Ericsson Technical Certification Program (ETCP) — Questions and Answers

Question 1: What is the function of the SMSF (Short Message Service Function) in Ericsson's 5G core?

Stores multimedia message content
Handles SMS delivery for 5G subscribers via the SBI (Correct answer)
Manages NAS (Non-Access Stratum) mobility procedures
Provides inter-frequency handover for NR

Correct answer: Handles SMS delivery for 5G subscribers via the SBI

The SMSF integrates SMS services into the 5GC by interfacing with the AMF and SMS-SC to deliver text messages to 5G NR subscribers.

Question 2: Which technology does Ericsson use for network synchronization in transport networks to support LTE/5G timing requirements?

SNTP
PTP (IEEE 1588) (Correct answer)
TRILL
NTP

Correct answer: PTP (IEEE 1588)

PTP (Precision Time Protocol, IEEE 1588) provides the sub-microsecond synchronization accuracy required by LTE and 5G base stations.

Question 3: What is the function of Ericsson's License Manager within ENM?

Generates invoices for managed service customers
Controls the activation and tracking of feature licenses on Ericsson network elements (Correct answer)
Manages software development licenses for Ericsson developers
Negotiates supplier contracts for hardware components

Correct answer: Controls the activation and tracking of feature licenses on Ericsson network elements

License Manager in ENM provides centralized control over network element capacity and feature licenses, ensuring compliance and enabling remote license activation.

Question 4: Which standard or set of standards defines Ethernet OAM (Operations, Administration, and Maintenance) used in Ericsson microwave networks?

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

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.

Question 5: What does XPIC stand for in Ericsson MINI-LINK microwave systems?

Cross-Path Interference Control
Cross-Polarization Interference Cancellation (Correct answer)
Cross-Polarization Interference Correction
Cross-Path Isolation Circuit

Correct answer: Cross-Polarization Interference Cancellation

XPIC stands for Cross-Polarization Interference Cancellation, enabling both polarizations on the same frequency to double spectral efficiency.

Question 6: What does QoS DSCP marking do in an Ericsson IP transport network?

Encrypts headers for security
Compresses packet payloads
Assigns VLANs to traffic flows
Marks packets to indicate their priority for handling (Correct answer)

Correct answer: Marks packets to indicate their priority for handling

DSCP (Differentiated Services Code Point) marks packets in the IP header so network nodes can apply appropriate priority treatment.

Question 7: What protocol does Ericsson ENM use to communicate with YANG-based network elements for configuration?

HTTP/1.1
TFTP
SNMP v2c
NETCONF (Correct answer)

Correct answer: NETCONF

NETCONF (Network Configuration Protocol) combined with YANG data models is the modern standard for programmatic NE configuration used in ENM.

Question 8: Which Ericsson product line is used to provide microwave backhaul connectivity for mobile sites?

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

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 9: What does 'CUPS' (Control and User Plane Separation) enable in Ericsson's evolved packet core?

Physically separating the MME from the HSS for redundancy
Separating the RAN control plane from the transport layer
Isolating billing data from subscriber management data
Separating SGW and PGW control plane functions from their user plane functions, allowing them to scale independently (Correct answer)

Correct answer: Separating SGW and PGW control plane functions from their user plane functions, allowing them to scale independently

CUPS decouples the control plane (SGW-C, PGW-C) from the user plane (SGW-U, PGW-U), enabling the user plane to be distributed closer to the network edge while control remains centralized.

Question 10: What is the primary purpose of MPLS Traffic Engineering (TE) in Ericsson transport networks?

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

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 11: In Ericsson's EPC, what is the Gx interface used for?

Providing authentication between MME and HSS
Carrying policy and charging control messages between the PCRF and PGW (PCEF) (Correct answer)
Synchronizing time between core nodes
Carrying user plane data between SGW and PGW

Correct answer: Carrying policy and charging control messages between the PCRF and PGW (PCEF)

The Gx interface is a Diameter-based interface between the PCRF and the PGW's PCEF, used to push QoS rules and charging policies per session.

