There are several areas on the exam that may prove difficult:
- Quality of Service (QoS): You will need to know how to configure QoS and when it should be deployed. The Command syntax for QoS will be an area you must be good with as well.
- Commands: It’s no secret that Cisco loves to have you choose the proper command. You need to be very comfortable with commands in order to have a chance of passing this exam.
- Dial Plans: You must be able to configure dial plan components on any device presented on the exam. If you’re not comfortable with dealing with dial-peers and other components, you will have problems.
- Protocols: These could present some issues if you’re not familiar with them. You will need to understand how they operate and what scenarios they are deployed. The standard ones include H.323, SIP, SCCP, MGCP, and RTP. These protocols might be very vague or they could be in detail, so make sure you know them well.
It helps to be aware of how Cisco writes their questions. You will need to carefully examine the question to best decide how to answer it. Some of the questions will probably look very close with only a few words that will totally change the answer.