Table 2.

Reasons of AS neighbor dynamics.

No.	Reasons of AS neighbor values
1	Due to price of traffic to find low-cost ISP
2	Due to change of routing path for finding adjacency path
3	To have two or more upstream ISP so by the passage of time due to bill of traffic one or any of them can be cut off
4	Due to disappear of some company, which initially used Internet access as a network access necessity for his/her company