Something about "www9.domain.com" and static.ak.fbcdn.com"
I have searched a lot but got confused regarding these..
1) I have seen a free sms website, when i log into that the url looks like www9.domain.com. I know that URL start with WWW only but what is www9.. ?
2) When logging into Facebook the status bar says connecting or transferring data from static.ak.fbcdn.com , I know about sub domains that are subdomain.domain.com
but why there are two dots before fbcdn.com.. (may be silly question)
Hope everyone understand what am I trying to ask...