He's using Log Shipping on SQL 2005 (3 versions before Availability Groups was introduced), the link and chart are hence not relevant.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability
We walk in the dark places no others will enter
We stand on the bridge and no one may pass