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NEW QUESTION # 12
Regarding EPON, which of the following descriptions is incorrect?
- A. In the upstream direction from the ONU to the OLT, each ONU uses the broadcast mode to share the upstream bandwidth.
- B. The EPON standard is one of many TDM-PON standards and has the basic characteristics of a TDM-PON network: a tree topology network is composed of OLT, ONU and ODN (Optical Distribution Network).
- C. In the logical topology, the EPON protocol establishes a logical link for the OLT to each ONU, and the leading byte of the Ethernet data frame carries the logical link identity, that is, LLID (Logical Link Identity).
- D. The downstream data stream from the OLT to the ONU is encapsulated as an Ethernet message, and the corresponding LLID is attached and sent in the tree PON network. The optical splitter in the ODN broadcasts the data stream to each branch, and all ONUs can receive the downlink Ethernet data frame, and selectively receive their own data according to the LLID.
Answer: A
NEW QUESTION # 13
The customer needs to access the following information points: AP, PC, POTS, and CATV. Which of the following statements about data transmission of these information points by ONUs is correct?
- A. POTS voice services are TDM services and directly encapsulated in GEM frames.
- B. All types of data are encapsulated into Ethernet frames before PON-related encapsulation and transmission over one fiber.
- C. When an OLT is connected downstream to an ONU, one fiber and two wavelengths are used to carry CATV and other services respectively. All services except CATV are encapsulated into Ethernet frames before PON encapsulation.
- D. When an OLT is connected downstream to an ONU, one fiber and two wavelengths are used to carry CATV and other services respectively. For all services except CATV, if POTS is a TDM service, it is transparently transmitted.
Answer: C
Explanation:
* Service Types and Transmission :
* AP/PC (Data Services) : These services are typically Ethernet-based and encapsulated into Ethernet frames before being transmitted over the PON network.
* POTS (Voice Services) : Voice services can be either TDM-based or packetized. In modern GPON/XGS-PON systems, POTS is often packetized into Ethernet frames.
* CATV (Video Services) : CATV uses a separate wavelength (1550 nm) for analog or digital video transmission.
* Wavelength Division Multiplexing (WDM) :
* GPON/XGS-PON systems use WDM to transmit multiple services over a single fiber:
* One wavelength (1490 nm or 1577 nm) is used for data services (Ethernet).
* Another wavelength (1550 nm) is used for CATV.
* Analysis of Options :
* Option A : Incorrect because CATV is not encapsulated into Ethernet frames; it uses a separate wavelength.
* Option B : Correct because CATV uses a separate wavelength, and other services are encapsulated into Ethernet frames before PON transmission.
* Option C : Incorrect because POTS services are typically packetized into Ethernet frames in modern systems, not directly encapsulated in GEM frames.
* Option D : Incorrect because POTS is not transparently transmitted in modern GPON/XGS-PON systems.
Thus, the correct answer is B .
References:
* HCIA Huawei ACCESS Official Documentation , Chapter: GPON Service Encapsulation.
* ITU-T G.984.x Standards for GPON .
NEW QUESTION # 14
Is the following description correct? In PON networks, multimode optical fibers are often used.
- A. True
- B. False
Answer: B
NEW QUESTION # 15
In the GPON network, which of the following reasons may cause the ONT to fail to be automatically discovered?
- A. The optical power received by the ONT is less than the sensitivity value
- B. The optical power received by the ONT is greater than the overload optical power.
- C. OLT upstream port is down
- D. The ONT automatic discovery function of the GPON port is not enabled.
Answer: A,B,D
NEW QUESTION # 16
A school uses the POL networking and has only one campus. During VLAN design, VLANs are divided by service type and services are identified by a single VLAN tag. In this case, which VLAN attribute should be used?
- A. QinQ
- B. Common
- C. Stacking
- D. Sub
Answer: B
Explanation:
* VLAN Attributes :
* Common VLAN : Used for standard VLAN tagging, where a single VLAN tag identifies the VLAN.
* QinQ VLAN : Adds an additional VLAN tag for double-tagging, typically used in carrier networks.
* Sub VLAN : Part of a Super VLAN configuration, used for IP address conservation.
* Stacking VLAN : Similar to QinQ, used for double-tagging.
* Scenario Analysis :
* The school uses a single VLAN tag to identify services by type (e.g., student, faculty, administration).
* Since only one VLAN tag is used, the appropriate VLAN attribute is Common .
* Why A?
* Common VLAN is the simplest and most suitable choice for scenarios requiring single-tag VLAN identification.
Thus, the correct answer is A .
References:
* HCIA Huawei ACCESS Official Documentation , Chapter: VLAN Design.
* IEEE 802.1Q VLAN Tagging Standards .
NEW QUESTION # 17
In the EPON network, what is the upstream and downstream bandwidth of the PON port?
- A. 1.25Gpbs/1.25Gpbs
- B. 1.25bps/2.5Gbps
- C. 1Gbps/2Gbps
- D. 1Gbps/1Gbps
Answer: A
NEW QUESTION # 18
Which interfaces in the UA5000 IPMD single board are used to communicate with PVMD and implement VOIP services?
- A. 0 and 1;
- B. 0 and 2;
- C. 6 and 7
- D. 2 and 3;
Answer: C
NEW QUESTION # 19
Is the following description correct? The alarm levels of the MA5600T can be divided into five levels: critical, major, minor, warning, and cleared.
- A. False
- B. True
Answer: B
NEW QUESTION # 20
Is the following description correct? The MA5600T event level can be divided into four levels: critical, major, minor, and warning.
