Telecom Security Test

The Telecom Security test evaluates candidates’ ability to protect telecom systems from threats, helping employers identify skilled professionals to ensure secure, compliant, and resilient communications.

Available in

  • English

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10 Skills measured

  • Telecom Security Fundamentals & Threat Landscape
  • SS7/MAP/CAP Security (Legacy Interconnect)
  • GPRS/EPC & GTP Security (GTP-C/GTP-U)
  • LTE/IMS/VoLTE/VoWiFi & Diameter/SIP Security
  • 5G SBA Security (UDM/UDR/AUSF, SEPP, SCP)
  • Access, AAA & Device Identity (RADIUS/EAP, SIM/eSIM/M2M/IoT)
  • O&M/OSS/BSS, Interconnect & Lawful Interception (LI)
  • Fraud & Abuse Management (SMS/IRSF/SIMbox/Grey Routes)
  • SOC, SIEM, Incident Response & Adversary Simulation
  • Cloud-Native Telco Security (NFV/SDN/CNFs, K8s/NCS, MEC & Slicing)

Test Type

Software Skills

Duration

30 mins

Level

Intermediate

Questions

25

Use of Telecom Security Test

The Telecom Security test is designed to evaluate a candidate’s ability to safeguard telecommunications systems against evolving threats in today’s highly connected world. As telecom infrastructure underpins critical business operations, ensuring its confidentiality, integrity, and availability is essential for both service providers and organizations relying on secure communication networks.

This assessment is particularly valuable when hiring professionals responsible for managing, securing, and monitoring telecom environments. It helps employers identify candidates who not only understand the technical aspects of network security but also demonstrate the ability to anticipate risks, comply with regulations, and apply best practices to protect sensitive data and communication channels.

The test covers a broad range of skills required in telecom security roles, including knowledge of network protocols, authentication and access controls, encryption practices, risk management, and threat detection. It also assesses awareness of compliance requirements and the ability to implement robust defense strategies against cyberattacks, insider threats, and service disruptions.

By using this test as part of the hiring process, organizations can confidently evaluate whether candidates possess the essential expertise to safeguard telecom infrastructure, reduce vulnerabilities, and ensure resilient and trusted communication systems.

Skills measured

Covers the foundations of telecom networks (2G–5G) and the evolving security landscape. Explains threat actors (fraudsters, cybercriminals, state-sponsored attackers), attack surfaces (access, core, interconnect, devices), and core concepts like CIA triad, risk management, SLAs, and regulatory drivers (ETSI, GSMA FS.11/FS.19). Establishes awareness of why telecom networks are highly attractive targets.

Deep exploration of vulnerabilities in SS7-based signaling (MAP, CAP, ISUP). Covers location tracking, SMS/call interception, call rerouting, DoS on signaling transfer points (STPs), GT screening, MAPsec/TCAPsec, and how SS7 firewalls protect against industrialized exploitation. Focuses on fraud schemes exploiting legacy protocols still in use globally.

Examines GPRS/Evolved Packet Core security and threats on GTP tunnels (control/user plane). Includes PDP context manipulation, TEID spoofing, reflection/amplification attacks, user-plane data injection, DPI inspection, GTP firewalling, and lawful packet handling. Emphasizes inter-PLMN roaming risks (S8/Gn/Gp) and end-user data confidentiality.

Focused on LTE and IMS-era security: Diameter protocol weaknesses (overload, downgrade), SIP-based VoLTE threats (toll fraud, session hijacking), and VoWiFi challenges. Explains the role of DRAs, SBCs, TLS/SRTP, overload control, lawful interception in IMS, and risk analysis for CSFB/SRVCC transitions. Stresses fraud detection integration into IMS signaling.

Covers the 5G Service-Based Architecture and NF-to-NF security. Includes SUPI/SUCI privacy, EAP-AKA’, OAuth2/JWT, mTLS, API exposure risks, and inter-PLMN protection via SEPP (N32). Addresses SCP for mediation, schema validation, rate limiting, and Zero-Trust adoption in 5G cores. Explains why 5G SBA introduces both flexibility and new vulnerabilities.

Explores access network security: Wi-Fi offload (EAP-SIM/AKA/AKA’), RADIUS protocol vulnerabilities, SIM/eSIM security, and IoT/M2M device authentication. Discusses rogue AP attacks, credential theft, GAN/UMA exposure, IoT botnets, and secure onboarding/attestation for billions of IoT endpoints.

Focuses on security of telecom management and business systems. Covers OSS/BSS hardening (SNMPv3, SSH, RBAC), interconnect/IPX exposure, lawful interception (architecture, compliance, data handling), and preventing LI interface abuse. Addresses insider threats, supply chain risks, and securing critical telecom operations infrastructure.