Question 12: In Ericsson IP transport, what is a VRF used for?

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

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

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

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 14: Which encapsulation is used in Ericsson's Carrier Ethernet services to transport Layer 2 frames over an MPLS core?

Pseudowire (PWE3) (Correct answer)
IPsec tunnel
VXLAN
GRE

Correct answer: Pseudowire (PWE3)

Pseudowire (PWE3) encapsulates Layer 2 frames inside MPLS labels to transport Ethernet, ATM, or TDM services over an IP/MPLS backbone.

Question 15: In Ericsson MINI-LINK terminology, what does an 'all-outdoor' configuration mean?

Only the antenna is outdoors while all electronics are indoors
The system must be installed in rural areas only
The system operates exclusively above 20 GHz
All radio, modem, and switching functions are integrated into a single outdoor unit requiring no separate indoor equipment (Correct answer)

Correct answer: All radio, modem, and switching functions are integrated into a single outdoor unit requiring no separate indoor equipment

An all-outdoor MINI-LINK unit integrates radio, modem, and switching into one weatherproof outdoor unit, eliminating the need for an indoor unit and IF cable.

Question 16: Which Ericsson feature allows a single physical interface to carry multiple logical connections with separate SLAs in transport networks?

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

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 17: In Ericsson transport, what is the role of a Route Reflector in BGP?

To balance load between WAN links
To translate between IPv4 and IPv6
To assign MPLS labels to packets
To reduce the number of BGP sessions required in an AS (Correct answer)

Correct answer: To reduce the number of BGP sessions required in an AS

A Route Reflector allows BGP route propagation within an AS without requiring a full mesh of iBGP sessions between all routers.

Question 18: What frequency range defines the E-band used in high-capacity Ericsson MINI-LINK deployments?

71–86 GHz (Correct answer)
38–42 GHz
6–11 GHz
18–23 GHz

Correct answer: 71–86 GHz

E-band occupies 71–86 GHz, offering large channel bandwidths (up to 2 GHz) that enable multi-gigabit backhaul over short distances.

Question 19: What does Space Diversity provide in an Ericsson microwave transmission deployment?

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

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

IS-IS
OSPF
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 the term 'PDN Connection' refer to in Ericsson's LTE/EPC architecture?

The logical association between a UE and an external Packet Data Network (e.g., internet), anchored at the PGW (Correct answer)
An inter-core interface between two operators' EPC nodes
A dedicated signaling link between MME and HSS
A physical fiber connection between the PGW and internet exchange

Correct answer: The logical association between a UE and an external Packet Data Network (e.g., internet), anchored at the PGW

A PDN Connection is the end-to-end logical path from the UE through the EPC to an external data network, identified by an APN and maintained as long as the UE is active.

Question 22: What does 'UPF chaining' allow in Ericsson's 5G user plane architecture?

Routing voice and data to separate UPF instances by APN
Synchronizing UPF clock sources across data centers
Linking multiple UPFs in sequence so traffic passes through different processing functions (e.g., traffic inspection, NAT, firewall) in a service function chain (Correct answer)
Bonding multiple physical UPF servers for higher throughput

Correct answer: Linking multiple UPFs in sequence so traffic passes through different processing functions (e.g., traffic inspection, NAT, firewall) in a service function chain

UPF chaining (via Service Function Chaining) routes packets through a sequence of UPF instances or VNFs, each applying a specific processing function before forwarding.

Question 23: What is the function of Carrier Ethernet transport in Ericsson microwave backhaul?