- A. False
- B. True
Answer: B
NEW QUESTION # 21
Is the following description correct? MxU automatic upgrade strategy, that is, when the device is powered on, the current version of the device is automatically compared with the target version of the strategy. If it is inconsistent, the device software version is automatically upgraded to the target version.
- A. False
- B. True
Answer: B
NEW QUESTION # 22
Which of the following optical modules has the most sufficient optical loss budget?
- A. CLASS B+
- B. CLASS C+
- C. CLASS B
- D. CLASS C++
Answer: D
Explanation:
* Optical Module Classes :
* Optical modules are classified based on their optical loss budget, which determines the maximum distance they can support over fiber-optic cables.
* Class Comparison :
* CLASS B : Supports shorter distances with lower optical loss budgets.
* CLASS B+ : Provides a higher optical loss budget than CLASS B, supporting longer distances.
* CLASS C+ : Offers an even higher optical loss budget, suitable for extended-reach deployments.
* CLASS C++ : Provides the highest optical loss budget, enabling the longest reach and greatest flexibility in network design.
* Why B?
* CLASS C++ has the most sufficient optical loss budget, making it the best choice for scenarios requiring maximum reach and reliability.
Thus, the correct answer is B .
References:
* HCIA Huawei ACCESS Official Documentation , Chapter: Optical Module Specifications.
* ITU-T G.984.x Standards for GPON .
NEW QUESTION # 23
In a GPON network, which of the following may cause the ONT to fail to be discovered? (Select All that Apply)
- A. The optical power received by the ONT is less than the sensitivity threshold.
- B. The ONT auto-find function of the GPON port is disabled.
- C. The optical power received by the ONT is greater than the overload optical power.
- D. The upstream port of the OLT is down.
Answer: A,B,C
Explanation:
* A: Weak optical power prevents ONT registration.
* B: Auto-find must be enabled for ONT discovery.
* D: Excessive optical power saturates the receiver.
NEW QUESTION # 24
What is the maximum transmission distance of SHDSL?
- A. 10KM
- B. 1.5KM
- C. 20KM
- D. 6KM
Answer: D
NEW QUESTION # 25
Which of the following methods can be used to implement communication between Ethernet switches across VLANs? (Select All that Apply)
- A. Smart Link can be deployed on switches to implement inter-VLAN communication.
- B. You can configure MSTP on a switch to implement inter-VLAN communication.
- C. When different VLANs are configured on different switches, you can configure hybrid or trunk interfaces to implement inter-VLAN communication.
- D. When different VLANs are on the same switch, you can set the IP address of the VLANIF interface to implement route forwarding.
Answer: C,D
Explanation:
Comprehensive and Detailed Step by Step Explanation:
* B (Correct): VLANIF interfaces enable Layer 3 routing between VLANs on the same switch.
* D (Correct): Hybrid/Trunk ports allow tagged traffic to pass between switches.
* A (Incorrect): Smart Link provides link redundancy, not inter-VLAN routing.
NEW QUESTION # 26
MA5600T supports multiple flow classification technologies. What flow classification technologies are currently supported?
- A. Based on VLAN + user-side service encapsulation type
- B. Based on the type of user-side service encapsulation
- C. Based on user-side VLAN
- D. Based on VLAN + user-side message priority
Answer: A,B,C,D
NEW QUESTION # 27
1518 byte Ethernet data message is converted into ATM cells for transmission through 1483 b format encapsulation, how many ATM cells will be converted into?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 28
When configuring a bridging ONU, how do you set the VLAN of the ETH1 port if the ETH1 port is used for a PC to access the Internet?
- A. Configure VLAN 1 on ETH1.
- B. Configure VLAN 4094 on ETH1.
- C. Configure a native VLAN.
- D. Use the default configuration of the ETH1 port.
Answer: C
Explanation:
* Bridging ONU Configuration :
* A bridging ONU acts as a transparent bridge between the PC and the OLT, forwarding traffic without modifying it.
* VLAN Configuration for ETH1 :
* VLAN 1 : The default VLAN, often reserved for management purposes. Using it for Internet access is not recommended.
* Default Configuration : Leaving the port unconfigured may result in improper VLAN tagging or untagged traffic, leading to connectivity issues.
* VLAN 4094 : Typically reserved for special purposes (e.g., QinQ termination) and is not suitable for general Internet access.
* Native VLAN : Configuring a native VLAN ensures that untagged traffic from the PC is associated with the correct VLAN for Internet access.
* Why D?
* Configuring a native VLAN is the correct approach to ensure proper VLAN tagging and seamless Internet access for the PC connected to ETH1.
Thus, the correct answer is D .
References:
* HCIA Huawei ACCESS Official Documentation , Chapter: VLAN Configuration.
* GPON Bridging ONU Configuration Guide by Huawei.
NEW QUESTION # 29
Configure ADSL profile parameters in UA5000, what measures can improve line stability?
- A. Turn on the grid delete coding switch
- B. Turn off the dynamic online adaptation function
- C. Improve noise tolerance
- D. The channel mode is selected as fast
Answer: A,C
NEW QUESTION # 30
The OLT supports the ( ) VLAN attributes. (Select All that Apply)
- A. Common
- B. MUX
- C. Stacking
- D. QinQ
Answer: A,C,D
NEW QUESTION # 31
When the MA5600 service box provides pure broadband service, how many slots can be inserted into the service board?
- A. 0
- B. 1
- C. 2
- D. 3
Answer: D
NEW QUESTION # 32
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