The total downstream bandwidth of the 10G EPON PONI port is the sum of the downstream bandwidth of EPON and the downstream bandwidth of 10GEPON.
- A . True
- B . False
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 . In voip mode, use the command ip address media 10.1.1.100 10.1.1.1 to configure the media IP
- B . Run the reset cold start command on the voice interface to make the interface attribute configuration take effect
- C . Use the if-h248 attributei command to configure interface attributes on the voice interface
- D . In voip mode, use the command ip address signaling 10.1.1.100 10.1.1.1 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 order of the server addresses recorded in the VIA field information in the message received by user B is?
- A . C->D->E
- B . E->C->D
- C . E->D->C
- D . C->E->D
The establishment, maintenance and dismantling of a session is completed through a series of message interactions between the SIP user and the server, so each information contained in the SIP text is unique, and no single information will appear A phenomenon in which a value occurs multiple times.
- A . True
- B . False
The Max-Forwards field can be used in the SIP message to solve the loop and avoid endless message forwarding.
- A . True
- 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 in the board logic and sent to the board CPU
- C . Configure general parameters of Layer 2 group pointer protocols (IGMP Proxy, GMP Snoop) globally based on the device. For all
- D . When igmp match mode disable, you need to configure the multicast program group
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 the OLT sends two join messages to the multicast router
- A . True
- B . False
Multicast technology effectively solves the problem of single-point transmission and multi-point reception, and realizes efficient data transmission from point to multipoint in the IP network
- A . True
- B . False
The class D multicast address range is from 224.0.0.0 to 238.255.255.255.
- A . True
- B . False
The IGMP version on the OLT is configured as V2. When the OLT receives the igmr v3 join message forwarded from the OnT, what will it do?
- A . Normal forwarding
- B . Send a specific group query message
- C . Send a general group query message
- D . Discard directly
Enable IGMP-snooping on the second layer. When the switch port receives the IGMP join message, it will listen to the message and add the corresponding port to the multicast group.
- A . True
- 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, disable the prejoin function
- B . Enable the quick leave function when adding a multicast user
- C . When adding a multicast user, enable the preview function
- D . Use a group address with a small value
A total of 100 multicast users on the OLT are watching 20 multicast programs. Assuming that each multicast program occupies a bandwidth of 2M, how much multicast traffic is currently available on the uplink port of the OLT?
- A . 200M
- B . 100M
- C . 40M
- D . 50M
When the main fiber is broken or the OLT cannot detect the expected optical signal (LOS) alarm, the possible reason is? (Multiple choice)
- A . There is a rogue ONU under the port
- B . Port trunk fiber failure
- C . All power failures or faults under the port
- D . Port laser is turned off
Use OTDR to locate the position of abnormal attenuation in the optical path. After the OTDR is connected to the detected line, which of the following parameters can be set? (Multiple choices)
- A . Setting the measurement range
- B . Set the wavelength
- C . Setup mode
- D . Set pulse width
In the FTTB/C scenario, the ONU is connected to the phone as an AG device, and there is no sound when the SIP protocol is off-hook. The possible reason is?
- A . There is packet loss in the upper layer network of the olt
- 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. It is necessary to remove the ONT service on the OLT first, then remove the ONT terminal, and finally register and configure the new ONT service
- A . True
- B . False
An IPTV user reported that the TV cannot be watched, and turned on the debugging switch on the OLT side. The debugging and printing information is as follows:
Huawei (config)
Which can be determined from the query results?
- A . The multicast bandwidth of the poN port is insufficient
- B . The user does not have the right to watch the program
- C . IGMP Sakamoto Mismatch
- D . User bandwidth verification failed
A power access service deploys GPON Type C dual-homing protection, and the state of the protection group and the uplink Ethernet port is determined on the OLT. When the state of the Ethernet port associated with the protection group on the OLT changes to down, which of the following descriptions is incorrect?
