Free Nokia 4A0-F10 Exam Dumps Questions & Answers

In a Lightspan High-Speed Internet service architecture, what is the role of the HSI VPLS on the IHUB?

• A.It converts optical signals into analog telephone signals.
• B.It performs DSL crosstalk cancellation on copper pairs.
• C.It assigns Wi-Fi channels to residential gateways.
• D.It switches HSI traffic between service forwarders and network-facing interfaces.

Which of the following statements correctly distinguishes traffic shaping from traffic policing?

• A.Shaping selects multicast groups, while policing assigns subscriber VLANs.
• B.Shaping buffers excess traffic, while policing can drop or remark nonconforming traffic.
• C.Shaping always drops excess traffic immediately, while policing delays it in a queue.
• D.Shaping is applied only to optical signals, while policing is applied only to copper signals.

What is the primary function of the cladding in an optical fiber?

• A.To keep light confined within the fiber core
• B.To amplify optical signals over long distances
• C.To convert electrical signals into optical signals
• D.To divide one optical signal among multiple subscribers

Which characteristic distinguishes G.fast from traditional ADSL technologies?

• A.fast is designed to deliver high broadband rates over relatively short copper loops, frequently using existing building or drop wiring. It uses a much wider and higher-frequency spectrum than traditional ADSL and commonly employs Time Division Duplexing. With TDD, upstream and downstream transmission use the same frequency spectrum during different time intervals. The upstream-to-downstream capacity ratio can therefore be adjusted through the TDD configuration. Higher frequencies can support greater capacity but experience substantial attenuation over distance, which is why G.fast is best suited to short loops. It does not operate through passive optical splitters, although fiber may be deployed close to the subscriber before the final copper segment. G.fast also supports broadband services rather than voice-only delivery.
• B.G.fast requires a separate copper pair for upstream and downstream traffic.
• C.G.fast operates only over passive optical splitters.
• D.G.fast carries only voice services and does not support broadband data.
• E.G.fast commonly uses high frequencies and time-division duplexing over short copper loops.

Where should multicast traffic ideally be replicated in a bandwidth-efficient access network?

• A.On every access port regardless of multicast group membership
• B.At the source once for every possible subscriber, including nonmembers
• C.At every receiver before the multicast stream enters the network
• D.Only at points where the delivery path branches toward interested receivers