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) 1981-2009 The Computer Language Company Inc. All rights reserved. |
Additional Resources
- AVADirect Nano Cube
- AVADirect's $2,266 Nano Cube tries to take on Shuttle's XPC H7 5800 at its own small form factor game. Both systems come with smaller-than-normal SFF cases, and each requires sacrifices, even more than with a standard SFF PC, in exchange for its tiny dimensions. Therein lies our problem with this...
- Product reviews 2009-11-04
- Walmart unveils 15.6" HP Pavilion G60 laptop for $298
- hmmfor once, i agree with you. why are they still making the celeron...? shouldn't the atom replace that?Intel Celeron?is Inhel still making this 10 year old crap?surplus maybe? ntnti feel 298 is bad for celron processor..but still good option for ppl who r new to these creepy labtops..RE: Walmart unveils...
- Discussion threads 2009-11-04
- Averatec D1130 All-in-One
- The Averatec D1130 All-In-One is a stripped-down version of the D1133 we reviewed last month, and while this version cuts the price down to only $399, it also strips away many of the features that gave the higher-end model some value. With its puny 1.6GHz Intel Atom chip, 1GB of...
- Product reviews 2009-10-30
- Acer Aspire Revo AR1600-U910H
- Typically our challenges with the emergent Nettop category have been that real budget PCs cost just a little bit more and provide a dramatic performance uptick, and similarly priced Netbooks offer equivalent performance with the added benefit of portability. The Aspire Revo 1600's price tag alone answers those issues. ...
- Product reviews 2009-10-30
- Asus K50IJ-RX05
- asus k50IJThe ASUS K50IJ series is one of the latest budget notebooks designed to provide better performance than a netbook and a larger screen for only a modest price increase. ASUS K50IJ-C1 Specifications:Windows Vista Home Premium (SP1, 32-bit)Intel Core 2 Duo processor T6500 Processor (2.1GHz)15.6" 16:9 Wide Format (1366 x...
- Discussion threads 2009-10-25
- Apple iMac 27-inch
- If we could, we'd take points away from this iMac simply because by giving it a 27-inch display Apple threatens our livelihood. You don't need our input to simply walk past the 27-inch iMac on a store shelf and recognize that it's the largest all-in-one currently available, and that it...
- Product reviews 2009-10-21
- Asus Eee Top ET2002
- Nvidia wants us to tell you that its GeForce 9400M graphics chip, aka Nvidia's Ion technology, pulls Asus' Eee Top ET2002 up from the depths of Nettop misery by imparting it with better-than-terrible graphics and video processing. We agree that the 9400 chip improves the ET2002's visual chops, but a...
- Product reviews 2009-10-20
- Will Windows 7 have the right touch?
- The touch interface has arrived on smartphones, thanks largely to the iPhone. But it hasn't found much mainstream success on the PC despite years of trying. The imminent arrival of Windows 7, which has multi-touch support built-in, and a separate Touch Pack with sample apps and games, has rekindled interest...
- Blog posts 2009-10-19
- Psystar Open(Q)
- If nothing else, Psystar's OpenQ should serve as a message to Apple that it's long overdue in bringing quad-core CPUs to its mainstream desktops. Because as much as the OpenQ lacks Apple's design polish, this $799, illicitly OS X-based midtower runs circles around Apple's $1,499 24-inch iMac on our benchmarks....
- Product reviews 2009-10-09
- Chasys Draw IES 3.05 (Windows)
- Chasys Draw IES formerly Chasys Draw Artist is a suite of applications including a layer-based image editor with animation, vista-style icon editing support and super-resolution via image stacking Chasys Draw IES Artist, a multi-threaded image file converter Chasys Draw IES Converter and a fast image viewer Chasys Draw IES Viewer....
- Software downloads 2009-10-09
- ZT Affinity 7334Ma (Phenom 2 X4 945 3GHz, 8GB RAM, 1TB HDD, Vista Home Premium 64-bit)
- Apparently, ZT Systems didn't get our memo asking for a complete redesign of its Affinity series desktop computers. Earlier this year, we bemoaned the blase styling of the Affinity 7308Ma, and although this new $800 Affinity 7334Ma looks just as generic, it still offers a robust set of components including...
- Product reviews 2009-10-07
- Gateway ZX6810-01
- Congratulations to Gateway's One ZX6801-01 for sending in the first official Windows 7-based PC to CNET Labs. We've already reviewed Windows 7, so we'll spend most of our energy here talking about Gateway's new PC. We like the One ZX6810-01 well enough. When it goes on sale for $1,399 at...
- Product reviews 2009-10-07
- LiveQuartz 1.8.4 (Mac)
- LiveQuartz is a simple and powerful free photo editor for Leopard. It is based on non destructive layers and lters. The layers are at the left and the lters are at the right of the window. To edit a photo, just drag it into the window (or...
- Software downloads 2009-10-02
- Averatec D1133 All-In-One
- Does a certain price make a nonmobile computer a Nettop? How about a particular CPU or case design? The Averatec D1133 All-In-One blurs the lines. Its low price and relatively slow performance make an argument for calling it a Nettop. But even though it's slow by conventional PC standards, thanks...
- Product reviews 2009-09-30
- ImageWell 3.7.4 (Mac)
- ImageWell is the easy way to edit, rotate, crop, and resize your image or screenshot, and upload it to your iDisk (.mac account), FTP/SFTP server, WebDAV server, or send to your flickr, SmugMug or ImageShack account. Add colored borders, take screen grabs, and store multiple locations for sending. At the...
- Software downloads 2009-09-27
- Cute FTP Professional 8.3.3 (Windows)
- Cute FTP Professional is a powerful FTP client for Windows. It enables you to connect and transfer files securely using SFTP (Secure Shell/SSH), FTPS (Secure Socket Layer SSL over FTP) and one-time passwords. You can transfer files quickly using CuteFTP Professional's multipart transfer and simultaneous connections. Easily manage and maintain...
- Software downloads 2009-09-24
- Lenovo C300-3012 (Atom 230 1.6GHz, 4GB RAM, 640GB HDD, Vista Home Premium)
- If we to adopt a relativist approach and consider Nettops apart from the larger desktop market, we might actually recommend the $549 Lenovo C300. It includes an uncommonly large 20-inch wide-screen display and performs better than many of its peers because of a slightly faster Intel Atom CPU. Standing in...
- Product reviews 2009-09-23
- Six tips to photographing beautiful sunsets
- Sunsets are probably my favorite non-human subjects to photograph. Each one is different, yet beautiful in its own way. The sky is rich with colors and can change the entire landscape around it. But, if you're not careful, sunset and twilight photos can turn out dark, hiding details in the...
- Blog posts 2009-09-22
- SketchBook Mobile 1.0 (Mobile)
- SketchBook Mobile offers a full set of sketching tools for the iPhone or iPod Touch and delivers them through a streamlined and intuitive user interface.Use it to digitally capture your ideas as napkin sketches or produce artwork on-the-go.SketchBook Mobile delivers sophisticated brushes and fluid pencils.Featured with full Screen work space...
- Software downloads 2009-09-21
- PBS.org hacked, serving malware cocktail
- They must be running linux.yes, they are running LinuxSurprise, Linux is not immune...However, to be fair this hack was likely through some application layer vulnerability, not a Linux exploit, unless the admin is really inept. Most likely a SQL injection attack.Linux nor Windows are really hackable when set up as...
- Discussion threads 2009-09-18
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