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Difficulty: MediumVirtualization Security Considerations and Network Configurations

A software developer configures a virtual machine (VM) on a local workstation to run software integration tests. The VM requires outbound access to the internet to download update packages, but it must not be directly accessible as an independent device on the physical corporate network to prevent exposing the local subnet to test traffic. Which virtual network interface configuration should be applied to meet these requirements?

  1. Network Address Translation (NAT) modeAnswer
  2. B
    Bridged mode
  3. C
    Host-only mode
  4. D
    Internal mode using HTTPS port forwarding

Answer

Network Address Translation (NAT) mode is the correct configuration because it enables the virtual machine to access external internet resources by utilizing the host computer's IP address while remaining unreachable from direct inbound network traffic originating on the physical local area network.
Network Address Translation (NAT) mode provides outbound internet connectivity by translating the virtual machine's private virtual IP address into the host system's IP address. This allows the guest VM to initiate outbound web connections while protecting the physical network from direct incoming connections initiated toward the VM.

Step-by-Step Solution

1
Analyze the network access requirements of the virtual machine.
The virtual machine requires outbound access to download files from the internet.
Software updates and dependency downloads require internet reachability.
2
Analyze the security isolation constraints.
The virtual machine must not appear as an independent physical host on the local area network.
Direct placement on the physical subnet exposes local network devices to potential test traffic and security risks.
3
Compare virtual network adapter modes against the criteria.
NAT mode satisfies both outbound internet access and local network isolation by sharing the host IP address via network address translation.
NAT routes outgoing traffic through the host's network card while hiding the VM's internal virtual IP from incoming external traffic.

Key Concept

Virtual Machine Network Interface Modes (NAT vs. Bridged vs. Host-Only)
Estimated Time:1m 15s
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Topics

Virtualization Security Considerations and Network Configurations

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