tcpdump

wireshark

iptraf

mtr

perf

iperf

Referencias

https://danielmiessler.com/study/tcpdump/

Modelo OSI y TCP/IP

https://www.tecmint.com/audit-network-performance-security-and-troubleshooting-in-linux/

https://www.fosslinux.com/7069/installing-and-using-perf-in-ubuntu-and-centos.htm