All-Optical Networks Overview
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Questions and Answers

Which feature is characteristic of a unified transport network (UTN)?

  • Limited bandwidth capabilities
  • Redundancy in data centers only
  • Support for multiple services (correct)
  • Increased latency for data transmission

What type of network enables full-service access and is widely used in video surveillance?

  • Integrated transport network
  • Software-defined networking (SDN)
  • Unified transport network
  • Passive Optical Network (PON) (correct)

Which attack involves an attacker covertly listening in on network traffic?

  • Spoofing
  • Quality of Service (QoS) Degradation
  • Traffic Analysis Attack (correct)
  • Data Delay

What does the IP integrated transport network support that is essential for network slicing?

<p>Flex-E and IPv6 Segment Routing (C)</p> Signup and view all the answers

Which type of attack deprives a user of expected services?

<p>Service Denial (D)</p> Signup and view all the answers

Which scenario best describes 'Data Delay' in the context of network attacks?

<p>An attacker temporarily holds intercepted data for future use (B)</p> Signup and view all the answers

What type of network operates using the underlay model to enhance network control?

<p>Software-defined networking (SDN) (B)</p> Signup and view all the answers

Which combination of networks refers to fiber to the site, fiber to the building, and fiber to the home?

<p>All-Optical Networks (AON) (C)</p> Signup and view all the answers

What does QoS degradation in network attacks typically lead to?

<p>Reduced operational efficiency (B)</p> Signup and view all the answers

What is a primary goal of evaluating robustness in a target system?

<p>To determine external perturbation resistance (D)</p> Signup and view all the answers

Which method is NOT used for detecting attack signals in All-Optical Networks?

<p>Firewall log analysis (C)</p> Signup and view all the answers

Crosstalk attacks primarily affect connections at which point in an All-Optical Network?

<p>At the wavelength switch (B)</p> Signup and view all the answers

Which of the following accurately describes the role of optical amplifiers in All-Optical Networks?

<p>They are critical for signal transmission. (C)</p> Signup and view all the answers

What is the function of Optical Time Domain Refractometries (OTDRs)?

<p>To analyze echo behavior of pilot tones (D)</p> Signup and view all the answers

Which type of attack includes both eavesdropping and traffic analysis?

<p>Tapping Attacks (C)</p> Signup and view all the answers

What distinguishes optical spectral analyzers (OSAs) in attack detection?

<p>They display the spectrum of an optical signal. (B)</p> Signup and view all the answers

Which entity is primarily evaluated to assess the robustness of a system?

<p>Target System (C)</p> Signup and view all the answers

What is a common misconception about service disruption attacks?

<p>They include only physical attacks. (A)</p> Signup and view all the answers

What is NOT a method used for service disruption in All-Optical Networks?

<p>Application-level crashes (B)</p> Signup and view all the answers

What aspect of a robust system does the error model primarily deal with?

<p>Error types and their implications on system performance (B)</p> Signup and view all the answers

Which of the following is NOT a subdimension of error timing?

<p>Frequency of occurrence (B)</p> Signup and view all the answers

In workload selection, which characteristic ensures a representation of real-world usage?

<p>Representativeness of the system's services (D)</p> Signup and view all the answers

What type of intrusion detection system is designed to apply countermeasures?

<p>Intrusion Prevention Systems (IPS) (A)</p> Signup and view all the answers

Which of the following is a limitation of traditional firewalls?

<p>Failure to detect internal attacks (C)</p> Signup and view all the answers

Failure modes and error propagation are essential metrics for what?

<p>Quantifying robustness of a target system (B)</p> Signup and view all the answers

Which element is commonly excluded from robust workload selection considerations?

<p>User interface design aspects (B)</p> Signup and view all the answers

What primary purpose do cryptography and access control serve in a computing environment?

<p>Securing communications and authentication (B)</p> Signup and view all the answers

Which scenario is least likely to be considered when assessing robustness metrics?

<p>User interface responsiveness (B)</p> Signup and view all the answers

The main cybersecurity challenge addressed by intrusion detection systems involves which aspect?

<p>Detecting unauthorized access attempts (C)</p> Signup and view all the answers

Flashcards

All-Optical Networks (AON)

Fiber-based networks (FTTx) offering high bandwidth and low latency for various services.

Unified Transport Network (UTN)

High-bandwidth, low-latency network supporting premium lines, DCI, IP links, and mobile fronthaul.

IP Integrated Transport Network

Network using Flex-E and SRv6 for network slicing, IP RAN, broadband transport, and mobile backhaul.

Passive Optical Network (PON)

Full-service access network using Comb PON and Flex PON for various applications.

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Software-Defined Networking (SDN)

Intelligent network control for on-demand bandwidth, cloud, and value-added applications.

