Lesson 6 Passive Optical Networks

The 10G-EPON access architecture supports two data rates in the upstream: what are they? 7.5 Gbps and 10 Gbps. 2.5 Gbps and 10 Gbps. 5 Gbps and 10 Gbps. 1 Gbps and 10 Gbps.

1 Gbps and 10 Gbps.

What is the maximum data rate the XG-PON1 (10G-PON) access architecture supports in the upstream? 2.5 Gbps. 10 Gbps. 7.5 Gbps. 5 Gbps.

2.5 Gbps

What is the wavelength allocation for video distribution (RF overlay) in broadband PON (BPON) access systems? Between 1,539 and 1,565 nm Between 1,480 and 1,500 nm Between 1,550 and 1,560 nm Between 1,260 nm and 1,360 nm

Between 1,550 and 1,560 nm

Which type of passive optical network (PON) architecture was formed to develop a cost-effective, high-bandwidth, easy-to-provision solution for connecting businesses, schools, libraries, and customer local area networks to the public Internet? Ethernet PON (EPON). Terabit-capable PON (TPON). Broadband PON (BPON). Gigabit-capable PON (GPON).

Ethernet PON (EPON)

What is one of the requirements that have been identified for next-generation access network architectures? Smaller split ratios. Shorter distances for transporting light waves. Expanded troubleshooting capability. Increased power consumption.

Expanded troubleshooting capability.

Which type of passive optical network (PON) access architecture replaced asynchronous PON (APON)? Broadband PON (BPON). Terabit-capable PON (TPON). Gigabit-capable PON (GPON). Ethernet PON (EPON).

Gigabit-capable PON (GPON)

Which element of a passive optical network (PON) consists of a downstream (forward path) optical transmitter, an upstream (return path) receiver, and a multiplexer/demultiplexer? Optical network unit (ONU). Optical network terminal (ONT) Optical line terminal (OLT). Optical distribution network (ODN)

Optical line terminal (OLT)

What is a benefit of using a point-to-point (P2P) topology instead of a point-to-multipoint (P2MP) topology? P2P topologies share data rates among customers. P2P topologies are most cost-effective to implement. P2P topologies are more stable than P2MP topologies. P2P topologies can operate over shorter distances.

P2P topologies are more stable than P2MP topologies.

What is it about radio frequency over glass (RFoG) that made broadband cable operators envision using it to make a seamless transition from the legacy hybrid fiber/coax (HFC) architecture over to a gigabit-capable passive optical network (GPON) or Ethernet passive optical network (EPON)? RFoG controls and communicates directly with the optical network unit (ONU), which eliminates the need for middleware. RFoG operates at the same downstream and upstream wavelengths as GPON and EPON communications. RFoG can operate in parallel with GPON and EPON, operating independent of the PON communications protocols and data rates. RFoG utilizes fiber-to-the-feeder topologies, which many new-built communities require.

RFoG can operate in parallel with GPON and EPON, operating independent of the PON communications protocols and data rates.

What is the core objective of the Data Over Cable Service Interface Specification (DOCSIS) Provisioning of Ethernet passive optical network (EPON), or DPoE, access architecture? To make the existing DOCSIS back-office provisioning operations and the existing EPON back-office provisioning operations compatible. To eliminate the need for the installation of middleware between the EPON optical line terminal (OLT) and the DOCSIS back-office equipment. To make the DOCSIS elements appear and operate as EPON elements to the existing EPON-based back office provisioning operations. To make the EPON elements appear and operate as DOCSIS elements to the existing DOCSIS-based back office provisioning operations.

To make the EPON elements appear and operate as DOCSIS elements to the existing DOCSIS-based back office provisioning operations.