NET is designed for use from Visual C# .NET C Sharp. The use of HS TFTP .NET class library is...
- Software downloads 2008-08-20
- Windows 7 wishes
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- Discussion threads 2008-08-19
- An Event Apart 2008: Day 2
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- Blog posts 2008-08-19
- HP Pavilion Elite m9300t
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- Product reviews 2008-08-18
- An Event Apart 2008: Day 1
- The antique Palace Hotel in San Francisco houses An Event Apart, a collaboration of interactive presentations about web standards, user experience design, and best practices. The two-day conference features well-known speakers from around the world, including AEA's hosts Jeffrey Zeldman and Eric Meyer. ...
- Blog posts 2008-08-18
- The end run around the OS is underway
- The operating system may be losing its luster. In fact, you could argue that the operating system--Linux, OS X and Windows--will become an application that just happens to boot first. And hardware vendors are on to the OS's diminishing importance. Let's connect a few dots: ...
- Blog posts 2008-08-15
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- Blog posts 2008-08-14
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- The eMachines W3653 is a bundled set that includes a preconfigured computer, an eMachines 17-inch wide-screen LCD, and the other peripherals needed for a complete desktop set up. For the purpose of this review, we'll be looking at the computer alone but factoring in the price of the monitor to...
- Product reviews 2008-08-13
- Virtual Machine Software Announcements - Why Now?
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- Discussion threads 2008-08-13
- Virtual Machine Software Announcements - Why Now?
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- Blog posts 2008-08-13
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- Discussion threads 2008-08-12
- What's holding Desktop Virtualization back?
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- Blog posts 2008-08-12
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