The document discusses troubleshooting an enterprise network. It covers isolating and resolving issues with switching, routing, WAN configurations, and ACLs. Specific problems that could occur with switches are at the physical layer. Troubleshooting approaches include determining the scope of the problem, isolating it to a specific failure domain, and using methods like top-down, bottom-up, or divide and conquer. The goal is to maintain network uptime by addressing issues proactively through monitoring and maintenance.
Frame relay is a standardized wide area network technology that specifies the
physical and logical link layers of digital telecommunications channels using
a packet switching methodology.