Final answer:
Zeek and Suricata are well-known network traffic analysis tools, whereas GuardDuty is a threat detection service and a VPN is a technology for secure network connections, not traffic analysis.
Step-by-step explanation:
In the context of network security and management, the following are recognized as network traffic analysis tools:
- Zeek (formerly known as Bro) is an open-source network monitoring tool that focuses on security-monitoring and performs real-time analysis of network traffic.
- Suricata is a high-performance Network IDS, IPS, and Network Security Monitoring engine open sourced and maintained by the OISF (Open Information Security Foundation).
On the other hand, GuardDuty is an AWS service that offers threat detection for your AWS infrastructure and resources, but it is not specifically a network traffic analysis tool. Lastly, a VPN (Virtual Private Network) is not a network traffic analysis tool, rather it is a technology that creates a safe and encrypted connection over a less secure network, such as the public internet.