The base station is deployed, the Tunnel and PW tests are normal, and the base station management is normal, but the base station cannot access the core network normally. What is the reason for the impossibility?

The IP addresses of the PTN equipment interconnection interfaces are not in the same network segment

User packets carry VLAN, but the port attribute is Access

On the L2L3PTN node, the L3VE termination VLAN segment does not include the base station's VLAN segment

There is no route to the address managed by the SGW on L2L3

When the switch is working, the device forwards data according to the MAC address forwarding table. Which of the following statements is correct?

If the destination address of the message is a unicast MAC address, look up the MAC address table, and if found, forward the frame to the corresponding port (excluding the source port)

If the destination MAC address of the packet is the broadcast MAC address, it will be flooded to all ports including the source port.

If the destination address of the message is a unicast MAC address, look up the MAC address table, and if found, forward the frame to the corresponding port (excluding the source port)

If the destination address of the packet is a unicast MAC address, but there is no corresponding entry in the MAC address table, the packet is discarded

If the MAC address entry of the device reaches the upper specification limit of the device, the device cannot learn new MAC address entries, and the packet is discarded.

Which of the following conditions will cause multiple channels to report BEFFEC-EXC alarms at the same time?

Optical fiber failure of optical cable or multiplexer

The signal is lost too much in the transmission of line C

The input optical power of the OTU board is too high or too low

Optical fiber failure of optical cable or multiplexer

The signal is lost too much in the transmission of line C

What are the possible reasons for the unsuccessful OCH creation by the path method?

Source, sink but inconsistent half-wavelength configuration

The data on the device side and the remote side of the network are not synchronized

Source, sink but inconsistent half-wavelength configuration

The data on the device side and the remote side of the network are not synchronized

The time on the device side and the network element side is not synchronized

When the data link layer of a router (IP forwarding) receives a packet whose length is greater than the maximum MTU of the interface that the router will send out, which of the following strategies is adopted?

Make a request to the router to reduce its packet size

The router works on the third layer (network layer) of the TCP/IP protocol stack. Which of the following is the main job it completes?

Establish turbulent-to-turbulent connections

A certain wavelength division system is configured with the 1st to 20th waves, using the NS4 single board, and testing the M40 output port with a spectrum analyzer during commissioning. It is found that the optical power of the 20th wave is significantly lower than the other 19th waves. What is the possible reason? ?

The luminescence of the 20th wave on the LU WDM side is too small

20th wave LU center wavelength shift

The insertion loss of the 20th channel corresponding to M40 is too large

The luminescence of the 20th wave on the LU WDM side is too small

20th wave LU center wavelength shift

The insertion loss of the 20th channel corresponding to M40 is too large

The RX error of the 20th wave of NS4 added 5DB fixed light attenuation

When configuring the L3VPN service, which operation will cause the service configuration to fail?

The IP address configured before the Layer 3 port is added to the UNI of the L3VPN

Create the UNI port from the base station direction as a VLAN aggregation sub-interface

Enable ARP proxy on VLAN aggregation sub-interfaces

The IPs of the two service access ports in the direction of the base station are the same IP

When configuring electrical layer crossing, what are the rules for time slot configuration?

For the convenience of management and maintenance, it is recommended to set the time slot cutting mode to automatic mode

For each board, the same time slot in the same direction cannot be used by multiple services at the same time

For the same service, the time slots occupied by the receiving turbulence and the transmitting turbulence in one direction must be the same

For the convenience of management and maintenance, it is recommended to set the time slot cutting mode to automatic mode

For each board, the same time slot in the same direction cannot be used by multiple services at the same time

For the same service, the time slots occupied by the receiving turbulence and the transmitting turbulence in one direction must be the same

After changing the service type, there is no need to reset the service time slot

Which of the following descriptions is correct?

SAToP encapsulation type processes the CES service by encapsulating the 32 time slots in the E1 frame as a whole and then transparently transmitting it to the opposite end

SAToP supports time division suppression

OptiX PTN supports encapsulating E1 frames of different connections into one PW

One STM-1 channel contains 64 VC12 time slots

Which of the following descriptions are correct?

CD1 can access and process 2 channelized STM-1 services

L12 can provide 16 E1 interfaces

CD1 can access and process 2 channelized STM-1 services

L12 interface board can be installed in the slot of OpiX PTN 1900

EFG2 can provide 2 GE electrical ports

L12 can provide 16 E1 interfaces

During device initialization and commissioning, which of the following configuration descriptions is incorrect?

