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| Section | Objectives |
|---|---|
| Introduction to Fixed Networks | - FTTx concepts and solutions - Fixed Wireless Access (FWA) - FTTH concepts and solutions - Broadband network fundamentals - Broadband access services |
| Access Network | - Quality of Service (QoS) fundamentals - Access network architecture - Optical Line Terminal (OLT) functionality - Multicast protocols for video distribution |
| Home Network | - Home network devices - Wi-Fi fundamentals - Home network connectivity - Home network device management |
| Fixed Networks Management | - NETCONF and YANG - NFV and SDN fundamentals - Nokia SDAN solution - Corteca home device controller - Altiplano SDAN Controller - IPFIX telemetry collection |
| Broadband Services | - Intent mapping to network layers - IPTV services - Lightspan service components - High-speed Internet services - Intent-Based Networking (IBN) - Value-added and triple-play services - Voice services |
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28. Frage
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?
Antwort: A
29. Frage
A network controller must modify configuration data stored on a NETCONF-capable access device. Which NETCONF operation is designed for this purpose?
Antwort: D
Begründung:
The NETCONF <edit-config> operation is used to create, change, merge, replace, or delete configuration data in a target configuration datastore. The target can be a datastore such as running or candidate, depending on the capabilities supported by the network device. By comparison, <get-config> retrieves configuration data and does not modify it. <close-session> requests an orderly termination of the current NETCONF session, while <kill-session> forces the termination of another session identified by its session ID. NETCONF operations are carried within RPC messages and commonly transported over a secure protocol such as SSH. YANG models define the structure, types, constraints, and relationships of the configuration and operational data manipulated through NETCONF.
30. Frage
Within the ETSI NFV management and orchestration architecture, which functional block manages virtualized compute, storage, and networking resources?
Antwort: B
Begründung:
The Virtualized Infrastructure Manager manages the compute, storage, and networking resources that form the NFV Infrastructure. Its responsibilities can include allocating resources to virtual workloads, tracking available capacity, and controlling the virtualized environment. The Virtual Network Functions Manager has a different role: it manages the lifecycle of VNF instances, including operations such as instantiation, scaling, updating, and termination. Higher-level NFV orchestration coordinates network services and resources across the NFV environment. A traditional Network Management System can perform fault, configuration, accounting, performance, and security management, but it is not the NFV functional block specifically defined to control virtual infrastructure resources. An ONT is subscriber-premises access equipment and is unrelated to NFV infrastructure resource management.
Batch 2: Questions 11-20
31. Frage
A YANG model specifies that a configuration leaf can contain an integer from 1 through 4094. What is the principal benefit of this restriction?
Antwort: B
Begründung:
YANG can define data types, ranges, patterns, mandatory nodes, default values, and relationships between configuration elements. A range restriction allows management software and network devices to verify that a submitted value falls within the permitted limits. For example, restricting a VLAN-related integer to an appropriate range prevents clearly invalid values from being accepted. This model-driven validation reduces configuration errors and makes automation more predictable. A passive optical splitter has no processing capability and cannot correct invalid configuration. The restriction also does not convert a value into an Ethernet frame or prevent NETCONF access. Instead, NETCONF can carry configuration data structured according to the YANG model, and the server can reject an <edit-config> request when the proposed data violates applicable schema constraints.
32. Frage
In an 802.1X-based subscriber authentication design, which role does the residential gateway normally perform?
Antwort: D
Begründung:
The residential gateway normally acts as the 802.1X supplicant. It supplies identity information and participates in the Extensible Authentication Protocol exchange required to obtain network access. The access device or OLT commonly performs the authenticator role, controlling the subscriber-facing port and relaying authentication information between the supplicant and the authentication server. The authentication server, frequently using RADIUS, validates the credentials and returns an authorization result or related policy attributes. The gateway is therefore not itself the RADIUS database or authentication server in this design. A multicast querier performs a separate function by sending IGMP queries to maintain multicast membership information. Before successful authentication, the authenticator generally restricts ordinary subscriber traffic while allowing the authentication exchange required to complete access control.
33. Frage
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