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Traffic Analysis Attack

Attackers gain information by analyzing ciphertext and plaintext length.

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Eavesdropping

Secretly listening to network traffic to obtain sensitive information.

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Spoofing Attack

Acquiring privileges by pretending to be a more trusted user or process.

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Denial-of-Service (DoS) Attack

Attack that prevents users or organizations from accessing network resources.

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QoS Degradation

Attack that reduces the quality of service experienced by users.

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Robust System

A system that functions correctly even with external issues or stress.

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Error Type

How an error is implemented, like corrupting data or causing random input.

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Error Location

Where the error is injected, not where it results.

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Error Timing

When an error happens and how long it lasts, split into injection time and duration.

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Service Disruption Attack

An attack that degrades or denies service in an all-optical network.

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Fiber Attacks

A method of service disruption in all-optical networks that involves attacking fibers.

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Workload Selection

Choosing what a system is doing during testing to ensure good performance and robustness.

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SUT

System Under Test

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Optical Amplifier Attacks

An attack method that targets optical amplifiers in all-optical networks to disrupt service.

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Intrusion Detection System (IDS)

A system that identifies and responds to attacks.

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Tapping Attacks

Attack types that include eavesdropping and traffic analysis in all-optical networks.

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Crosstalk Attack

An attack targeting wavelength switches in all-optical networks. It affects connections on the same wavelength.

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Intrusion Response System (IRS)

Applies countermeasures to stop and address attacks.

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Common intrusion solutions

Firewalls, access control, and cryptography.

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Robustness

A system's ability to handle external disturbances.

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Traditional Firewall Limitations

Can't detect internal attacks, like flooding or port scans. Only looks at network boundaries.

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Evaluation Goals

Clearly stated objectives for evaluating a system.

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Target System

The entity being evaluated for robustness.

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OS-Application Interface

API providing services (s1, s2, ... ss) used by applications.

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OS-Driver Interface

Interface that OS provides for allowing drivers to use it.

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Study Notes

All-Optical Networks (AON)

  • Also known as fiber to the x (FTTx)
  • Includes fiber to the site, building, and home
  • Full-service areas and unified optical cable networks are foundational
  • Coordinate 2B, 2C, and 2H services
  • Unified Transport Network (UTN) provides high bandwidth, low latency, and multiple services
  • Can be used for premium private lines, data center interconnect (DCI), IP links, and mobile network fronthaul
  • IP integrated transport network features Flex-E and IPv6 Segment Routing (SRv6)
  • Used for IP RAN private lines, broadband transport, and mobile backhaul
  • Passive Optical Network (PON) enables full-service access
  • Widely recognized for PON VPN, Internet private lines, regional networking, smart homes, video surveillance, and industrial control
  • Used in public areas and buildings (harbors, campuses, hotels, airports, commercial buildings, train/bus stations)
  • Software-defined networking (SDN) supports intelligent, on-demand bandwidth selection, clouds, value-added applications, and after-sales services
  • Leverages differentiated competitive advantages of network operators
  • Utilized in underlay mode for network control

Possible Attacks on Networks

  • Broadly categorized into five areas
  • Traffic Analysis Attack: Ciphertext length reveals plaintext length, allowing attackers to tap fibers and gather information
  • Data Delay: Attackers intercept data for later use
  • Spoofing: Attackers gain privileges, capabilities, and trust by impersonating privileged users or processes
  • Includes masquerading and Trojan horse attacks
  • Service Denial: Deprives users or organizations of services

All-Optical Network Attack Types

  • Service Disruption Attack includes service denial and quality of service (QoS) degradation
  • Methods: Fiber attacks, optical amplifier attacks
  • Tapping attacks include eavesdropping and traffic analysis attacks
  • Cross-Talk Attack Monitoring and Localization: Affects normal connections on the same wavelength

Monitoring Methods

  • Power Detection: Records power increases or decreases with respect to expected values
  • Optical Spectral Analyzers (OSAs): Display the spectrum of an optical signal
  • Bit Error Rate Testers (BERTs): Compare received patterns with sent patterns
  • Pilot tones: Travel along communication links

Robustness

  • Ability of a system to withstand external perturbations

Evaluation Goals

  • Clearly defining goals simplifies evaluation steps
  • Goals are typically set by the person or company ordering the study

Target System

  • Entity under test

POSIX Interface

  • API used as a benchmark target and related to robustness parameters in input and stress testing

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Description

This quiz explores the key concepts of All-Optical Networks (AON), including their applications in various settings such as homes, businesses, and public spaces. You will learn about technologies like Passive Optical Network (PON) and Unified Transport Network (UTN), as well as the integration of features like IPv6 and software-defined networking (SDN). Test your understanding of how these networks facilitate high bandwidth and low latency services.

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