'Don't learn by heart that which you can look up.'.... apart from enough basics to get you up and connected so that you CAN look things up! ;)
There's a whole debate about the education system and learning things by rote that can be looked up. In many sectors you have reference tomes. ..some MUST be reviewed before doing any work. I think there are some key advantages to knowing things when in the field BEFORE you then see the rest of the day go by while troubleshooting. You have to know eg the basics of OSPF to know what to look up when an adjacency doesn't come up. ..to be in 'the right ballpark' as they say :) alan
