It's very natural to model network traffic in a graph since a network is a graph. We can model network traffic where each IP address is a node, and a connection is a relationship.
Network engineers will often capture packets in a pcap file that can be analyzed by a tool such as Wireshark.
This is a command-line utility that parses a packet capture file into a graph. Here's an example:
go run pcap_neo4j.go -file sample.pcap -url bolt://neo4j.woolford.io:7687 -database pcap -user neo4j -password s3cret123