Detailed coverage of fraud schemes: SMS grey routes, SIMbox detection, IRSF, flash calling, OTT bypass, and CLI spoofing. Explains fraud management systems (FMS), detection workflows, ML/analytics for anomaly detection, and revenue recovery. Emphasizes balancing fraud detection with low false positives to avoid service disruption.

Explains how telecom SOCs monitor, detect, and respond to threats. Covers signaling-aware SIEM rules, automated playbooks, containment, RCA, and adversary simulation (red teaming, fuzzing). Includes KPIs (MTTD/MTTR), industrial-scale vulnerability scanning, and forensic analysis of signaling traces/logs after incidents.

Focuses on cloud-native security for telecom: NFV/SDN protection, Kubernetes RBAC/PSA, supply-chain security (SBOM, image signing), SR-IOV/DPDK isolation, and MEC edge vulnerabilities. Covers slice isolation (management/control/user plane), 5G multi-cluster resilience, Zero-Trust orchestration, and compliance for cloudized telecom cores.

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Recruiter efficiency

6x

Recruiter efficiency

Decrease in time to hire

55%

Decrease in time to hire

Candidate satisfaction

94%

Candidate satisfaction

Subject Matter Expert Test

The Telecom Security Subject Matter Expert

Testlify’s skill tests are designed by experienced SMEs (subject matter experts). We evaluate these experts based on specific metrics such as expertise, capability, and their market reputation. Prior to being published, each skill test is peer-reviewed by other experts and then calibrated based on insights derived from a significant number of test-takers who are well-versed in that skill area. Our inherent feedback systems and built-in algorithms enable our SMEs to refine our tests continually.

Why choose Testlify

Elevate your recruitment process with Testlify, the finest talent assessment tool. With a diverse test library boasting 3000+ tests, and features such as custom questions, typing test, live coding challenges, Google Suite questions, and psychometric tests, finding the perfect candidate is effortless. Enjoy seamless ATS integrations, white-label features, and multilingual support, all in one platform. Simplify candidate skill evaluation and make informed hiring decisions with Testlify.

Related tests

Top five hard skills interview questions for Telecom Security

Here are the top five hard-skill interview questions tailored specifically for Telecom Security. These questions are designed to assess candidates’ expertise and suitability for the role, along with skill assessments.

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Why this matters?

Tests the candidate’s practical understanding of telecom-specific vulnerabilities and countermeasures.

What to listen for?

Awareness of encryption, intrusion detection/prevention, traffic monitoring, redundancy, and proactive threat management strategies.

Why this matters?

Demonstrates knowledge of identity management and access restrictions, critical for safeguarding telecom infrastructure.

What to listen for?

References to multi-factor authentication, role-based access, least-privilege principles, and auditing practices.

Why this matters?

Highlights understanding of regulatory requirements and the ability to align security measures with compliance.

What to listen for?

Experience implementing controls, documentation practices, ongoing audits, and adaptability to evolving compliance demands.

Why this matters?

Evaluates real-world problem-solving, decision-making, and incident response capabilities.

What to listen for?

Clear explanation of risk assessment, root-cause analysis, chosen mitigation steps, and measurable outcomes.

Why this matters?

Assesses forward-thinking, adaptability, and awareness of evolving telecom security trends.

What to listen for?

Insights into 5G/6G security, IoT threats, cloud-based telecom risks, and strategies like zero-trust architecture and AI-driven monitoring.

Frequently asked questions (FAQs) for Telecom Security Test

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The Telecom Security test is an assessment designed to evaluate a candidate’s knowledge and skills in securing telecommunications networks, systems, and infrastructure against evolving cyber threats and vulnerabilities.

Employers can use this test during the recruitment process to objectively assess candidates’ technical expertise, problem-solving ability, and awareness of security best practices before making hiring decisions.

Network Security Engineer Cybersecurity Specialist Information Security Analyst Security Operations Center (SOC) Analysts

Telecom Security Fundamentals & Threat Landscape SS7/MAP/CAP Security (Legacy Interconnect) GPRS/EPC & GTP Security (GTP-C/GTP-U) LTE/IMS/VoLTE/VoWiFi & Diameter/SIP Security 5G SBA Security (UDM/UDR/AUSF, SEPP, SCP) Access, AAA & Device Identity (RADIUS/EAP, SIM/eSIM/M2M/IoT) O&M/OSS/BSS, Interconnect & Lawful Interception (LI) Fraud & Abuse Management (SMS/IRSF/SIMbox/Grey Routes) SOC, SIEM, Incident Response & Adversary Simulation Cloud-Native Telco Security (NFV/SDN/CNFs, K8s/NCS, MEC & Slicing)

With telecom systems forming the backbone of global communication, this test ensures employers hire professionals who can safeguard networks, protect sensitive data, and ensure secure, reliable connectivity.

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