Lammle book' Switches ??

I am going for 640-607 and read only Lammle book ,I think it's enough for the syllabus,but I am concerned about one topic now it's the Catalyst 1900 Switch, a lots of commands r written there in the Lammle book at the end.Is it important for the Exam should I go through it ?? Is there any particular topics important in that section ?? Pls reply soon