- A . The state of the work port on the ONU side changes to standby
- B . OLT communicates with ONU uplink status change
- C . After switching, the service on the ONU is sent to the OLT through the protect port, that is, the service message is transmitted on the protect port
- D . ONU detects link failure and triggers protection switching
When deploying GPON Type C single-homing protection, which of the following descriptions is correct?
- A . A branch fiber breaks, and the status of the OLT’s work port changes to standbyY
- B . The two ports protected by 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 exactly the same as the configuration before protection
The device will periodically send and receive LMCP messages to avoid information loss. If no messages are received within () LACP message interaction periods, the system will consider the port to be faulty.
- A . 3
- B . 5
- C . 4
- D . 2
The protection scope of GP ON Type B dual-homing protection includes? (Multiple choice)
- A . Active and Standby OLTs
- B . Main and backup main fiber
- C . The active and standby PON ports of the OLT
- D . Primary and backup branch fibers
When Type C dual-homing protection linkage uplink detection, if OLT or OLT uplink fails, Type C dual-homing protection can be switched to another OLT
- A . True
- B . False
Which of the following statements about defending against MAC Spoofing is incorrect?
- A . MAC Anti-MAC Spoofing’ feature and WMAC, SC, PPPOE SMAC features are mutually exclusive at VLA level
- B . After the anti-MAC Spoofing function is enabled, the system will automatically realize the dynamic binding of the AC address and the service flow
- C . After the Anti-MAC Spoofing function is enabled, for I PoE users using fixed IPs, users need to be configured statically
- D . Disable the Anti-MAC Spoofing function. The only action involved is to delete certain entries, which does not affect user service applications, but the service forwarding plane will be interrupted.
When it is detected that the CPU of the OLT main control board continues to rise, which are the possible reasons? (Multiple choices)
- A . Illegal user login
- B . Network Loops
- C . Cyber attacks
- D . Rogue ONU
In order to prevent network monitoring in the GPON system, the most commonly used method is?
- A . Information encryption
- B . Using physical transmission (not network)
- C . Wireless network transmission
- D . Use leased line transmission
When the PIT P switch is enabled globally or in the VLAN service template of the OLT, the service virtual port is allowed to carry upstream packets, the Vendor tag is switched, and the user upstream packets carry Vendor tarf information, which of the following about the OLT processing strategy of PITP message is correct?
- A . The OLT adds a local Vendor tap to the upstream PITP message
- B . The OLT directly forwards the user-side PITP message without any processing
- C . The OLT leaves the Vendor tag carried in the uplink PITP message, plus the local Vendor tag
- D . OLT discards uplink PITP packets
Which of the following statements about SSH connection is incorrect?
- A . SSH can be applied to remote encrypted connections and file transfer encryption
- B . The SSH protocol can encrypt all transmitted data, effectively preventing information leakage during remote management QUESTION NO :
- C . From the perspective of the client, SSH provides two levels of security verification
- D . The SSH protocol works at the network layer
Which of the following is not a QOS service model?
- A . Diffserv
- B . Intserv
- C . FIFO service
- D . Best Effort
When deploying home-customer services in the PON system, which of the following service configurations has the highest priority?
- A . VOIP
- B . GAME
- C . INTERNET
- D . IPTV
The OLT can directly copy the priority of the user message as the priority of forwarding the message upwards, and also supports direct local configuration
- A . True
- B . False
The OLT can perform traffic shaping through the service virtual port (service-port).
- A . True
- B . False
The DBA scheduling of the GP ON system is only for the upstream traffic, and cannot be scheduled for the downstream traffic.
- A . True
- B . False
The automatic discovery methods provided by sight include network segment method, ARP method and routing method. At the same time, it supports creating the network segment or IP address of the device that does not need to be connected as an exclusion list. During self-discovery of devices, the network segment or IP address configured in the exclusion list is automatically skipped.
- A . True
- B . False
In esight’s OnT zero-configuration deployment, when incrementally configuring an OLT, do not pre-configure the OLT.
