SPF

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   The Sender Policy Framework (SPF) is an email-authentication technique which is used to prevent spammers from sending messages on behalf of your domain. With SPF an organisation can publish authorized mail servers.

English - Language

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   this website is using English as a language parameter

Google Hosted Libraries

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   The Google Hosted Libraries is a stable, reliable, high-speed, globally available content distribution network for the most popular, open-source JavaScript libraries.

jquery 1.4

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   JavaScript library for DOM operations

jqueryui 1.7.2

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   A curated set of user interface interactions, effects, widgets, and themes built on top of the jQuery JavaScript Library.

Meta keywords

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   Meta keywords are types of meta tags in the HTML source code of a webpage. They describe the content of a website shortly and concisely,this website is using the following keywords: Arlington condos, mls , Fairfax county real estate, Northern Virginia realty,Fairfax county real estate, Arlington, Alexandria, Falls Church, condos,luxury,22201

Meta Description

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   A meta description is a 160-character snippet, a meta tag in HTML, that summarizes a page`s content. this website is having meta description of the following : Northern Virginia Homes For SALE. Award-winning LOCAL Blog & MLS search w/ addresses & Free Email alerts. Serving Real Estate in Northern Virginia like Arlington Condos, and DC.

SEO Robots : Allow to index and follow website links

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   Meta robots tag is a tag that tells search engines what to follow and what not to follow.

Robots No Open Directory Project

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   These are used if your website is listed in this directorie with information you do not want used in the results pages. This might be the case if you have old, outdated listings that no longer apply. They tell robots not to use information from these sources, and they are optional.

Robots No Yahoo Directory

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   These are used if your website is listed in this directorie with information you do not want used in the results pages. This might be the case if you have old, outdated listings that no longer apply. They tell robots not to use information from these sources, and they are optional.

Apache

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   The Apache HTTP Server, colloquially called Apache, is free and open-source cross-platform web server software, released under the terms of Apache License 2.0. Apache is developed and maintained by an open community of developers under the auspices of the Apache Software Foundation.

PHP 5.3.29

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   PHP: Hypertext Preprocessor is a general-purpose programming language originally designed for web development.

Chunked transfer encoding

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   Chunked transfer encoding is a streaming data transfer mechanism available in version 1.1 of the Hypertext Transfer Protocol (HTTP). In chunked transfer encoding, the data stream is divided into a series of non-overlapping "chunks"