Ericsson Technical Certification Program (ETCP) — Questions and Answers

Question 1: Which Ericsson router platform is designed for high-capacity IP/MPLS core network deployments?

SSR 8000
SEIL X4
Ericsson Router 6000 (Correct answer)
Smart Edge 6000

Correct answer: Ericsson Router 6000

The Ericsson Router 6000 series is purpose-built for high-capacity core and edge IP/MPLS deployments.

Question 2: What is the primary advantage of using SR-MPLS over traditional LDP in Ericsson transport networks?

Lower physical layer bandwidth consumption
Native support for IPv6 only
Higher encryption strength
Simplified control plane with source-based routing and no per-path state in transit nodes (Correct answer)

Correct answer: Simplified control plane with source-based routing and no per-path state in transit nodes

SR-MPLS eliminates the need for LDP or RSVP-TE signaling state in transit nodes, reducing control plane complexity while enabling traffic engineering.

Question 3: What does the term 'Fast Reroute (FRR)' mean in Ericsson MPLS transport?

A hardware mechanism for forwarding at line rate
A technique for accelerating packet queuing
A method to quickly switch to a pre-computed backup path when a failure is detected (Correct answer)
A protocol for rapid BGP convergence

Correct answer: A method to quickly switch to a pre-computed backup path when a failure is detected

MPLS Fast Reroute provides sub-50ms failure recovery by switching to a pre-established backup LSP upon detecting a link or node failure.

Question 4: Narrow banding & Charger / Taurus radio range problems If an officer turns on the radio and Ch 2 says it needs to be programmed before_?

Point to point, January 1
Mutual aid, January 1 (Correct answer)
Mutual aid, December 31

Correct answer: Mutual aid, January 1

For Charger/Taurus radios experiencing narrow banding and range problems, if an officer turns on the radio and Channel 2 displays "Mutual aid," it indicates that the radio needs to be reprogrammed before January 1. This specific message and deadline are critical for ensuring the radio's compliance with narrow banding regulations and maintaining proper functionality.

Question 5: What is the maximum modulation order commonly supported by modern Ericsson MINI-LINK high-capacity links?

1024-QAM
64-QAM
256-QAM
4096-QAM (Correct answer)

Correct answer: 4096-QAM

Modern Ericsson MINI-LINK supports up to 4096-QAM (12 bits/symbol) under strong signal conditions to maximize spectral efficiency and throughput.

Question 6: Which Ericsson product line is used to provide microwave backhaul connectivity for mobile sites?

Ericsson MSC-S
Ericsson MINI-LINK (Correct answer)
Ericsson Smart Services Router
Ericsson RBS 6000

Correct answer: Ericsson MINI-LINK

Ericsson MINI-LINK is the portfolio of microwave backhaul solutions used to connect base stations to the core transport network.

Question 7: Dimensions of Cloud Computing include

Compliance
All of the above (Correct answer)
Legal or Contractual Issues
Security and Privacy

Correct answer: All of the above

Cloud computing involves several critical dimensions beyond just the technical infrastructure. Security and privacy are fundamental to protect user data and systems, while compliance ensures adherence to various industry standards and governmental regulations. Legal and contractual issues define the responsibilities and liabilities between cloud providers and their customers, making all these factors essential considerations for successful cloud adoption and management.

Question 8: Which Ericsson feature allows a single physical interface to carry multiple logical connections with separate SLAs in transport networks?

Port Mirroring
Link Aggregation (LAG)
Hierarchical QoS (H-QoS) (Correct answer)
Jumbo Frames

Correct answer: Hierarchical QoS (H-QoS)

Hierarchical QoS (H-QoS) applies multi-level scheduling policies so different services on the same interface receive their guaranteed bandwidth and latency treatment.

Question 9: What does PDCP (Packet Data Convergence Protocol) do in Ericsson's 5G RAN stack?

Maps logical channels to transport channels
Manages HARQ retransmissions on the air interface
Allocates spectrum resources to users
Performs header compression, ciphering, integrity protection, and in-sequence delivery for data packets (Correct answer)

Correct answer: Performs header compression, ciphering, integrity protection, and in-sequence delivery for data packets

PDCP provides IP header compression (ROHC), encryption, integrity protection, and in-sequence delivery for both control and user plane data in the 5G RAN.

Question 10: What is the capacity benefit of multiband microwave in Ericsson MINI-LINK deployments?

The number of physical antenna mounts required is reduced to one
Optical fiber fallback is automatically provided
Frequency coordination is no longer needed
Multiple frequency bands are used simultaneously on the same link to aggregate higher total capacity (Correct answer)

Correct answer: Multiple frequency bands are used simultaneously on the same link to aggregate higher total capacity

Multiband microwave aggregates capacity from two or more frequency bands (e.g., 18 GHz + E-band) on the same link, multiplying available throughput beyond what any single band can deliver.

Question 11: Which Ericsson 5G product integrates the baseband and radio into a single outdoor unit?