- A . True
- B . False
esight is a network management software located in the enterprise network scenario, which can view the detailed information of the onu device, including which of the following information? (Multiple choice)
- A . UNT port information
- B . Speed
- C . Optical module temperature
- D . Transmit power of optical module
When configuring the IPTV service on the U2000, what templates are included in the IGMP template? (Multiple choice)
- A . Permission template
- B . Multicast user profile
- C . Program templates
- D . Preview parameter template
Which of the following templates needs to be configured when Huawei network management U2000 configures FTTH IPTV service access?
- A . SNMP template
- B . MGC template
- C . IGMP template
- D . Value-added service template
In the Huawei u2000 management system, when adding access network elements, you can only add them one by one.
- A . True
- B . False
The network management U2000 adds a line template to realize the mapping of user service flow to GEM PORT. The mapping mode includes? (Multiple choice)
- A . MAC
- B . PORT
- C . VLAN
- D . 802.IP
The effective downstream bandwidth of the GPON PON port is?
- A . 2G
- B . 1.25G
- C . 2.5G
- D . 2.2G
Which of the following measures can GPON adopt in terms of flow control? (Multiple choice)
- A . Gem-car
- B . gem mapping
- C . flow-car
- D . tcont-car
The number of users under the OLT can also determine whether the VLAN adopts single-layer or double-layer VLAN. When the number of users is small, a single-layer VLAN can be used. When the need to distinguish services and the number of users is less than (), a double-layer VLAN must be used.
- A . 2K
- B . 4K
- C . SK
- D . 1K
What is the uplink wavelength of 10G EPONE?
- A . 1577nm
- B . 1270m (symmetrical)
- C . 1310m (asymmetrical)
- D . 1490nm
In the 10GGPON system, XGEN frames are used to encapsulate data, and the PORT ID is defined as () bits in the XGEN header.
- A . 18
- B . 12
- C . 14
- D . 16
The maximum splitting ratio supported by 10GEPON is?
- A . 1:256 (Laboratory)
- B . 1:32
- C . 1:128
- D . 1:64
When using the SIP protocol, it is necessary to use the local digit map for matching. If the default matching mode is used to match the 7-digit number starting with 7727, then which options can be?
- A . Local-digit map add huawei normal 7727xxx/7726.
- B . Local-digit map add huawei normal 772./7727xxx
- C . Local-digit map add huawei normal 7727
- D . Local-digit map add huawei normal 7727xxx/7727
Among the following options, which description about the H.248 connection model is correct?
- A . The connection model cannot be modified during a user session
- B . When the session between two users ends, the corresponding association will be used
- C . A media gateway that only supports point-to-point connections can allow three or more endpoints to exist simultaneously in an association
- D . When the user calls successfully, the empty connection starts to be created
When using the H.248 protocol to deploy VoIP services, the registration information sent by the MG to the MGC contains the following information, indicating that each command sent this letter is
Services {Method=Restart
Reason=[901])
- A . ON Tre-register
- B . board restart
- C . reboot system
- D . reset cold start
User A and user B belong to different city servers, and both parties have only one landline at home that can be used for calls. If user A calls user B when user B calls out, the number of transactions included in the entire session is?
- A . 4
- B . 3
- C . 5
- D . 6
When a SIP user registers for the first time, the first message sent by the server is?
- A . 401 Unauthorized
- B . 486 Busy
- C . 100 Tring
- D . 200 0K
When configuring the multicast service, the VLAN carrying the group service must be consistent with the ID of the unicast VLAN
- A . True
- B . False
If the multicast service is only deployed in private networks. Which multicast address segment should be preferred for planning?
