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| Section | Objectives |
|---|---|
| Service delivery and operations | - Service provisioning - Voice, Internet and IPTV services - High-Speed Internet (HSI) - Network monitoring and troubleshooting |
| Fixed network architectures and broadband access | - FTTH and FTTx technologies - Broadband network architecture - Fixed Wireless Access (FWA) - Passive Optical Networks (PON) - Optical Distribution Network (ODN) |
| Nokia fixed access portfolio | - Optical Network Terminals (ONTs) - Lightspan FX and MF Optical Line Terminals - FastMile FWA solutions - Home networking devices |
| Management interfaces and automation | - CLI fundamentals - YANG data models - Telemetry and automation concepts - NETCONF |
| Software Defined Access Network (SDAN) | - Subscriber and service management - Altiplano Access Controller - Corteca platform - Network topology and service health |
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NEW QUESTION # 37
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 # 38
A network controller must modify configuration data stored on a NETCONF-capable access device. Which NETCONF operation is designed for this purpose?
Answer: C
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 # 39
A service provider combines two copper pairs to increase the available DSL rate for one subscriber. Which technology is being used?
Answer: A
Explanation:
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.
NEW QUESTION # 40
In a voice service delivered through an ONT, which component commonly provides signaling toward the operator's SIP infrastructure?
Answer: A
Explanation:
A voice-capable ONT commonly contains a SIP agent that handles signaling toward the operator's SIP registrar and proxy infrastructure. An analog telephone can connect to a telephone interface on the ONT, which converts between the analog user interface and the packet-based voice service. Within the access node, voice traffic can be carried through a voice forwarder and an appropriate VPLS toward the aggregation network. A passive optical splitter merely divides optical power and cannot originate or terminate SIP signaling. A Wi-Fi mesh satellite extends wireless coverage, while IGMP snooping manages Layer 2 forwarding for multicast groups. SIP signaling establishes and manages communication sessions, whereas the actual media stream is commonly carried separately using a real-time transport protocol once the call has been established.
NEW QUESTION # 41
Which characteristic distinguishes G.fast from traditional ADSL technologies?
Answer: B
NEW QUESTION # 42
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