Ericsson MINI-LINK PT
Ericsson Radio Dot
Ericsson Integrated Access and Backhaul (IAB) node
Ericsson AIR (Active Intelligent Radio) series (Correct answer)

Correct answer: Ericsson AIR (Active Intelligent Radio) series

Ericsson's AIR (Active Intelligent Radio) units integrate massive MIMO antenna arrays with radio transceivers and may include baseband processing in a compact outdoor form factor.

Question 12: What does Space Diversity provide in an Ericsson microwave transmission deployment?

It uses two vertically separated antennas to mitigate multipath and diffraction fading (Correct answer)
It automatically increases transmit power during rain fade events
It enables communication links to low-earth orbit satellites
It allows frequency reuse in adjacent microwave sectors

Correct answer: It uses two vertically separated antennas to mitigate multipath and diffraction fading

Space Diversity separates two receive antennas vertically so that multipath fading rarely affects both simultaneously, and a combiner selects or combines the stronger signal.

Question 13: How does Ericsson Network Manager (ENM) support MINI-LINK microwave node management?

ENM replaces IP routing functionality in microwave networks
ENM manages only 5G NR radio units and has no microwave support
ENM is used exclusively for core network packet gateway management
ENM provides unified FCAPS management (fault, configuration, accounting, performance, security) for MINI-LINK nodes alongside RAN and core elements (Correct answer)

Correct answer: ENM provides unified FCAPS management (fault, configuration, accounting, performance, security) for MINI-LINK nodes alongside RAN and core elements

ENM's multi-technology support includes MINI-LINK nodes, enabling operators to manage the entire network — RAN, transport, and core — from a single platform.

Question 14: What does ATPC stand for in Ericsson microwave transmission systems?

Automatic Traffic Priority Control
Automatic Transmit Power Control (Correct answer)
Adaptive Transmission Protocol Configuration
Advanced Topology Path Control

Correct answer: Automatic Transmit Power Control

ATPC (Automatic Transmit Power Control) reduces transmit power during clear conditions to minimize interference and save energy, increasing power only when the link fades.

Question 15: What does Ericsson's OSS (Operations Support System) primarily enable operators to do?

Bill subscribers for services
Manage retail store inventory
Develop mobile applications
Monitor, configure, and manage network elements across the RAN and core (Correct answer)

Correct answer: Monitor, configure, and manage network elements across the RAN and core

Ericsson's OSS provides centralized tools for network monitoring, fault management, configuration management, and performance management across the operator's infrastructure.

Question 16: What is Massive MIMO in the context of Ericsson's 5G radio deployments?

A system with a large number of antenna elements enabling multi-user spatial multiplexing and beamforming (Correct answer)
A frequency aggregation method for carrier aggregation
A modulation scheme for millimeter-wave frequencies
A technique using a single large antenna element for wide coverage

Correct answer: A system with a large number of antenna elements enabling multi-user spatial multiplexing and beamforming

Massive MIMO uses dozens to hundreds of antenna elements to form precise beams toward multiple users simultaneously, dramatically increasing spectral efficiency.

Question 17: What is the primary purpose of MPLS Traffic Engineering (TE) in Ericsson transport networks?

Managing VLAN segmentation
Optimizing bandwidth utilization across network paths (Correct answer)
Encrypting data in transit
Providing IP address assignment

Correct answer: Optimizing bandwidth utilization across network paths

MPLS-TE allows operators to optimize bandwidth by directing traffic along specific paths rather than relying solely on shortest-path routing.

Question 18: Which Ericsson product family is the primary platform for microwave backhaul?

Ericsson MSC-S
Ericsson RBS 6000
Ericsson SGSN-MME
MINI-LINK (Correct answer)

Correct answer: MINI-LINK

Ericsson's MINI-LINK product family is specifically designed and marketed for microwave backhaul applications.

Question 19: What is the role of Ericsson's Service Assurance in an OSS context?

Correlating network faults and performance degradations to their impact on end-to-end services and SLAs (Correct answer)
Issuing subscriber invoices
Allocating IP address blocks
Managing physical fiber cable runs

Correct answer: Correlating network faults and performance degradations to their impact on end-to-end services and SLAs

Service Assurance translates raw network alarms and performance data into service-level impact views, helping operators prioritize issues based on customer SLA impact.

Question 20: Which routing protocol is most commonly used for inter-domain routing in Ericsson transport network deployments?

OSPF
IS-IS
RIP
BGP (Correct answer)

Correct answer: BGP

BGP (Border Gateway Protocol) is the standard inter-domain routing protocol used between autonomous systems in transport networks.

Question 21: What does Ericsson's Smart MSE (Microwave Site Equipment) concept provide?

A unified platform that integrates microwave radio and IP routing/switching functions in a single node (Correct answer)
A cloud-based radio access controller for 5G NR
A standalone antenna alignment and calibration tool
A dedicated cloud server for OSS performance management

Correct answer: A unified platform that integrates microwave radio and IP routing/switching functions in a single node

Smart MSE consolidates microwave radio transport and IP packet switching into one platform, reducing site footprint and simplifying operations.