- A . 232.0.0.0/8
- B . 224.0.0.0/8
- C . 239.0.0.0/8
- D . 225.0.0.0/8
The traffic-suppress function of MA5680T uplink port suppresses multicast only for unknown multicast
- A . True
- B . False
The OLT device supports the use of authority templates to control the programs that group insertion users can watch
- A . True
- B . False
Set the ICON T type bound to the IPTV service of an ONT to Type 2, 20M bandwidth, then the maximum IPTV service cannot exceed 20M
- A . True
- B . False
If there are multiple set-top boxes under one ONT watching a multicast program at the same time, which of the following functions can be enabled on the OLT for the ONT multicast user to ensure that when one set-top box switches channels, the programs watched by other set-top boxes will not Affected
- A . MAC-based quick leave
- B . immediate departure
- C . preview
- D . prejoin
After the DHCP simulation is started, it will automatically stop when the system default timeout time is reached, and the simulation results will be deleted at the same time
- A . True
- B . False
The user accesses the network through PPPOE dial-up, and the "error 678" dial-up failure error occurs when the number is dialed, and the IP address cannot be obtained. The possible reason is?
- A . BRAs have no user address pool configured
- B . LCP negotiation failure
- C . Incorrect username and password
- D . Too many OLT service port access users
One-way phenomenon occurs during voice call, the possible reason is? (Multiple choice)
problem of the router of the IP bearer network
B. The signaling does not reach the voice server
C. The ARP proxy has not been enabled on the OLT?
D. Phone failure
Users report that IPTV has a long delay in changing channels. In order to improve the channel switching experience of ordinary users, the program pre-join function can be configured. Which of the following configurations can realize program pre-join?
- A . huawei (config) mlti cast-vlan x
huawei (config-mlan x) igmp program static ip 224.x..x enable - B . huawei (config) #igmp program static ip 224.xxx enable
- C . huawei (config)#ml ticast-vlan x
huawei (config-mwlan x) #igmp program add ip 224.xxx prejoin enable - D . huawei (config) #igmp program add ip 224.xxx prejoin an able
Check the protection configuration in the OLT example as follows
huawei (config) = protect-group 0 protect-target gpon-uni-port work mode time delay
huawei （ protect-group-0 ） #protect-group member port 0/5/0role work
huawei （ protect-group-0 ） #protect-group member port 0/5/l role protect
huawei (protect-group-0) #protect-group enable
According to the information above, which of the following statement is correct? (Multiple choice)
- A . When port 0/5/0 fails, the system can automatically switch to port 0/5/1 to maintain access services
- B . After the protection group is created, the default state of the protection group is disabled, and it is necessary to force the protection-group enable to enable the protection group
- C . The member ports of this protection type must be ports on the same GP ON board
- D . The configuration is GP ON Type B single-homing protection
An enterprise private line access service deploys GPON Type B single-homing protection. Use the protect-group mobert command to add protection group members to the protection group. Which need to pay more attention? (Multiple choice)
- A . When adding protection group members, you need to add working members first, and then increase protection members
- B . After the protection group is created, the default state of the protection group is enabled
- C . Member ports can be ports on different GPON boards, but must be of the same type of GPoN service board
- D . GPON ports do not support adding protection group members based on boards, only support adding protection group members based on ports
Which of the following conditions will trigger automatic protection switching for GPON Type B single-homing protection? (Multiple choice)
- A . Deterioration of backbone optical fiber line quality
- B . Branch fiber break
- C . Trunk fiber break
- D . The main POM port of the OLT is faulty
Generally speaking, the lower the suppression level of OLT broadcast messages, the more obvious the protection effect of the port/single board on the wide insertion traffic
- A . True
- B . False
If you want to cooperate with the upper layer authentication server for user authentication, you can add the source of user physical location information to the () field of the DHCP request message initiated by the user.
- A . Options 60
- B . Options 61
- C . Options 80
- D . Option 82
Which statement about the hooligan ON U is correct? (Multiple choice)
- A . The PoN system comes with a rogue detection function
- B . The rogue ONU is mainly divided into random light and long light onu
- C . A rogue ONU may cause the ONU to fail to register
- D . Rogue Onu does not affect user business, but only affects system management
When the OLT processes priority marks, which methods that can be adopted? (Multiple choice)
- A . From the outer layer Tag 802.ip priority of the ingress message to hold shell/map
- B . Copy the ToS value of the ingress packet
- C . From the inner layer Tag 802.ip priority support/mapping of the ingress message
- D . Directly specify the configuration
In the ACL, if the data packets need to be filtered according to the source IP address information, destination IP address information, port number and other information of the data packets, then the ACL number range to be created is?
