CTA Broadband & Access Network Technologies 2

Question 1

Which passive optical network (PON) standard is most widely deployed for fiber-to-the-home (FTTH) services?

Accepted Answer

GPON (Gigabit PON)

Answer

APON (ATM PON)

Answer

BPON (Broadband PON)

Answer

EPON (Ethernet PON)

Question 2

What wavelength is used for downstream transmission in a standard GPON deployment?

Accepted Answer

1490 nm

Answer

1310 nm

Answer

1550 nm

Answer

1625 nm

Question 3

What is the maximum downstream data rate defined in the GPON standard (ITU-T G.984)?

Accepted Answer

2.5 Gbps

Answer

622 Mbps

Answer

1.25 Gbps

Answer

10 Gbps

Question 4

In an FTTx deployment where fiber runs to a street cabinet and existing copper carries the signal to individual homes, which architecture is this?

Accepted Answer

FTTC (Fiber to the Cabinet/Curb)

Answer

FTTH (Fiber to the Home)

Answer

FTTB (Fiber to the Building)

Answer

FTTP (Fiber to the Premises)

Question 5

What is XG-PON (10G-PON), standardized as ITU-T G.987?

Accepted Answer

A passive optical network standard providing 10 Gbps downstream and 2.5 Gbps upstream

Answer

An experimental wireless broadband protocol for rural areas

Answer

A cable TV standard for 10 GHz millimeter-wave operation

Answer

A DSL bonding standard targeting 10 Gbps aggregate bandwidth

Question 6

Which access network technology uses a hybrid combination of fiber for the backbone and coaxial cable for the final distribution to subscribers?

Accepted Answer

HFC (Hybrid Fiber-Coaxial)

Answer

FTTH (Fiber to the Home)

Answer

VDSL2 (Very High Speed DSL 2)

Answer

ADSL2+ (Asymmetric DSL 2+)

Question 7

In a GPON network, what is the maximum logical split ratio supported by the standard?

Accepted Answer

1:128

Answer

1:16

Answer

1:32

Answer

1:64