Title: Troubleshoot common WAN issues.
Course: Cybersecurity Systems Technology, Advanced (10109-IV) > Section: Troubleshooting Networks

Troubleshooting should include an explanation of how to resolve the issue, and the following:

- Loss of Internet connectivity
- Interface errors
- Split horizon
- DNS issues
- Interference
- Router configurations
- Customer premise equipment
  - Smart jack/Network Interface Unit (NIU)
  - Demarc
  - Loopback
  - Channel Service Unit (CSU)/Data Service Unit (DSU)
  - Copper line drivers/repeaters

- Company security policy
  - Throttling
  - Blocking
  - Fair access policy/utilization limits
  - Satellite issues (latency)

Process/Skill Questions:

- What is your school’s WAN security policy?
- What methods can be used to alleviate DNS issues?