- A . 3000-3999
- B . 2000-2999
- C . 5000-5999
- D . 4000-4999
Which of the following types of DBA bandwidth will reduce the upstream bandwidth of the PON port after the DBA horizontal board is configured and successfully used by the ONT? (Multiple choice)
- A . assure
- B . max
- C . best effort
- D . fixed
By default, what type of OLT queue scheduling mode is it?
- A . WRR
- B . WFQ
- C . CQ
- D . PQ
The prerequisites for eSight to automatically discover OLT and MXU devices through IP addresses, which do not include?
- A . esight and the device need to be on the same network segment, otherwise the device cannot be discovered using the ARP broadcast protocol
- B . esight and the device can communicate with each other through routing (Ping each other)
- C . Already have the operation authority of "resource access".
- D . The SNMP parameters in the eSight example have been configured and are consistent with the SNMP parameters on the device side
What is the port number used by the SNMP protocol between the OLT and the u2000 network management system? (Multiple choice)
- A . 23
- B . 80
- C . 161
- D . 162
Huawei network management U2000 realizes the configuration of voice services, and the voice configuration is delivered through ()
- A . Value-added service template
- B . SNMP template
- C . Business Templates
- D . Line template
When U2000 network management configures VoIP services, the configuration of voice-related parameters can be configured on the general board of ONT value-added services of U2000, but only the SIP protocol can be configured, and the configuration of the H248 protocol must be configured on the OMU.
- A . True
- B . False
On the U2000 network management, it is observed that the indicator light of the OLTP ON port is not green, indicating that the PON port is faulty.
- A . True
- B . False
In FTTX business networking and data planning, user security needs to be considered. Which of the following measures can prevent inter-user attacks?
- A . Defense against IP spoofing
- B . Use port physical information to identify users
- C . User Layer 2 Isolation and Controlled Mutual Access
- D . Use anti-mac to solve
The stages that general network design will go through and their sequence are?
- A . Information collection stage –> planning stage –> network outline design stage –> network detailed design stage –> network deployment design stage
- B . Planning stage –> network outline design stage –> information collection stage –> network detailed design stage –> network deployment design stage
- C . Planning stage –> information collection stage –> network outline design stage –> network detailed design stage –> network deployment design stage
- D . Information collection stage –> planning stage –> network deployment design stage –> network detailed design stage –> network outline design stage
OLT uplink can improve bandwidth and reliability through link aggregation. Which of the following modes is currently supported by OLT uplink aggregation? (Multiple choice)
- A . dynamic
- B . Manual
- C . static
- D . Automatically
Regarding the principle of terminal selection, which of the following statements is correct? (Multiple choice)
- A . Meeting special needs
- B . Need to consider cost
- C . No need to comply with project requirements
- D . Select the terminal type according to the network construction mode
The uplink wavelength in the 10G GPON system is?
- A . 1310nm
- B . 1490nm
- C . 1270mm _
- D . 1577nm
Rules can be formulated based on link layer information such as source MAC address, VLAN ID, layer 2 protocol type, and destination MAC address, and the ACL for corresponding data processing is?
- A . Basic ACLs
- B . Advanced ACLs
- C . Link layer ACL
- D . User-defined ACL
The main solution to MAC address spoofing does not include? (Multiple choice)
- A . Limit the number of MAC addresses learned by users
- B . Manually configure a static MAC address
- C . Automatically perform MAC address binding
- D . Replace user terminal
Compared with Type C dual-homing protection, which of the following description of Type C single-homing protection is wrong?
- A . Simple networking and easy OLT/ONU management.
- B . When the OLT or the OLT uplink fails, it can be switched to another OLT.