It enables satellite communication as a fallback path
It provides standardized Ethernet services with defined SLAs, OAM, and protection across the backhaul network (Correct answer)
It manages CPU load on remote radio units
It replaces all synchronization mechanisms in the backhaul

Correct answer: It provides standardized Ethernet services with defined SLAs, OAM, and protection across the backhaul network

Carrier Ethernet defines service types (E-Line, E-LAN, E-Tree), SLA parameters, OAM functions, and protection mechanisms to deliver carrier-grade reliability over Ethernet.

Question 24: Which synchronization standard provides phase and time synchronization required by LTE and 5G in Ericsson microwave backhaul?

SONET OC-3
NTP v4
SDH STM-1
IEEE 1588v2 (PTP) (Correct answer)

Correct answer: IEEE 1588v2 (PTP)

IEEE 1588v2 (Precision Time Protocol) delivers sub-microsecond phase/time accuracy needed for LTE TDD and 5G NR synchronization.

Question 25: What is the function of RSVP-TE in Ericsson MPLS networks?

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

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

A modulation scheme for millimeter-wave frequencies
A frequency aggregation method for carrier aggregation
A system with a large number of antenna elements enabling multi-user spatial multiplexing and beamforming (Correct answer)
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 27: Which protocol provides link-level failure detection in milliseconds in Ericsson IP transport, often used alongside OSPF or BGP?

LACP
LLDP
STP
BFD (Bidirectional Forwarding Detection) (Correct answer)

Correct answer: BFD (Bidirectional Forwarding Detection)

BFD provides rapid sub-second failure detection between directly connected or remote routing peers, enabling faster protocol convergence.

Question 28: 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
Managing physical fiber cable runs
Allocating IP address blocks

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

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

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 30: Cloud providers have _ and __plans in place to ensure that service can be maintained in case of a disaster or an emergency and that any data lost will be recovered.

Business continuity and risk management
None of these
Business continuity and data recovery (Correct answer)
Business continuity and project management

Correct answer: Business continuity and data recovery

Cloud providers must have robust strategies in place to ensure continuous service availability and data integrity. Business continuity plans outline procedures to maintain essential functions during disruptions, while data recovery plans detail how lost data can be restored after an incident. These two plans are crucial for minimizing downtime and preventing permanent data loss, assuring customers of service resilience and data safety.

Question 31: In Ericsson's 5G core (5GC), what function handles session management for user data bearers?

NRF
UPF
SMF (Correct answer)
AMF

Correct answer: SMF

The SMF (Session Management Function) establishes, modifies, and releases PDU sessions and assigns IP addresses to UEs in the 5G core.

Question 32: Which standard governs Synchronous Ethernet (SyncE) messaging used for frequency synchronization in Ericsson MINI-LINK?

MPLS-TP signaling
OSPF area synchronization
ITU-T G.8264 (ESMC — Ethernet Synchronization Messaging Channel) (Correct answer)
BGP community attributes

Correct answer: ITU-T G.8264 (ESMC — Ethernet Synchronization Messaging Channel)

ITU-T G.8264 defines ESMC, which distributes synchronization quality level (QL) information across Ethernet links to enable frequency-accurate SyncE.

Question 33: In Ericsson's IP/MPLS transport, what does LSP stand for?

Layer Switching Point
Label Switched Path (Correct answer)
Link State Protocol
Logical Service Plane

Correct answer: Label Switched Path

LSP stands for Label Switched Path, the end-to-end path established through an MPLS network for forwarding labeled packets.

Question 34: What is the primary advantage of using SR-MPLS over traditional LDP in Ericsson transport networks?

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

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 35: What is the primary purpose of Adaptive Coding and Modulation (ACM) in a microwave link?

To adjust modulation order and coding rate based on current link conditions (Correct answer)
To manage IP routing table updates
To increase physical antenna aperture
To replace frequency planning entirely

Correct answer: To adjust modulation order and coding rate based on current link conditions

ACM dynamically lowers the modulation order during signal degradation (e.g., rain fade) to maintain link availability at the cost of reduced throughput.

