Description of black chain and how to distinguish black chain

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First, let me explain what is "black chain"?

Black chain (also called Dark chain) is not visible on the page, but there is a connection in the code, of course, although the black chain in the page is not visible, but the actual black chain is also an effective outside the chain. Then the so-called SEO black chain is some people use hacker technology, access to other people's Web site backstage, and to obtain administrative rights, through the addition of code, to achieve the hidden one or more export links.

So what's the downside of a Web site being added to the black chain? In the SEO perspective, the black chain belongs to an external link, you can change the link address point to the site to increase the PR value, popular point is the site weight, improve the chain of the site rankings. Nature and friendship links the same bar!

Those people spend so much energy to hang the black chain, what's the advantage of this black chain to the website? First, the black chain is also an effective outer chain, which we have identified. Since it is effective outside the chain, it can be said that the black chain in a short time can quickly improve rankings, especially for those new site webmaster, the site is a new station, no PR value, not much included, and others exchange links, difficult and difficult. There are some rubbish stations built by Stationmaster. Long-term does not update, everywhere is the collection, the article quality is extremely low, who is willing to change? Black chain can completely solve this problem, and can bring a very high weight one-way link, get very good rankings, as well as SEO also saved a lot of time, this for beyond competitors, and how to add weight of the site is definitely a shortcut. Similarly, every thing has its pros and cons, what is the downside of the black chain? With the development of the search engine, its algorithm is also constantly improving, search engine technology is also growing. Search spiders are also aware of the black chain, the fight against black chain is taken for granted. Serious will result in K station. So say or honest SEO optimization, is the long-term.

Speaking of which, let's illustrate the Black Chain code:

One is, it is common. The code is as follows:

<marquee height=1 width=5 scrollamount=3000 scrolldelay=20000>
<a href=http://www.p528.com >p528</a>
</MARQUEE>
Links in order to demonstrate, add is the site, the keyword is generally the number of letters and numbers (not easy to find it)
Another is:
<script language= "javascript" type= "Text/javascript" >
document.write ("<div style=display:none;>");
</script><div>
<h1>
<a href= "_fcksavedurl=" "_fcksavedurl=" "_fcksavedurl=" "http://www.p528.com" >p528</a>
</h1></div>
<script language= "javascript" type= "Text/javascript" >
document.write ("</div>");
</script>
You may say that the JS code spider will not crawl, but this code search engine can be crawled. Here we do not have to explain more, you know it.

Black chain So hateful how do we prevent it? The above mentioned in the source code can be seen, so the webmaster should be diligent point, have time to see more source code, as long as you find in your website source of inexplicable link codes, can be called Black chain. The way to deal with it is to delete it. So everyone in the management of the site, pay attention to security protection, background password not too simple. and to develop a regular view of the site source code (general home can be) habit, found inexplicable link in time to delete.

These are my views on the black chain, I hope to share your views on the black chain!