- C . OLT failure will cause service interruption.
- D . To protect the important business of users, which is used for the protection of enterprise private line access business and base station private line access business.
When OLT traffic scheduling, which of the following traffic will be marked in green?
- A . Traffic below CIR
- B . Traffic above CIR but below PIR
- C . Flow above PIR
- D . Higher traffic than CBS
Regarding the Gem port design principles, which of the following statements is incorrect?
- A . Gem ports need to be planned under the same PON port, and Gem port IDs between PON ports can be repeated.
- B . In FTTH mode, each user (ONU) is allocated a Gem port for each service flow.
- C . In FTTB mode, for ordinary users, it is recommended to allocate Gem ports on each ONU according to the outer VLAN of the service flow, and each Gem port corresponds to a maximum of 1024 VLANs.
- D . In FT TB mode, for important broadband leased line users, it is recommended that each broadband leased line user corresponds to a Gem port.
The system of IEEE 802.1X protocol includes: (Multiple choice)
- A . Supplicant System (client)
- B . Authenticator System (authentication system)
- C . Account system (billing system)
- D . authentication server system (authentication server)
In the GPON system, Huawei recommends not to use level-2 or higher splitting. Which of the following networking are wrong? (Multiple choice)
- A . The first-level spectroscopic 1:32, the second-level spectroscopic 1:16
- B . Primary splitting 1:2, secondary splitting 1:8
- C . First-level splitting 1:8, second-level splitting 1:64
- D . First-level splitting 1:2, second-level splitting 1:16
With the development of business, the demand for bandwidth is getting higher and higher, and 10G PON technology can better adapt to the needs of the network. Which of the following description of 10G PON is correct? (Multiple choice)
- A . The frame structure of 10G GPON still uses GEM frames in order to be compatible with GPON.
- B . Although the upstream wavelength range of 10G GPON coincides with GPON, it does not affect the coexistence of the two.
- C . Compared with GPON, 10G GPON has a larger splitting ratio, which can better save ODN investment.
- D . 10G GPON provides larger bandwidth and more sufficient optical power budget.
The uplink rates of 10G EPON are? (Multiple choice)
- A . 1.25Gbps
- B . 2.5Gbps
- C . 5Gbps
- D . 10Gbps
If the ONU cannot be found automatically, the possible cause of the failure is? (Multiple choice)
- A . The actual distance from the ONU to the OLT is outside the ranging compensation distance configured by the OLT.
- B . The PON port is faulty.
- C . The ONU is not powered on.
- D . There are rogue ONUs that interfere with other ONU and cannot work normally.
When the FTTH user has the fault phenomenon of "off-hook and no power", the possible reasons are? (Multiple choice)
- A . Phone failure
- B . POTS port failure
- C . OLT failure
- D . The line between the ONU and the phone is faulty
The OLT has a powerful rogue ONU control function, and can detect and isolate rogue ONUs in any scenario.
- A . True
- B . False
1000 broadband users need to occupy a bandwidth of 100M when the concurrent rate is 30%, the penetration rate is 50%, the online bandwidth is 10M, the duty cycle is 15%, the number of channels is 1, and the coverage rate is 70%.
- A . True
- B . False
The data multiplexing method of 10G GPON is similar to that of GPON, and the uplink still adopts TDMA technology.
- A . True
- B . False
Link aggregation LACP only supports the aggregation mode of load sharing.
- A . True
- B . False
According to the status of the tokens in the token bucket, the device marks the packets with colors (green, yellow, red). The colors of the marks are mainly to provide the basis for packet processing for subsequent congestion control.
- A . True
- B . False
The traffic suppression function can work on unicast packets and multicast packets, but since broadcast packets are generally sent by equipment at the initial stage of communication, in order not to affect specific communication services, access network equipment does not provide support for broadcast Traffic suppression.
- A . True
- B . False
The downlink wavelength in the 10G GPON system is?
- A . 1310nm
- B . 1490nm
- C . 1270nm
- D . 1577nm