Question 36: In 5G NR, what does 'SSB (Synchronization Signal Block)' enable a UE to do?

Perform call setup signaling with the AMF
Establish a data bearer with the UPF
Detect the cell, acquire time/frequency synchronization, and decode the master information block (MIB) (Correct answer)
Perform RF power calibration

Correct answer: Detect the cell, acquire time/frequency synchronization, and decode the master information block (MIB)

The SSB contains the PSS, SSS, and PBCH, allowing a UE to detect a 5G cell, synchronize its timing and frequency, and read basic system information.

Question 37: What is the capacity benefit of multiband microwave in Ericsson MINI-LINK deployments?

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

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

Simplifies frequency coordination requirements
Eliminates all fiber infrastructure costs
Provides path diversity for increased resilience and aggregate capacity (Correct answer)
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 39: Which of the following should you NOT do with data whilst at 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
Access ‘personal data’ that you do not need for your work
Record ‘personal data’ for your own use outside of work
A and D (Correct answer)

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 40: Which 5G core network function is responsible for authenticating subscribers and managing mobility?

PCF
AUSF
UDM
AMF (Correct answer)

Correct answer: AMF

The AMF (Access and Mobility Management Function) handles UE registration, authentication coordination, and mobility management in the 5GC.

Question 41: In Ericsson's multi-access edge computing (MEC) deployments, where is the UPF typically placed?

At or near the RAN edge (e.g., in the DU/CU site) to minimize latency for local applications (Correct answer)
At the internet exchange point
In the centralized data center only
Co-located with the HSS/UDM for authentication proximity

Correct answer: At or near the RAN edge (e.g., in the DU/CU site) to minimize latency for local applications

For MEC use cases, the UPF is deployed at the RAN edge so that user plane traffic is offloaded locally without traversing the central core, achieving ultra-low latency.

Question 42: What is the role of the RRC (Radio Resource Control) protocol in Ericsson's 5G RAN?

Compressing IP headers for efficient air interface usage
Encrypting the user plane data stream
Scheduling physical layer resource blocks per TTI
Managing UE state (idle/connected/inactive), bearer setup, handover, and system information broadcast (Correct answer)

Correct answer: Managing UE state (idle/connected/inactive), bearer setup, handover, and system information broadcast

RRC runs in the gNB-CU and controls UE state transitions, connection setup, measurement configuration, handover procedures, and system information broadcasting.

Question 43: Dimensions of Cloud Computing include

Legal or Contractual Issues
Compliance
All of the above (Correct answer)
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 44: What does ATPC stand for in Ericsson microwave transmission systems?

Advanced Topology Path Control
Automatic Transmit Power Control (Correct answer)
Adaptive Transmission Protocol Configuration
Automatic Traffic Priority 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 45: 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 46: 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 47: What is the maximum modulation order commonly supported by modern Ericsson MINI-LINK high-capacity links?

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

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 48: How does XPIC improve spectral efficiency in an Ericsson MINI-LINK co-channel dual-polarization deployment?

By allowing simultaneous use of vertical and horizontal polarizations on the same frequency channel (Correct answer)
By doubling transmit power on each polarization
By dynamically switching between frequency bands
By compressing IP packet headers before transmission

Correct answer: By allowing simultaneous use of vertical and horizontal polarizations on the same frequency channel

XPIC cancels interference between the two polarizations, allowing the same frequency channel to carry two independent data streams and effectively doubling capacity.

Question 49: In Ericsson's 5G, what is the LADN (Local Area Data Network) feature?

A low-power access technology for IoT devices
A private network slice for enterprise customers
A PDU session type that gives UEs access to a local data network only when within a specific geographic area (Correct answer)
A link aggregation feature for the N3 interface

Correct answer: A PDU session type that gives UEs access to a local data network only when within a specific geographic area

LADN allows UEs to connect to local data networks (e.g., factory systems) only when physically within the LADN service area, supporting MEC and Industry 4.0 use cases.

