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| Section | Objectives |
|---|---|
| Introduction to Fixed Networks | - Broadband access fundamentals - FTTH, FTTx and FWA solutions |
| Home Network | - Home devices and connectivity - Wi-Fi fundamentals |
| Access Network | - Multicast and QoS principles - Access network architecture - OLT functions |
| Fixed Networks Management | - Netconf/YANG and telemetry - NFV and SDN concepts - Altiplano Software-Defined Access Network (SDAN) |
| Broadband Services | - Lightspan service components - Internet, IPTV and voice services |
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NEW QUESTION # 16
Which transport protocol is commonly used to provide a secure connection for NETCONF sessions?
Answer: C
Explanation:
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.
NEW QUESTION # 17
Which architectural principle is fundamental to Software-Defined Networking?
Answer: D
Explanation:
A central principle of Software-Defined Networking is the separation of control logic from packet-forwarding functions. The data plane remains responsible for forwarding traffic, while logically centralized control software determines policies and programs network behavior through defined interfaces. Logically centralized does not necessarily mean that all controller functions run on one physical server; they may be distributed for scalability and resilience while presenting a coordinated control view. SDN emphasizes programmability, automation, abstraction, and the use of APIs. It does not require every forwarding device to independently make all high-level policy decisions. It also avoids tightly coupling every function into one fixed proprietary system. In fixed-access networks, these concepts help operators automate service delivery and manage different access devices through common models and controller applications.
NEW QUESTION # 18
A YANG model specifies that a configuration leaf can contain an integer from 1 through 4094. What is the principal benefit of this restriction?
Answer: B
Explanation:
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.
NEW QUESTION # 19
Which Altiplano intent is used to define the uplink interfaces that connect an OLT toward the aggregation network?
Answer: C
Explanation:
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.
NEW QUESTION # 20
A network controller must modify configuration data stored on a NETCONF-capable access device. Which NETCONF operation is designed for this purpose?
Answer: A
Explanation:
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.
NEW QUESTION # 21
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