Networking · SOC Analyst

Why does a SOC analyst need to know networking?

Most SOC investigations involve network logs (firewalls, IDS/IPS, NetFlow). Without networking foundations, you can't: (1) Read packet captures effectively (Wireshark requires TCP/IP fluency); (2) Distinguish normal vs anomalous traffic patterns (TCP handshake anomalies, port scans, unusual protocol use); (3) Validate firewall denies (was the deny correct? what would have happened if allowed?); (4) Understand cloud network logs (VPC Flow Logs, Azure NSG flow logs require networking baseline); (5) Investigate lateral movement (internal network paths, remote service access). CCNA-level depth is the minimum bar. SOC L2/L3 roles often expect Network+ or higher.

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