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| Section | Objectives |
|---|---|
| Topic 1: Campus SD-WAN Planning and Design | - SD-WAN Solutions
|
| Topic 2: Industry Scenario Solution Design | - Industry-Oriented Campus Solutions
|
| Topic 3: Huawei Campus Network Products and Solutions | - Campus Network Product Portfolio
|
| Topic 4: CloudCampus and Intelligent Campus Solutions | - CloudCampus Architecture
|
| Topic 5: Campus Network Security Design | - Security Planning
|
| Topic 6: Campus WLAN Planning and Design | - WLAN Technologies
|
| Topic 7: Campus Network Solution Architecture and Design | - Enterprise Campus Network Architecture
|
| Topic 8: Pre-sales Methodology and Solution Presentation | - Pre-sales Skills
|
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NEW QUESTION # 53
Huawei provides an innovative technology that can maintain smooth video when traffic packet loss between enterprise branches reaches up to 20%. Which technology provides this capability?
Answer: B
Explanation:
A-FEC, or Adaptive Forward Error Correction, is the correct technology. It protects delay-sensitive traffic by adding calculated redundant packets to the original packet stream. If some original packets are lost during WAN transmission, the receiving edge device can reconstruct them using the surviving original and redundant packets rather than waiting for end-to-end retransmission.
The key distinction between ordinary FEC and A-FEC is adaptation. With A-FEC, the receiving device reports real-time packet-loss and continuous-loss information to the transmitting device through FEC acknowledgement messages. The transmitting edge then dynamically increases or decreases the redundancy ratio according to actual network conditions. This provides stronger recovery during severe loss while avoiding unnecessary bandwidth overhead when link quality improves. Huawei describes this feedback- controlled adjustment as a mechanism that can alleviate or eliminate the impact of packet loss.
IFIT and IPCA are primarily measurement and service-quality analysis technologies; they do not reconstruct lost video packets. Fixed FEC does not adapt its redundancy level as effectively to changing loss conditions.
Therefore, the technology intended for smooth video under packet loss of up to 20% is A-FEC.
NEW QUESTION # 54
Which of the following BGP NLRI address-family combinations is used to transmit SD-WAN tunnel encapsulation information?
Answer: C
Explanation:
AFI 1 with SAFI 74 is the correct combination. In Multiprotocol BGP, the Address Family Identifier defines the basic network-layer address family, while the Subsequent Address Family Identifier specifies how the associated NLRI is interpreted. AFI 1 represents IPv4. SAFI 74 is assigned for SD-WAN capabilities and is used to distribute information required for SD-WAN edge discovery and tunnel establishment, including transport and encapsulation-related attributes.
The other combinations represent different forms of reachability information. AFI 1/SAFI 1 is ordinary IPv4 unicast NLRI. AFI 1/SAFI 2 represents IPv4 multicast reachability. AFI 25 represents Layer 2 VPN information, while SAFI 70 represents Ethernet VPN routes; that combination is associated with EVPN rather than the specific SD-WAN capability NLRI requested.
Huawei's architecture uses BGP-based control channels to exchange transport network port information, IPsec security-association information, and service routes. These parameters allow edge devices to determine peer endpoints and create GRE or GRE-over-IPsec data channels after the relevant service routes trigger tunnel establishment.
NEW QUESTION # 55
Which of the following wireless security standards was proposed by China?
Answer: C
Explanation:
WAPI, or WLAN Authentication and Privacy Infrastructure, is the wireless LAN security standard proposed by China. It provides wireless link authentication and data-protection mechanisms and was developed as an alternative security framework for WLAN environments. Huawei's training material explicitly identifies WAPI as a WLAN security standard proposed in China and states that it provides stronger protection than legacy WEP and WPA mechanisms.
WPA, WPA2, and WPA3 belong to the Wi-Fi Protected Access family maintained through Wi-Fi industry certification. WPA was introduced as an interim improvement over WEP. WPA2 adopted stronger IEEE
802.11i security mechanisms, including AES-based CCMP. WPA3 later introduced stronger password- authentication and enterprise-security options.
WAPI incorporates authentication and encryption as part of an integrated wireless security architecture. Its deployment depends on regional requirements, terminal compatibility, AP support, and the organization's regulatory or cryptographic-policy obligations. The question asks which standard originated as a Chinese wireless security standard, not which standard is most widely deployed internationally. Therefore, WAPI is the only correct choice, making option B the verified answer.
NEW QUESTION # 56
Which of the following statements are true about traffic encryption on SD-WAN links?
Answer: B,C
Explanation:
Huawei SD-WAN allows encryption to be controlled by virtual network and by specific device relationships.
When encryption is enabled for a VN, the overlay data channels carrying that VN's traffic use IPsec protection across the relevant WAN links. This provides consistent isolation and confidentiality for the department or service represented by that VN.
Encryption can also be enabled between selected devices or sites. In that case, secure data channels are established for traffic exchanged between those specified endpoints, while other device relationships can continue using GRE without IPsec according to their policies.
Application-specific encryption, as described in option C, is not the supported control granularity. Application identification can influence intelligent traffic steering, QoS, and security-policy selection, but it does not mean that only the payload of a selected application is independently encrypted inside an otherwise unencrypted SD-WAN tunnel.
A transport network is an underlay WAN such as MPLS or the Internet. Enabling encryption is an overlay tunnel policy rather than a mechanism that encrypts all traffic belonging to an entire TN. Huawei distinguishes TNs as underlay networks and GRE or IPsec VPNs as overlay data channels. Therefore, only A and B are correct.
NEW QUESTION # 57
Which of the following WLAN networking solutions is recommended when there are 15,000 wireless terminals on the customer network?
Answer: A
NEW QUESTION # 58
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