Hey there π
Rick Cao
Network Engineer
I'm a network engineer with a passion for networking, automation and other things I interest in. This site hosts a bit about me, selected projects, and technical notes.
My latest projects </>
Network Endpoint Tracernetwork tools
A prototype tool for solving repetitive task in production. The tool collects ARP, MAC, and LLDP/CDP neighbor data from multi-vendor devices, stores them as SQLite snapshots, and traces endpoint attachment by combining ARP resolution, MAC-table filtering, and constrained topology traversal.
Latest from blog
Email delay troubleshootingNetwork
How dual-segment packet captures, SACK blocks, and cross-path comparison exposed a TLS handshake gap caused by likely MTU/PMTUD issues.