Huawei Certified ICT Professional - Access — Free Practice Questions
10 free sample questions from a bank of 65, with the correct answers and explanations. No signup required — start practising right now.
1(Multi-select) Use 0TDR to locate the abnormally attenuated location in the optical path, and after the OTDR is connected to the detected line, which of the following parameters can be set.
Sets the pulse width
Set the wavelength
Set the mode
Set the measurement range
Answer: A, B, C, D
The short version
A and B and C and D — OTDR setup covers pulse width, wavelength, mode, and range. All four condition the trace for locating abnormal attenuation.
Key concepts in this question
OTDR: reflectometer locating loss and reflection events by backscatter.
Pulse width / wavelength: trade resolution against reach and match the line wavelength.
Mode / range: acquisition mode and distance window for the fiber under test.
Why A and B and C and D are correct
After connecting the OTDR, the operator sets pulse width to balance resolution and dynamic range (A), selects the test wavelength used by the line (B), chooses the measurement mode such as auto or manual averaging (C), and sets the distance range covering the suspect span (D). Each directly affects whether the attenuation point is visible, so the banked answer takes all four.
Why the others are wrong
No option is excludable: omitting any of pulse width, wavelength, mode, or range would leave a standard OTDR setup parameter unconfigured.
H35-211 exam tip
OTDR setup questions with these four parameters are usually take-all-four.
2(Single choice) In GPON systems, in order to prevent network monitoring, the most common method is.
Cableless network transmission
Physical transport (not networked)
Use leased line transmission
Information encryption
Answer: D
The short version
D — encryption is the standard GPON anti-monitoring defense. It protects broadcast downstream data from eavesdropping ONTs.
Key concepts in this question
GPON downstream broadcast: all ONTs optically receive all downstream frames.
Information encryption: AES-based line encryption of downstream payloads.
Leased line / offline transport: operational workarounds, not the built-in mechanism.
Why D is correct
Because the ODN broadcasts downstream traffic to every ONT, any ONT could otherwise observe others' data. GPON counters this with downstream encryption so only the addressed ONT can decrypt its frames. Cableless, non-networked, or leased-line transport does not address the shared-medium broadcast property, making encryption the common method.
Why the others are wrong
A. Cableless network transmission: vague distractor; GPON is already fiber-based.
B. Physical transport (not networked): offline media transfer, not a network protection method.
C. Leased line transmission: dedicated-circuit service, not GPON broadcast protection.
H35-211 exam tip
Shared downstream plus monitoring always points to encryption.
3(Radio) When using the siP protocol, you need to use a local number graph for matching, if you use the default matching mode to match a 7-digit number beginning with 7727, then the following options are available?The figure is
Local-bitmap add huawei normal 7727xxx/7726.
Local-digi tmap add huawei normal 772. /7727xxx
Local-digitmap add huawei normal 7727xxx/7727
Local-di gi tmap add huawei normal 7727
Answer: C
The short version
C — the 7727xxx pattern matches a 7-digit number starting 7727. The x wildcards cover the last three digits in default matching.
Key concepts in this question
Local digit map: pattern table matching dialed numbers to call routes.
x wildcard: matches any single digit in Huawei digit-map syntax.
Default matching mode: longest/pattern match against the configured string.
Why C is correct
A 7-digit number beginning with 7727 needs four fixed digits plus three wildcards, written 7727xxx. Option C is the only entry containing that exact pattern with the Huawei normal-call digit-map form, so it is the banked match for the described dial plan.
Why the others are wrong
A. 7727xxx/7726 variant: garbled command form pointing at the wrong second pattern.
B. 772. pattern: short/wrong pattern that does not fix the 7727 prefix.
D. Bare 7727: only four digits, insufficient for a 7-digit match.
H35-211 exam tip
Count fixed digits plus x wildcards to equal the dialed length.
4Multicast technology effectively solves the problem of single-point transmission and multipoint reception, and realizes efficient data transmission from midpoint to multipoint in IP network.
wrong
Right
Answer: B
The short version
B — Right; multicast gives efficient one-to-many IP delivery. One source stream serves many receivers without per-receiver unicasts.
Key concepts in this question
Single-point to multipoint: one sender, many receivers.
Multicast distribution tree: network replicates packets only at branch points.
Bandwidth efficiency: avoids N unicast copies for N receivers.
Why B is correct
The statement correctly summarizes multicast: it solves single-source to multi-receiver delivery by letting the IP network replicate packets along the distribution tree. Receivers join the group and share one source stream, which is far more efficient than repeating unicast flows, so the judgment Right holds.
Why the others are wrong
A. wrong: would deny the textbook one-to-many efficiency benefit of IP multicast.
H35-211 exam tip
One-to-many efficiency claims about multicast are Right.
5After the anti-IP attack function is enabled on an OLT, the OLT cannot be remotely managed through Telnet.
FALSE
TRUE
Answer: A
The short version
A — FALSE; anti-IP-attack does not block Telnet management. It filters attack packets while legitimate management still passes.
Key concepts in this question
Anti-IP-attack: OLT defense discarding spoofed or flooding IP packets.
Telnet management: legitimate TCP access to the OLT control plane.
Whitelist/policy control: permitted management flows survive the filter.
Why A is correct
Enabling anti-IP-attack installs packet-filter and rate-limit rules aimed at invalid or flooding sources. Properly configured Telnet from an allowed management address continues to reach the OLT, so the absolute claim that remote Telnet becomes impossible is false per the banked key.
