[Apr 12, 2022] H31-311 Dumps Full Questions – Exam Study Guide [Q11-Q27]

NO.11 An arrayed waveguide grating (AWG) multiplexer/demultiplexer has the following advantages: short wavelength spacing, large number of channels, and flat passband. It suits DWDM systems with ultra-high speed and large capacity.

NO.12 The single-fiber bidirectional WDM system uses only one optical fiber to transmit optical signals in two directions at the same time. The optical signals in the two directions should be arranged at different wavelengths.

NO.13 The EPL service exclusively uses bandwidth on the line, which is highly secure. It is applicable to the private line application of VIP customers.

NO.14 Which of the following statements about overhead bytes is incorrect?

NO.15 Which of the following layers defines the protocols that control the network layer? The protocols of the layer work on logical links, that is end-to-end connections between two devices.

NO.16 When a bridge uses the IVL learning mode, the entry in the MAC address table is created according to the source MAC address and source port of the data frame. This entry is valid for all VLANs.

NO.17 Outband networking requires higher costs than inband networking, but provides more reliable management channels.

NO.18 If the overhead bytes pass through the backplane bus between two slots, the two slots are called paired slots. Paired slots implement automatic transparent transmission of overhead bytes, such as (),(), and (). This improves MSP switching performance and protects DCC communication with other NEs even if the SCC board on the local NE is offline. (Multiple Choice)

NO.19 The interval between two adjacent pointer justification events is at least ( ) frames.

NO.20 PDM uses the polarization beam splitter to divide the laser into two perpendicular directions: x and y.

NO.21 When LMSP is configured, there are two switching modes: single-ended switching and dual-ended switching. The protection protocol does not need to be enabled for single-ended switching.

NO.22 Which of the following is not an EVPLAN feature?

NO.23 In the frame structure of SDH signals, there are abundant overhead bytes used for operation, administration, and maintenance (OAM). The overhead bytes account for ( ) of all bits in the entire frame and greatly enhance the monitoring functions of the network.

NO.24 RSOH, MSOH, HPOH, and LPOH implement monitoring functions in the descending order of monitoring scope.

NO.25 Which of the following clock working modes support the ITU-T G.781 standard? (Multiple Choice)

NO.26 The coherent receiver technology uses the local oscillator laser that has the same frequency as received signals to perform coherent processing and recovers the ( ) information from the received signals. (Multiple Choice)

NO.27 Frame-Mapped GFP (GFP-F) is a processing mode oriented to data coding blocks (such as Fiber Channel and ESCON).