Exam Essentials

Know the various network connectivity issues and how to troubleshoot them. Common network issues that you can expect to be tested on include IP addressing such as incorrectly defined subnet masks, default gateway configurations, errors in routing, and DNS configurations. Know at a basic level what QoS is and the symptoms of network saturation. Be able to identify what the actual problem is for the exam. For example, poor network performance would point to a latency or QoS issue, and if the question is about a failure to connect to a remote site using its domain name, it would be a DNS problem.

Know how to identify networking issues. There may be questions on network traffic not being able to make it to its destination where you need to identify the network issue. This can include using command-line troubleshooting tools, investigating log files, and monitoring systems to gather information on the reported issue. There may be a long scenario where you are given a large...