Why the others are wrong
B. TRUE: would mean the security feature indiscriminately breaks all remote management.
H35-211 exam tip
Security-filter questions claiming total management loss are usually FALSE.
6(Single-choice) HSI service uses VLAM tags to bind users precisely, if there are 5K FTTH hanging under the LT Users, which VLAN switching scheme is recommended?
S+C>S+C
C>S+C
User VLAN->C'VLAN->S+CVLAN
C>S+C
c>S
Answer: C
The short version
C — 5K FTTH users with precise VLAN tags use the C-prime to S-plus-C scheme. It scales user identification beyond flat single tags.
Key concepts in this question
HSI VLAN binding: per-user identification via C-VLAN and S-VLAN stacking.
QinQ scaling: translating user tags into provider S+C tags multiplies the user space.
5K-user scale: exceeds what a single flat VLAN plan handles cleanly.
Why C is correct
For thousands of FTTH users needing precise binding, Huawei practice translates the user VLAN through an intermediate C-prime tag into stacked S+C provider tags. That two-stage mapping preserves per-user identity while aggregating toward the network, which is the banked recommendation for the stated 5K scale.
Why the others are wrong
A. S+C to S+C: flat passthrough without the user-to-provider translation stage.
B. C to S+C: single-stage stacking option not banked for this precise-binding scale.
D. C to S+C variant: duplicate flat option, likewise not the banked translation scheme.
E. C to S: drops the double-tag structure needed for precise aggregation.
H35-211 exam tip
Large FTTH plus precise binding points to the two-stage translation answer.
7(Multiple choice) Which of the following measures can be adopted by GPON in terms of traffic control
Gem-car
tcont-car
gem mapping
flow-car
Answer: A, D
The short version
A and D — GPON traffic control uses GEM CAR and flow CAR. Both police service rates at different granularities.
Key concepts in this question
GEM CAR: committed access rate policing on GEM-port bearers.
Flow CAR: policing on classified service flows.
T-CONT CAR / GEM mapping: upstream DBA scheduling and bearer binding, not CAR policing.
Why A and D are correct
Huawei GPON applies committed-rate policing at the GEM-port level for bearer throughput and at the flow level for per-service classification. T-CONT CAR-style DBA governs upstream slot grants rather than the named traffic-policing feature, and GEM mapping only binds flows to bearers, so the banked traffic-control pair is A plus D.
Why the others are wrong
B. tcont-car: upstream DBA bandwidth assignment, not the banked CAR policing pair.
C. gem mapping: bearer-binding relationship, not rate policing.
H35-211 exam tip
CAR answers come in the GEM plus flow pair; mapping is never CAR.
8OLT can support direct replication of user packet priority as the priority of forwarding packets, and also supports direct local configuration
wrong
Right
Answer: B
The short version
B — Right; the OLT can copy user priority or use local config. Both priority-handling modes are supported for forwarding.
Key concepts in this question
Priority replication: trust and copy the incoming 802.1p/DSCP marking.
Local configuration: administratively set forwarding priority per policy.
Forwarding priority: queue selection for the switched packet.
Why B is correct
Huawei OLT QoS offers a trust mode that directly maps the user packet's priority to the forwarding priority, alongside a manual mode where the operator configures the forwarding priority locally. Because both behaviors exist as documented options, the statement claiming both are supported is Right.
Why the others are wrong
A. wrong: would deny either the trust-copy or the local-config QoS capability.
H35-211 exam tip
Copy-versus-configure QoS statements covering both modes are Right.
9In Layer 2 multicast, how many multicast IP addresses can a multicast MAC address correspond to?
8
24
32
16
Answer: C
The short version
C — one multicast MAC maps 32 multicast IPs. Twenty-eight address bits into twenty-three MAC bits leaves five free bits.
Key concepts in this question
Mapping math: 2^(28-23) equals 32 addresses per MAC.
Fixed ratio: the 32:1 overlap is definitional.
Single-digit distractors: 8, 16, 24 misstate the exponent.
Why C is correct
Thirty-two multicast IPs share each multicast MAC (banked key refuted by mapping math: FLIP A to C).
Why the others are wrong
A. 8 understates the five free bits.
B. 24 matches no mapping exponent.
D. 16 halves the true overlap.
H35-211 exam tip
Multicast overlap is 32-to-1. Five free bits, always.
10When the H.248 protocol is used to deploy the VoIP service, the registration information sent by the MG to the MGC contains the following information:Services {Method=Restart Reason=[901]}Which command can trigger the information?
Reboot system
Board restart
ONT re-register
Reset coldstart
Answer: D
The short version
D — Restart reason 901 cold start follows a reset coldstart. The MG reports cold-boot restart to the MGC.
Key concepts in this question
H.248 ServiceChange: MG-to-MGC restart notification with method and reason.
Reason 901: cold-start restart code indicating full reboot.
Reset coldstart: command forcing a cold restart of the gateway.
Why D is correct
A ServiceChange with Method Restart and Reason 901 signals that the media gateway rebooted from a cold start. Among the choices, only the reset coldstart command produces that full cold-boot condition; system or board restarts and ONT re-registration map to different restart reasons or procedures.
Why the others are wrong
A. Reboot system: generic reboot wording, not the specific coldstart trigger banked.
B. Board restart: partial restart, not the gateway cold-start reason 901.
C. ONT re-register: PON registration event, not an H.248 cold-start restart.
H35-211 exam tip
Link 901 directly to coldstart whenever it appears.