Question 50: How does Ericsson Network Manager (ENM) support MINI-LINK microwave node management?

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

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 51: In Ericsson's 5G deployment, what is the midhaul network?

The link between two gNBs for coordinated scheduling
The transport between the core and the internet peering point
The transport link between the CU and the DU in a disaggregated RAN (Correct answer)
The link between the RU and the DU

Correct answer: The transport link between the CU and the DU in a disaggregated RAN

Midhaul refers to the transport segment connecting the gNB-CU (often centralized) to the gNB-DU, as distinct from fronthaul (DU to RU) and backhaul (CU to core).

Question 52: What is the significance of Ericsson's Microwave Capacity Connect feature for operators?

It enables on-demand capacity upgrades via software licensing without requiring hardware replacement (Correct answer)
It physically swaps radio units during peak traffic hours
It monitors competitor spectrum usage for interference avoidance
It automatically connects microwave links to nearby optical fiber switches

Correct answer: It enables on-demand capacity upgrades via software licensing without requiring hardware replacement

Microwave Capacity Connect allows operators to activate higher capacity tiers on existing hardware through software licensing, reducing truck rolls and capital expenditure.

Question 53: In Ericsson's EPC, what does the SGW (Serving Gateway) do?

Manages inter-PLMN roaming policy
Acts as the mobility anchor for user plane data during intra-LTE handovers and idle-mode paging (Correct answer)
Authenticates subscribers using AKA procedures
Provides IP address allocation to UEs

Correct answer: Acts as the mobility anchor for user plane data during intra-LTE handovers and idle-mode paging

The SGW anchors the user plane bearers during handovers between eNBs, buffers downlink data during UE paging, and routes packets between the eNB and PGW.

Question 54: In Ericsson's Segment Routing (SR) deployment, what replaces traditional RSVP-TE signaling?

OSPF extensions only
Static MPLS labels
Source-based path encoding using segments (Correct answer)
LDP

Correct answer: Source-based path encoding using segments

Segment Routing encodes the forwarding path directly in the packet header using ordered segments, eliminating the need for per-flow RSVP-TE state in the network.

Question 55: Which Ericsson product family is the primary platform for microwave backhaul?

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

Correct answer: MINI-LINK

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

Question 56: What does Radio Link Aggregation (RLA) enable in Ericsson MINI-LINK microwave backhaul?

Enabling massive MIMO on microwave frequencies
Routing IP packets over satellite fallback links
Bonding multiple radio links to increase total throughput beyond a single link's capacity (Correct answer)
Reducing the frequency coordination workload

Correct answer: Bonding multiple radio links to increase total throughput beyond a single link's capacity

RLA bonds two or more microwave radio channels so traffic is load-balanced across them, effectively multiplying the available backhaul capacity.

Question 57: What is the purpose of Ethernet OAM (802.3ah/802.1ag) in Ericsson Carrier Ethernet deployments?

To increase Ethernet frame throughput
To encrypt Ethernet frames end-to-end
To assign IP addresses to Ethernet devices
To detect and locate faults in Ethernet links and services (Correct answer)

Correct answer: To detect and locate faults in Ethernet links and services

Ethernet OAM protocols (802.3ah for link-level and 802.1ag for end-to-end service) enable fault detection, path discovery, and performance monitoring.

Question 58: 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 59: In Ericsson's OSS, what does a 'Software Upgrade Package (SWP)' contain?

A network topology export
A billing configuration update
The software load and metadata needed to upgrade a network element to a new release (Correct answer)
Customer SLA policy templates

Correct answer: The software load and metadata needed to upgrade a network element to a new release

A Software Upgrade Package contains the new software images, compatibility matrices, and upgrade procedures required to move a NE to a new software version.

Question 60: What does the term 'Fast Reroute (FRR)' mean in Ericsson MPLS transport?

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

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.

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.

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