Huawei H19-338 HCSP-Presales-Storage Exam Practice Test

Compared with common Ethernet, the NOF+ scenario greatly improves usability and reliability. According to the Huawei CloudFabric Data Center Network Solution White Paper, NOF+ (Network-Oriented Fabric+) is a data center network architecture that supports both Layer 2 and Layer 3 connectivity between servers and leaf nodes. NOF+ uses VXLAN technology to create overlay networks on top of theunderlay network, which improves network scalability, flexibility, and security. NOF+ also uses M-LAG technology to provide link redundancy and load balancing between leaf nodes and servers, which improves network availability and performance.

The maximum single-radio rate supported by Wi-Fi 6 products is 9.6 Gbit/s. This is achieved by using 1024-QAM modulation, 160 MHz channel bandwidth, and 8 spatial streams1

AirEngine 6760R-51E is a Wi-Fi 6 AP designed for rail transit scenarios. It supports 8x8 MU-MIMO and eight spatial streams, achieving a rate of up to 5.95 Gbit/s2. AirEngine 6761-21T is a Wi-Fi 6 AP designed for indoor scenarios such as offices and classrooms. AirEngine 6760-X1E is a Wi-Fi 6 AP designed for indoor scenarios such as hotels and shopping malls. AirEngine 6760-51EI is a Wi-Fi 6 AP designed for indoor scenarios such as stadiums and exhibition halls.

Huawei AirEngine 8760X1-PRO is not Huawei’s flagship Wi-Fi 6 model. According to the Huawei AirEngine Wi-Fi 6 Solution White Paper, Huawei AirEngine 8760X1-PRO is a high-performance Wi-Fi 6 AP that supports 16 spatial streams and a rate of up to 10.75 Gbit/s, but it is not the flagship model. The flagship model is Huawei AirEngine 8760R-PRO, which supports 24 spatial streams and a rate of up to 16.13 Gbit/s.

The leader AP does not establish a CAPWAP tunnel with the fit AP. The leader AP communicates with the fit AP through the management VLAN, and the fit AP establishes a CAPWAP tunnel with the AC. In tunnel forwarding mode, user traffic needs to pass through the leader AP. In direct forwarding mode, user traffic is directly transmitted from the AP egress rather than from the leader AP. In tunnel forwarding mode, the leader AP can manage more fit APs than in direct forwarding mode.

The CloudEngine S5736-S is a new-generation 10GE multi-rate switch launched by Huawei. It supports native AC (Access Controller) function, which enables it to manage up to 1024 APs and provide wireless services for up to 16K users.

The technology that is not recommended for data centers is 802.1x. This is because 802.1x is a port-based authentication protocol that requires each device to be authenticated before accessing the network. This can cause delays and complexity in data center environments where there are many devices and high-speed connections2

Huawei Wi-Fi 6 products implement 10 ms ultra-fast roaming for all terminals, not only Huawei terminals, by introducing a cache mechanism, ensuring that there is no frame freezing during roaming. According to the Huawei AirEngine Wi-Fi 6 Solution White Paper, Huawei Wi-Fi 6 products use a cache mechanism to store user information on APs and switches, which enables fast authentication and reconnection when users roam between APs. This mechanism is compatible with all terminals that support IEEE 802.11k/v/r standards.

The CloudEngine 16800 series switches do not support 4, 8, 12, and 16 LPU slots. According to the CloudEngine 16800 Series Data Center Switches Datasheet, CloudEngine 16800 series switches support three models: CE16804 (4 LPU slots), CE16808 (8 LPU slots), and CE16816 (16 LPU slots). There is no model that supports 12 LPU slots.

The redundancy design of key components of the S12700E series switches can achieve 99.999% reliability. According to the CloudEngine S12700E Series Switches Datasheet, CloudEngine S12700E series switches support N+1 backup for MPUs, SFUs, CMUs, and power modules, as well as hot swapping for all components, ensuring high availability and reliability.

RU-5G-101 supports independent deployment. According to the Huawei RU-5G-101 Datasheet2, RU-5G-101 is a high-speed wireless WAN access component that provides 5G wireless broadband access services for enterprises to implement wireless high-bandwidth data transmission. An RU-5G can be deployed independently to provide basic router functions.

The WAN-side controller can manage only WAN services, not LAN services. The LAN-side controller can manage both LAN and WAN services. This is because the LAN-side controller supports both SD-WAN and SD-Campus functions, while the WAN-side controller only supports SD-WAN functions.

 NE8000 X4 and X8 are high-end core routers designed for large-scale IP backbone networks, data centers, and metro networks . They support various redundancy designs to ensure high availability and reliability, such as MPU (Main Processing Unit) 1+1 backup, SFU (Switch Fabric Unit) 7+1 backup, and PEM (Power Entry Module) 1+1 backup . MPU 1+1 backup means that two MPUs work in active/standbymode and provide control plane redundancy . SFU 7+1 backup means that eight SFUs work in N+1 mode and provide data plane redundancy . PEM 1+1 backup means that two PEMs work in active/standby mode and provide power supply redundancy . The NE8000 X4 and X8 do not support power supply 9+1 backup, which is a feature of the NE8000 X16 router .

HQoS (Hierarchical Quality of Service) is a technology that provides hierarchical per-user-per-service scheduling and quality guarantee for VIP users and high-priority services. HQoS can implement fine-grained traffic control and service differentiation based on user groups, service types, and service priorities. The control device and access device are not virtualized into one device by HQoS.

WPA3 is a new security protocol for wireless networks that provides enhanced security and privacy features compared to WPA2 . One of the advantages of WPA3 is that it eliminates the potential for dictionary attacks, which are a type of brute-force attack that tries to guess passwords by using a list of common words or phrases . WPA3 uses a more robust authentication mechanism called Simultaneous Authentication of Equals (SAE), which prevents offline password cracking attempts . The other statements are correct advantages of WPA3. WPA3 can encrypt data on open SSIDs using Opportunistic Wireless Encryption (OWE), which creates a unique encryption key for each user without requiring any credentials . WPA3 also meets the NSA/SuiteB security requirements of governments and banks, which specify the use of strong encryption algorithms such as AES-256 and Elliptic Curve Cryptography (ECC) . WPA3 also ensures that even if an attacker obtains the intermediate key during the handshake process, they cannot decrypt the data or derive the session key, thanks to a feature called forward secrecy .

Spine nodes are core nodes on the fabric network, but they do need to support VXLAN in some scenarios. According to the Data Center Networking: What It Is, Why It Matters, And Types article, VXLAN is a tunnel encapsulation technology that allows overlay networks to be created on top of the underlay network. Spine nodes need to support VXLAN when they act as gateways between different overlay networks or between overlay and underlay networks.

NE8000 M1A and F1A are not both 220 mm deep. According to the Huawei NetEngine 8000 M14 Routers Support Guide, NE8000 M1A is 220 mm deep, but NE8000 F1A is 400 mm deep.

M-LAG (Multi-Chassis Link Aggregation Group) is the recommended networking mode for leaf switches. According to the Huawei CloudFabric Data Center Network Solution White Paper, M-LAG enables multiple leaf switches to form a logical device that provides high availability, load balancing, and simplified management.