Huawei HCIA-Transmission (H31-311) Certification Sample Questions

01. How does the use of Reconfigurable Optical Add-Drop Multiplexer (ROADM) technology benefit NG WDM networks?
a) By limiting the network to predefined wavelengths
b) By allowing dynamic reconfiguration of wavelengths without interrupting the network
c) By reducing the overall bandwidth of the network
d) By exclusively managing electrical signal conversions

02. When evaluating transmission network boards, what factor is critical for compatibility?
a) Color and design of the board
b) The manufacturer of the adjacent equipment
c) The weight of the board
d) The type of connectors and supported protocols

03. In the context of transmission network products, what is the purpose of interface boards?
a) To serve as the primary power supply unit
b) To facilitate user access to the network
c) To connect the transmission equipment to network cables
d) To manage the cooling system within the equipment

04. The function of a Data Center in NG WDM networks is primarily to?
a) Host customer-specific equipment only
b) Act as a transit site for all passing signals
c) Function exclusively as an internet exchange point
d) Serve as a hub for data storage, processing, and distribution

05. What are the key layers in the NG WDM network architecture?
a) Physical, Data Link, and Network
b) Application, Presentation, and Session
c) Optical Transport Network (OTN), Multiprotocol Label Switching (MPLS), and Application
d) Physical, MPLS, and Application

06. Which are components of OTN overhead?
(Choose 2)
a) Forward error correction (FEC)
b) Payload type identifier
c) Wavelength identifier
d) Voltage level indicator

07. In WDM systems, what role do dispersion compensators play?
a) They convert electrical signals into optical signals.
b) They compensate for signal loss over long distances.
c) They correct for signal spreading caused by chromatic dispersion.
d) They split the optical signal into its component wavelengths.

08. Which are key features of OTN interface structures?
(Choose 2)
a) Support for a wide range of client signals
b) Use of electrical signals only
c) Dynamic bandwidth allocation
d) Standardized frame structures

09. What are the key features of Ethernet?
(Choose 3)
a) Collision detection
b) Packet switching
c) High data rates
d) Circuit switching

10. How does Forward Error Correction (FEC) benefit WDM optical networks?
a) By reducing the optical signal power
b) By enhancing signal-to-noise ratio (SNR)
c) By decreasing the network's operational costs
d) By improving the bit error rate (BER) performance