Deciding What to Memorize
The amount of memorization you must undertake for an exam depends on how well you remember what you've read and how well you know the software by heart. If you're a visual thinker and can see the command-line interface in your head, you won't need to memorize as much as someone who's less visually oriented. However, the exam will stretch your abilities to memorize the theory behind the command line, such as design approaches, quality of service, and the protocols.
At a minimum, you'll want to memorize the following kinds of information:
Enterprise composite model for designing networks
STP functionality and deployment
Various switches and modules
VLAN trunking protocols and management
Redundancy and HSRP
Fast and Gigabit ...