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| Section | Objectives |
|---|---|
| Topic 1: Software Defined Access Network (SDAN) | - Corteca platform - Altiplano Access Controller - Subscriber and service management - Network topology and service health |
| Topic 2: Management interfaces and automation | - NETCONF - CLI fundamentals - Telemetry and automation concepts - YANG data models |
| Topic 3: Service delivery and operations | - Voice, Internet and IPTV services - High-Speed Internet (HSI) - Network monitoring and troubleshooting - Service provisioning |
| Topic 4: Fixed network architectures and broadband access | - Broadband network architecture - Fixed Wireless Access (FWA) - Optical Distribution Network (ODN) - FTTH and FTTx technologies - Passive Optical Networks (PON) |
| Topic 5: Nokia fixed access portfolio | - Home networking devices - Lightspan FX and MF Optical Line Terminals - Optical Network Terminals (ONTs) - FastMile FWA solutions |
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18. Frage
What does hardware abstraction provide in a disaggregated access network?
Antwort: A
Begründung:
Hardware abstraction separates higher-level control and management functions from many platform-specific implementation details. It can provide controllers and applications with consistent models or interfaces for operating different supported hardware platforms. This makes automation, service development, and multivendor management more practical because applications do not need to reproduce every low-level procedure for each device. Abstraction does not require all platforms to contain identical components, nor does it eliminate actual differences in capacity, features, or operational constraints. Those differences must still be represented where relevant. It also does not make active access equipment passive. In a disaggregated access architecture, software is divided into functional modules, and standardized or well-defined interfaces allow those modules to interact with abstracted device resources and with higher-level orchestration or assurance applications.
19. Frage
Which Wi-Fi 7 capability allows a compatible device to use more than one frequency-band link as part of the same connection?
Antwort: C
Begründung:
Multi-Link Operation is a major Wi-Fi 7 capability that enables compatible devices to establish and coordinate multiple radio links, potentially across frequency bands such as 5 GHz and 6 GHz. Depending on the implementation, traffic can be distributed across links to increase throughput or moved between links to reduce latency and avoid interference. Earlier Wi-Fi generations generally treated a client's band connection more independently. Dynamic Bandwidth Allocation schedules upstream PON capacity, DSL vectoring mitigates copper-pair crosstalk, and VLAN stacking carries multiple VLAN identifiers in Ethernet frames. Multi-Link Operation requires support from both the access point and client. Actual performance also depends on spectrum availability, channel conditions, device capabilities, regulatory constraints, and the capacity of the access point's wired or wireless backhaul.
20. Frage
Which transport protocol is commonly used to provide a secure connection for NETCONF sessions?
Antwort: B
Begründung:
NETCONF is commonly transported over Secure Shell, which provides encryption, integrity protection, and peer authentication for the management session. After establishing the secure transport connection, the client and server exchange NETCONF capabilities and use RPC messages to retrieve or modify device data. IGMP manages IPv4 multicast group membership and does not provide a secure management transport. ARP resolves IPv4 addresses to Layer 2 hardware addresses within a local network. SIP establishes and manages communication sessions such as voice calls. Although NETCONF can conceptually operate over supported secure transports, NETCONF over SSH is the widely recognized deployment model. Secure transport is particularly important because NETCONF can expose operational information and perform configuration changes that materially affect access-network devices and subscriber services.
21. Frage
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?
Antwort: B
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.
22. Frage
Where should multicast traffic ideally be replicated in a bandwidth-efficient access network?
Antwort: A
Begründung:
Multicast is bandwidth-efficient because one stream can be transported across shared network sections and replicated only where paths diverge toward interested receivers. Routers and multicast-aware switching functions use membership and forwarding information to determine which interfaces require a copy. This approach avoids sending a separate end-to-end unicast stream for every viewer and avoids flooding the content to subscribers who did not join the group. IGMP reports communicate receiver membership on IPv4 access networks, while IGMP snooping helps Layer 2 devices restrict forwarding to appropriate ports. Replicating content for every possible subscriber at the source would remove much of multicast's scaling advantage. Likewise, transmitting every stream on every access port would waste bandwidth and could expose receivers to large amounts of unwanted traffic.
23. Frage
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