The total downlink bandwidth of the 10G EPON PONI port is the sum of the EPON downlink bandwidth and the 10GEPON downlink bandwidth.
- A . Ture
- B . False
What is the downlink wavelength in the 10GGPON system?
- A . 1310nm
- B . 1577nm
- C . 1270mm
- D . 1490nm
The maximum splitting ratio supported by 10GGPON is:
- A . 1:64
- B . 1:256
- C . 1:128
- D . 1:32
During the evolution of EPON to 10G EPON, WDM wavelength division modules are added at the central office to achieve a smooth transition, and ODN coexists.
- A . Ture
- B . False
The complete SIP message interaction process will include multiple request and response messages. A field can be used in the header field of the SIP message to describe the specific request corresponding to the current response message. This field is:
- A . Csea
- B . CaLL-ID
- C . First line
- D . Message body
Under the H.248 protocol, if the signaling IP and media IP are both 10.1.1.100/8, and the voice gateway is 10.1.1.1, when configuring the voIP service, which of the following command is wrong?
- A . Use the command ip address media 10.1.1.100 10.1.1.1 to configure the media IP in voip mode
- B . Use the reset cold start command under the voice interface to make the interface attribute configuration effective
- C . Use the if-h248 attributei command to configure interface attributes under the voice interface
- D . Use the command ip address signaling 10.1.1.100 10.1.1.1 in voip mode to configure the signaling IP
When the invitation message sent by user A reaches user B after passing through servers C, D, and E, the server address recorded in the VIA field in the message received by user B from top to bottom is:
- A . C->D->E
- B . E->C->D
- C . E->D->C
- D . C->E->D
The SIP user and the server are completed the establishment, maintenance, and removal of a voice path through a series of message interactions. Therefore, each information contained in the SIP text is one-to-one, and there will be no single information values appears multiple times.
- A . Ture
- B . False
The Max-Forwards field can be used in the S1P message to solve the loop QUESTION NO: to avoid endless message forwarding.
- A . Ture
- B . False
Regarding multicast, which of the following descriptions is incorrect?
- A . Add Lgmp user under BTV. By default, a multicast user can watch 8 programs.
- B . The report sent by the user is captured on the board logic and sent to the board CPU
CC. Based on the device’s global configuration of the common parameters of the Layer 2 blocking protocol (IGMP Proxy, GMP Snoop), valid for all multicast VLAN - C . When igmp match mode disable, the multicast program group needs to be configured
The correct multicast MAC address corresponding to the multicast IP address 227.120.1.32 is:
- A . 01-00-5e-78-01-32
- B . 01-00-5e-14-01-20
- C . 01-00-5e-78-01-20
- D . 01-00-5e-14-01-32
Under IGMP snooping, two users under the OLT order the same program, and olt sends two join messages to the multicast router.
- A . Ture
- B . False
Multicast technology effectively solves the problem of single-point sending and multi-point receiving, and realizes efficient point-to-multipoint data transmission in the IP network.
- A . Ture
- B . False
When configuring the multicast service on the MA5600T/MA5680T, the multicast vlan program adopts the static configuration method. Which of the following options must be configured, otherwise the multicast program may not be watched?
- A . igmp profile
- B . igmp program
- C . igmp priority
- D . igmp preview
The range of class D multicast addresses is from 224.0.0.0 to 238.255.255.255.
- A . Ture
- B . False
The IGMP version on the OLT is configured as V2. What kind of processing will the OLT do after receiving the igmr v3 join message forwarded from OnT?
- A . Normal forwarding
- B . Send specific group query message
- C . Send general group query message
- D . Discard directly
Enable IGMP-snooping on the layer 2. When the switch port receives an IGMP join message, it monitors the message and adds the corresponding port to the multicast group.
- A . Ture
- B . False
Which of the following options can improve the service experience of multicast users when switching channels (shorter switching time)?
- A . When adding a multicast program, prohibit the prejoin function
- B . Enable fast leave function when adding multicast users
- C . When adding a multicast user, enable the preview function
- D . Use a low-value multicast address
A total of 100 multicast users on the OLT are watching 20 multicast programs. If each multicast program occupies a bandwidth of 2M, how much multicast traffic does the OLT uplink port currently have?
- A . 200M
- B . 100M
- C . 40M
- D . 50M
When the backbone fiber is broken or the OLT cannot detect the expected optical signal (LOS) alarm, the possible cause is: (Multiple Choice)
- A . There is a rogue ON U under the port
- B . Port backbone fiber failure
- C . All power off or failures under the port
- D . The port laser is turned off
Use OTDR to locate the position of abnormal attenuation in the optical path. After the OTDR connection is to be detected the line, which of the following parameters can be set? (Multiple Choice)
- A . Set the measurement range
- B . Set the wavelength
- C . Set the mode
- D . Set the pulse width
It can be judged by the query results that (). (Multiple Choice)
- A . The service configuration of PPPoE users is normal
- B . The PPPoE user account and authentication method are correct
- C . The link between the MDU device and the BRAS is normal
- D . The MDU management IP is configured correctly
In the FTTB/C scenario, the ONU is connected to the phone as an AG device, and no sound failure when the SIP protocol is picked up. The possible cause is:
- A . olt upper network has packet loss
- B . The status of the MG interface on the ONU side is abnormal
- C . Voice server failure
- D . The route between ONU and IMS is unreachable
When the ONT fails or the hardware is upgraded, the ONT needs to be replaced, and the ONT service needs to be removed on the OLT, and then the ONT terminal is removed, and the new ONT service is registered and configured.
- A . Ture
- B . False
An IPTV user reports that the TV cannot be watched. Turn on the debugging switch on the OLT side, and the debugging print information is as follows:
Huawei(config) 
Can be judged by the query results:
- A . poN port multicast bandwidth is insufficient
- B . The user does not have rights to view program
- C . IGMP version does not match
- D . User bandwidth verification failed
A GPON Type C dual-homing protection is deployed for a power access service, and the status of the protection group and the uplink Ethernet port is set on the OLT. When the status of the Ethernet port associated with the protection group on the OLT becomes down, which of the following description is incorrect?
- A . The status of the work port on the ONU side becomes standby
- B . OLT general ONU uplink status changes
- C . After the switch, the service on the ONU is sent to the OLT through the protect port, that is, the service message is transmitted on the protect link.
- D . ONU detects link failure and triggers protection switching
TypeB protection provides redundant protection for both the OLT PON port and the backbone fiber. When the OLT or OLT PON port or the backbone fiber fails, manually switch to the other optical fiber.
- A . Ture
- B . False
In order to improve link reliability, the LT device configures the Time delay protection group through two uplink ports 0/19/0 and 0/20/0. Which of the following commands is optional?
- A . huawei （ config ） #interface giu 0/ 19
huawei （ config-if-giu-0/19 ） h offline-tx-off-time0500 - B . huawei （ protect-group-0 ） h protect-group member port 0/19/0role work
- C . huawei （ protect-group-0 ） a protect-group enable
- D . huawei （ config ） =protect-group 0 protect-target sth-nni port work mode time delay
When deploying GP ON Type C single-homing protection, which of the following description is correct?
- A . A branch fiber break occurs, and the status of the work port of the OLT becomes standby
- B . The two ports protected on the OLT side cannot send and receive data at the same time
- C . When the olt uplink fails, protection switching can be triggered
- D . The service configuration of ONU access is the same as the configuration before protection
The device will periodically send and receive LMCP packets to avoid information loss. If no packets are received within () LACP packet interaction cycles, the system considers the port to be faulty.
- A . 3
- B . 5
- C . 4
- D . 2