Question 22: What is the function of RSVP-TE in Ericsson MPLS networks?

Monitors link utilization
Provides dynamic host configuration
Manages subscriber authentication
Signals and reserves resources for traffic-engineered LSPs (Correct answer)

Correct answer: Signals and reserves resources for traffic-engineered LSPs

RSVP-TE (Resource Reservation Protocol - Traffic Engineering) signals LSP setup and reserves bandwidth resources along the path.

Question 23: In Ericsson IP transport, what is a VRF used for?

Encrypting inter-node traffic
Creating separate virtual routing tables for different customers or services (Correct answer)
Managing physical port configurations
Measuring packet loss on a link

Correct answer: Creating separate virtual routing tables for different customers or services

A VRF (Virtual Routing and Forwarding) instance creates an isolated routing table, allowing multiple customers or services to share the same physical infrastructure.

Question 24: In Ericsson transport networks, what does OAM stand for?

Optical Amplifier Module
Outbound Aggregation Mechanism
Open Access Management
Operations, Administration, and Maintenance (Correct answer)

Correct answer: Operations, Administration, and Maintenance

OAM (Operations, Administration, and Maintenance) encompasses tools and protocols for monitoring, fault detection, and management of network services.

Question 25: What does Network Slicing allow operators to do in Ericsson's 5G core?

Split base station software into microservices
Physically separate antenna sectors
Allocate dedicated spectrum per user
Create multiple logical networks on shared infrastructure, each with tailored SLAs (Correct answer)

Correct answer: Create multiple logical networks on shared infrastructure, each with tailored SLAs

Network Slicing enables operators to instantiate multiple virtual networks (slices) on one physical 5GC, each customized for different services like eMBB, URLLC, or mMTC.

Question 26: Which of the following should you NOT do with data whilst at work?

Record ‘personal data’ for your own use outside of work
A and D (Correct answer)
Access ‘personal data’ that you do not need for your work
Keep ‘sensitive data’ after being given permission by the individual concerned
Use someone’s ‘personal data’ to complete your work without asking permission from the individual

Correct answer: A and D

Data protection regulations strictly govern how personal and sensitive data can be handled. Accessing 'personal data' not needed for work (A) is a breach of the 'need-to-know' principle, and recording 'personal data' for personal use outside of work (D) is a severe misuse and violation of privacy and data security policies. Both actions are explicitly prohibited to prevent unauthorized access, disclosure, and potential misuse of information.

Question 27: Cloud providers ensure that _________via the cloud are secure by implementing testing and acceptance procedures for outsourced or packaged application code.

Applications available as a service (Correct answer)
Infrastructure as a service
None of these
Platform as a service

Correct answer: Applications available as a service

Cloud providers offering 'Applications available as a service' (SaaS) are directly responsible for the security of those applications. This means they must implement rigorous testing and acceptance procedures for all application code, whether developed internally or outsourced, to identify and mitigate vulnerabilities. This ensures that the software provided to customers is secure and reliable.

Question 28: What is the primary advantage of a hybrid microwave solution that combines fiber and wireless links?

Provides path diversity for increased resilience and aggregate capacity (Correct answer)
Simplifies frequency coordination requirements
Eliminates all fiber infrastructure costs
Reduces end-to-end latency below that of pure fiber

Correct answer: Provides path diversity for increased resilience and aggregate capacity

Hybrid microwave bonds a fiber path and a wireless path, so if one path degrades the other compensates, improving both availability and total capacity.

Question 29: Which MINI-LINK product series is designed for high-capacity backbone and aggregation applications?

MINI-LINK 6000 (Correct answer)
MINI-LINK Access Point
MINI-LINK 100
MINI-LINK Lite

Correct answer: MINI-LINK 6000

The MINI-LINK 6000 series targets backbone and aggregation layers requiring high capacity, advanced QoS, and carrier-grade Ethernet transport.

Question 30: Which standard or set of standards defines Ethernet OAM (Operations, Administration, and Maintenance) used in Ericsson microwave networks?

IEEE 802.3ab (1000BASE-T)
ITU-T G.652 fiber characteristics
IEEE 802.1ag (CFM) and ITU-T Y.1731 (Correct answer)
SONET/SDH G.803 framing

Correct answer: IEEE 802.1ag (CFM) and ITU-T Y.1731

IEEE 802.1ag defines Connectivity Fault Management (CFM) and ITU-T Y.1731 extends it with performance monitoring, together forming the standard Ethernet OAM suite.

Ericsson Technical Certification Program (ETCP)

The ETCP validates technical competence in Ericsson telecommunications technologies, covering microwave and transmission solutions, IP and transport networks, and packet core and service continuity for ICT engineers and solution architects.

Questions

35 min

Time Limit

70%

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