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| Section | Objectives |
|---|---|
| Topic 1: Fixed network architectures and broadband access | - Broadband network architecture - Optical Distribution Network (ODN) - Passive Optical Networks (PON) - FTTH and FTTx technologies - Fixed Wireless Access (FWA) |
| Topic 2: Software Defined Access Network (SDAN) | - Corteca platform - Altiplano Access Controller - Subscriber and service management - Network topology and service health |
| Topic 3: Service delivery and operations | - Network monitoring and troubleshooting - Voice, Internet and IPTV services - High-Speed Internet (HSI) - Service provisioning |
| Topic 4: Nokia fixed access portfolio | - Home networking devices - Optical Network Terminals (ONTs) - FastMile FWA solutions - Lightspan FX and MF Optical Line Terminals |
| Topic 5: Management interfaces and automation | - YANG data models - CLI fundamentals - Telemetry and automation concepts - NETCONF |
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33. Frage
Which connection is normally used by a Fixed Wireless Access indoor gateway to reach the service provider's access network?
Antwort: C
Begründung:
A Fixed Wireless Access indoor gateway normally uses a 4G or 5G radio connection to reach the service provider's mobile or fixed-wireless access network. Inside the home, the gateway can provide Ethernet and Wi-Fi connectivity to subscriber devices. This separates the wide-area access technology from the in-home distribution technology: cellular radio connects the premises to the operator, while Wi-Fi connects local user devices. A DSLAM is associated with copper-based DSL access, and a passive optical splitter belongs to a PON deployment. A subtending interface connects access nodes rather than a subscriber gateway to a radio network. Depending on the deployment, the FWA gateway may also be remotely provisioned and monitored using an external management platform and standardized CPE-management mechanisms.
34. Frage
A provider wants to separate every subscriber's traffic throughout the access network, even when subscribers use the same service. Which VLAN model best meets this requirement?
Antwort: D
Begründung:
A VLAN-per-subscriber model assigns a distinct VLAN context to each subscriber, providing clear Layer 2 separation between subscribers even when they consume the same service. This can simplify subscriber identification and support individual policy or forwarding treatment, but it requires the network to accommodate a larger number of VLANs. In a VLAN-per-service model, multiple subscribers using the same service can share a service VLAN toward the aggregation network. The access node must then preserve subscriber isolation through other forwarding controls and map traffic correctly between subscriber-facing and network-facing interfaces. Using one untagged VLAN for the entire access network provides insufficient segmentation. Assigning a VLAN to each multicast channel categorizes content rather than uniquely separating individual subscribers and therefore does not meet the stated requirement.
35. Frage
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?
Antwort: A
Begründung:
The uplink-connection intent defines how an OLT connects toward the aggregation or transport network. It is used to configure relevant uplink resources, which can include network-facing interfaces and associated parameters supported by the device and intent model. This intent is distinct from the broader device intent and device-configuration information used to identify and configure the particular access node and its assigned profiles. Subscriber authentication, Wi-Fi radio operation, and multicast membership reporting are separate functional areas and are not substitutes for the OLT uplink-connection intent. By representing uplink connectivity as an intent, Altiplano can translate the desired connection into lower-level device configuration and apply it consistently through model-driven management. The resulting configuration must still match the capabilities and physical resources available on the selected OLT.
36. Frage
What is the primary function of the cladding in an optical fiber?
Antwort: A
Begründung:
The cladding surrounds the optical fiber core and has a lower refractive index than the core. This difference causes light to remain confined within the core through total internal reflection, allowing the optical signal to travel along the fiber. The cladding does not generate or amplify light; transmitters and optical amplifiers perform those functions. It also does not divide an optical signal among subscribers, which is the role of a passive optical splitter in an Optical Distribution Network. Outside the cladding, protective coatings and buffers help protect the glass from moisture, bending, and mechanical damage. The core and cladding therefore perform essential optical functions, while the surrounding protective layers primarily provide physical protection.
37. Frage
A service provider combines two copper pairs to increase the available DSL rate for one subscriber. Which technology is being used?
Antwort: A
Begründung:
DSL bonding combines two or more physical copper pairs into a single logical subscriber connection. Traffic is distributed across the available pairs, allowing the aggregate bitrate to increase, provided the individual lines have suitable quality and compatible performance. Bonding can also provide operational benefits where one pair alone cannot deliver the required service rate. It is different from vectoring, which reduces crosstalk among coordinated copper lines by generating compensating signals. Optical splitting divides optical power in a PON and does not combine copper capacity. Multicast replication creates copies of multicast packets for different receiver paths and is unrelated to DSL transmission capacity. Both ends of a bonded DSL connection must support the applicable bonding method and coordinate traffic across the paired lines.
38. Frage
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