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Frequency response analysis in electrical circuits provides vital insights into a circuit's behavior as the frequency of the input signal changes. The transfer function, a mathematical tool, is instrumental in understanding this behavior. It defines the relationship between phasor output and input and comes in four types: voltage gain, current gain, transfer impedance, and transfer admittance. The critical components of the transfer function are the poles and zeros.
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Automated Deployment of an Internet Protocol Telephony Service on Unmanned Aerial Vehicles Using Network Functions Virtualization
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Performance Analysis of Software-Defined Networks to Mitigate Private VLAN Attacks.

David Álvarez1, Pelayo Nuño1, Carlos T González1

  • 1Department of Computing, University of Oviedo, Campus de Viesques, 33204 Gijón, Asturias, Spain.

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Summary

Software-defined networking (SDN) offers superior performance for network segmentation compared to traditional access control lists (ACLs). SDN mitigates security risks more effectively in complex corporate networks, reducing latency and packet loss.

Keywords:
private VLAN (PVLAN)securitysegmentationsoftware-defined networks (SDNs)

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Area of Science:

  • Computer Science
  • Network Security
  • Network Engineering

Background:

  • Defence-in-depth (DiD) is a network security strategy involving layering and segmentation, often using VLANs or PVLANs.
  • Traditional DiD methods struggle with scalability in large corporate networks.
  • Software-defined networking (SDN) presents a promising solution for advanced network segmentation.

Purpose of the Study:

  • To emulate a corporate network scenario using private virtual local area networks (PVLANs).
  • To conduct a comparative performance analysis of network defense strategies.
  • To evaluate mitigation techniques against a known PVLAN attack.

Main Methods:

  • Emulation of a corporate network using PVLANs.
  • Execution of a simulated PVLAN attack within the emulated network.
  • Comparative analysis of mitigation strategies: Access Control Lists (ACLs) versus SDN.

Main Results:

  • Performance metrics including CPU/memory usage, communication delay, packet loss, and power consumption were analyzed.
  • Both ACLs and SDN mitigation strategies were tested under various network conditions.
  • The SDN approach demonstrated superior performance, especially in oversubscribed network designs.

Conclusions:

  • SDN significantly enhances network segmentation capabilities for large-scale environments.
  • SDN offers a more efficient and scalable solution for network defense compared to traditional ACLs.
  • The findings highlight SDN's potential to improve security and performance in corporate networks.