Google and Site Links

Does anybody have any idea as to how Google crawls internal link structure. Webmaster tools which ones have internal and external but it keeps changing. Do external links have any bearing on how many pages it credits internal links to?

The site navigation allows flow to all pages and directory structure is not deep, so the site is well linked.

its quiet tough to answer your question...

From what I understand, you'd like to know whether external links can help index your site's internal pages?

If that was the question, having external links point to your internal pages will definitely help Google find, index and rank your webpages.

A good site map helps in google to crawl internal pages of the site.

How Google crawls internal link structure.....

Well Google as well as most of the search engines follows same criteria to Crawl internal link structure.

Suppose you have link on your home page (wwwdotexampledotcom) under anchor text: Temporary sites and this Anchor text links to some page within your site like : wwwdotexampledotcom/data/files/tempsitesdothtml

Now Google can not access to this level "wwwdotexampledotcom/data/files/tempsitesdothtml" directly . So firstly spider will visit first level(data) then goes to second level(files) then your page will be crawled.


Thanks
GSL

I don't think your question is CLEAR at all !!

The internal links showed on webmasters tools are for you benefit to see how effective your internal linking is.

The external links are for you to see which of your external links google has discovered.

What's your source of information for this? It sounds a little inefficient, as what would happen about sites that are set up to redirect to something like /shop/home/index.html?

Thanks for all the answers and let me clarify. Do the amount of external links shown - in Webmaster Tools - have any effect on the amount of internal links Google allocates. In other words with a site showing only 5 external links will it still show and list all of the internal links, even if there are hundreds.

I'm only asking as they both seem to fluctuate at the same time, either both go up or both go down.

I think it's just that all the information sent to the webmaster console is updated at the same time. The information you see is certainly not real-time.

I think the two lists are not depending on each other.
I don't see how the two could be connected ?

The fluctuation could be either from owner changing the internal link structure or from google having a hard time understanding it (for internals) and google discovering new backlinks and not seeing old backlinks (may have been dropped from site owner)