NEW QUESTION 227
The high-speed railway engineering disaster prevention and communication interface is the () interface.

NEW QUESTION 228
Which of the following local maintenance terminals can be used to manage MSTP equipment?

NEW QUESTION 229
A PAUSE frames use reserved multicast addresses and are not forwarded by bridges or switches. In this way, the PAUSE frame does not generate any additional information.

NEW QUESTION 230
Regarding the processing of data frames by the data board port, which of the following descriptions are correct? (Multiple choice)

NEW QUESTION 231
Which of the following methods are included in WDM networking and application? (Multiple choice)

NEW QUESTION 232
Which overhead below 112 is not ODUk overhead?

NEW QUESTION 233
Which of the following bytes can be used for wired phones between two REG devices?

NEW QUESTION 234
According to the formula “ODUk rate = 239/(239k) x STMN frame rate”, ODU4 The rate is equal to
239/235x STMN frame rate.

NEW QUESTION 235
For osn3500, which of the following boards provides centralized backup capability for the +3.3V power supply of each board in the sub-shelf?

NEW QUESTION 236
Which of the following options are the main characteristics of the transmission network? (Multiple choice)

NEW QUESTION 237
MPLS is a label forwarding technology. Which of the following was its original design purpose?

NEW QUESTION 238
When there is a Critical Error In Seconds (SES) in the PM portion of the ODUk layer, which of the following alarms is reported by NMS?

NEW QUESTION 239
Additional services cannot be configured on the protection channel of 1:1 linear multiplex section protection.

NEW QUESTION 240
OLT does not need to be configured with () module only when using external optical transmission equipment.

NEW QUESTION 241
Some SNCP protection inversion conditions are default, such as AU-AIS and TU-AIS. Other conditions are optional, such as HP-TIM and HP-SLM. Optional conditions can be flexibly set according to the level of the costume.

NEW QUESTION 242
Which of the following options is emitted from an ordinary light source, which has all possible vibration directions and is symmetrical to the direction of light propagation?

NEW QUESTION 243
In the electric power dispatching system, dispatching data is transmitted in the transmission network and data network in the form of Ethernet services.

NEW QUESTION 244
Which of the following wavelengths can be used as pump light sources? (Multiple choice)

NEW QUESTION 245
The basic actions for label forwarding in MPLS networks are PUSH, SWAP, and PHP.

NEW QUESTION 246
Which of the following options does the 802.1Q tag header contain? (Multiple choice)

NEW QUESTION 247
The most effective subnet mask in a point-to-point WAN link is 255.255.255.252.

NEW QUESTION 248
Among the following modulation technologies, which one performs best in terms of wavelength stability?

NEW QUESTION 249
The working mode of the port determines the flow control mode of the port.
When the operating mode is 100Mbit/s full duplex, one of the following flow control modes can be used

NEW QUESTION 250
Which of the following bytes can be used for ordenwire calls between two REG devices?

NEW QUESTION 251
OTM nr.m consists of a maximum of “n” optical multiplexed channels and does not support non- channel related overhead. The letter “r” indicates reduced functionality.