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Volume 3

The Isolated Ward

Architecting Secure IoMT Networks to Stop Lateral Cyber Threats

A single compromised infusion pump shouldn't bring down an entire hospital's digital infrastructure.

Strategic Objectives

• Master hardware-level traffic isolation to contain digital infections.

• Design resilient network topologies specifically for clinical workflows.

• Eliminate lateral movement of threats across hospital LANs.

• Implement zero-trust principles at the physical and data link layers.

The Core Challenge

Clinical environments are flooded with vulnerable IoMT devices that lack native security, creating a massive, flat attack surface for ransomware and data breaches.

01

The Vulnerable Clinical Perimeter

02

Defining Micro-segmentation

03

The IoMT Ecosystem

04

Stopping Lateral Movement

05

Architectural Foundations

06

Layer 2 Isolation

07

The Role of the Access Layer

08

Hardware-Level Traffic Filtering

09

Software-Defined Perimeters

10

Trust and Verification

11

Next-Generation Internal Firewalls

12

The MAC Layer Defense

13

Inter-VLAN Routing Security

14

Air Gapping vs. Logical Isolation

15

The Impact of Latency

16

Wireless Clinical Segments

17

Monitoring the Segments

18

Automated Policy Enforcement

19

Legacy Device Integration

20

Compliance and Standards

21

The Future of Clinical Networking

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