NE management can only use GE0/0/0 interface

The snmp parameter of the network element needs to be the same as the configuration of the network management

The DCN route of the NE needs to be associated with the VPN instance "_dcn_vpn-"

NE management can only use GE0/0/0 interface

The default network management 0SPF process number is 65534

Using Huawei PTN7900 to carry the L3VPN service, there is no need to plan VPN peers between the two devices

Active and standby L2/L3PTN equipment rooms

Between different L2/L3PTN and L3PTN sink node pairs

Between L2/L3PTN and L3PTN at the core layer

Active and standby L2/L3PTN equipment rooms

Between different L2/L3PTN and L3PTN sink node pairs

Between L3PTNs at the core layer

In order to support the self-opening of the base station, the DHCP Relay function is deployed in the PTN LTE bearer network. Which of the following descriptions is wrong?

The default relay hop count of DHCP Relay is 255

DHCP Relay is deployed on L2/L3 nodes

The default relay hop count of DHCP Relay is 255

DHCP server address can be configured with multiple

Configure routing on the PTN to the DHCP router

What is the main function of the physical layer?

Responsible for the physical and electrical interface between user equipment and network end equipment

Provide a reliable information transfer mechanism

A retransmission mechanism responsible for error detection and information

Responsible for the physical and electrical interface between user equipment and network end equipment

Establish and clear a network-wide connection between two transport protocol entities

Which of the following 7900 single-board software function descriptions are correct?

The performance and alarm module is mainly used to check the alarm and performance of the single board, and report it to the main control board

QoS, PwE3, L3VPN and other services are implemented by the service management module

The basic framework of the single board provides basic system support, including memory management, process/thread management

The software management module in the board is used to manage signaling protocols such as OSPF/1588V2

The performance and alarm module is mainly used to check the alarm and performance of the single board, and report it to the main control board

QoS, PwE3, L3VPN and other services are implemented by the service management module

The basic framework of the single board provides basic system support, including memory management, process/thread management

Which of the following statements about 100G coherent PDM-QPSK modulation is incorrect?

PDM polarization multiplexing technology is adopted, which has better nonlinear tolerance than 40GePDM-BPSK.

The essence of QPSK modulation is to reduce the baud rate of the optical signal by half without reducing the line rate by selecting 4 possible values in the phase of the optical field.

PDM-QPSK technology is the main modulation code technology for 100G transmission, which can reduce the line rate of 112Gb/s to the baud rate of 28Gbaud/s, greatly reducing the loan requirements for (optical) electrical devices.

PDM polarization multiplexing technology is adopted, which has better nonlinear tolerance than 40GePDM-BPSK.

PDC-QPSK supports DCMfree and DCM system applications, and supports smooth upgrade from existing 10G/40G network to 100G system.

Which of the following statements about 802.1Q is wrong?

There are only 4 VLAN priorities in the 802.1Q Ethernet frame structure

The TPID value in the 802.1Q Ethernet frame structure is 8100

In theory, the value range of VLAN ID is 0-4095

There are only 4 VLAN priorities in the 802.1Q Ethernet frame structure

802.1Q Ethernet frames are 4 bytes longer than normal Ethernet frames

Which of the following statements about the advantages of QinQ is correct?

Solve the problem of increasingly scarce public network VLAN ID resources

Users can plan their own private network VLAN ID

Make the user network more independent

Solve the problem of increasingly scarce public network VLAN ID resources

Users can plan their own private network VLAN ID

Provide a simpler L3VPN solution

Make the user network more independent

Which of the following statements about the slave subrack SCC function is correct?

Status management of boards from subracks

Protection switching protocol processing of this subrack

Which of the following statements about optical line protection OLP is wrong?

Single-ended switching optical line protection requires APS protocol

oLpz can only be fitted on the RU line side of each site

The OLP board is used to protect the powder fiber

Segmentation protects the combined optical signal, and separate routing is used between sites

Single-ended switching optical line protection requires APS protocol

oLpz can only be fitted on the RU line side of each site

Huawei H35-260 Practice Test 4 - Free Online Exam Questions 121-160

The international professional organization responsible for allocating P addresses has divided several network segments as private network segments, which can be freely allocated and used by people on the private network. What are the following network segments belonging to private addresses?

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Huawei H35-260 Practice Test 4

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