Link Building in same C Class Ip address
After couple of day I make posting in my blog with titled how to pass TOEFL exam. let's say keyword for that posting is pass TOEFL exam.
My question is if I want to optimize my posting which is how to pass TOEFL exam through article marketing, is that still worth? because I already have link from EZA, GA pointing to my website with keyword IELTS exam.
There is opinion from another Internet Marketing that if I already have a link from another website pointing to my website and I make another link pointing to another page in my website, its still counted one because still in same C class IP address.
What is your opinion guys?