In 1999 I wrote a series of Border Gateway Protocol tutorials including a tutorial on autonomous system numbers. Since then AS numbers have been changed from 16-bit to 32-bit numbers to avoid running out of identifiers for BGP sessions. I have updated theAS numbers tutorial with a table that outlines what each range of autonomous system numbers are used for.

What scenarios are appropriate for using static routing? When should I use static routing?

Read More: When to use Static Routing