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BackWhat is Network TAP?
A network TAP (Test Access Point) is a hardware or virtual device that creates a copy of network traffic for monitoring and analysis without interrupting communications. Understanding what is network TAP is important because security and network teams use TAPs to gain complete visibility into network activity without affecting production traffic. Unlike port mirroring, a network TAP provides a dedicated and reliable copy of traffic for monitoring tools.
Why do organizations use a network TAP?
Security monitoring depends on accurate network visibility. If monitoring tools miss packets or experience delays, security teams may overlook important events during investigations.
Organizations use network TAPs to:
- Improve network visibility
- Support security monitoring
- Capture complete traffic flows
- Assist forensic investigations
- Enhance network troubleshooting
These capabilities help monitoring tools analyze network activity more accurately.
How does a network TAP work?
It sits between two communicating network devices and passively copies traffic flowing in both directions. It forwards the original traffic without modification while sending an identical copy to monitoring or analysis tools.
A typical process includes:
- Traffic passes through the TAP
- The TAP copies inbound and outbound traffic
- Original traffic continues uninterrupted
- The copied traffic is sent to monitoring tools
- Security teams analyze the captured data
- Investigation or monitoring continues without affecting production systems
This approach provides continuous visibility without introducing additional network latency.
Where are network TAPs commonly deployed?
Organizations install TAPs where continuous network visibility is essential for security operations and troubleshooting.
| Deployment area | Common purpose |
|---|---|
| Data centers | Monitor critical network traffic |
| Internet gateways | Inspect inbound and outbound communications |
| Core network links | Capture high-volume traffic |
| Security operations centers | Feed monitoring platforms |
| Cloud connectivity points | Observe hybrid network traffic |
These deployment locations help organizations monitor communications across important parts of the network.
What are the benefits of using a network TAP?
Network TAPs provide reliable traffic visibility while avoiding many limitations associated with software-based monitoring methods. Common advantages include:
- Complete traffic capture
- Passive network monitoring
- No impact on production traffic
- Reliable packet visibility
- Support for multiple monitoring tools
These benefits make TAPs a common component of enterprise security monitoring architectures.
Supporting network investigations
It provides visibility into network communications, but security investigations often require additional context from the endpoints generating that traffic. Combining network observations with endpoint evidence helps analysts understand the full scope of an incident.
Hexnode XDR can support investigation workflows through:
- Visibility into endpoint activity
- Centralized incident review
- Investigation of suspicious events
- Endpoint scans during security investigations
- Context gathering from affected devices
- Remote terminal access when appropriate
These capabilities help security teams correlate network observations with endpoint activity during investigations.
FAQs
A network TAP creates a dedicated copy of traffic directly from the network link, while port mirroring depends on switch resources and may drop packets under heavy traffic.
No. A network TAP passively copies traffic and forwards the original packets without altering or delaying communications.
Yes. It provides complete network traffic visibility, helping analysts review communications and investigate suspicious network activity.