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Huawei H12-891_V1.0 Exam Syllabus Topics:

Section	Objectives
Topic 1: Enterprise Network Architecture	- Network design principles 1. Scalability and high availability design 2. Hierarchical network architecture
Topic 2: WAN and VPN Technologies	- MPLS fundamentals 1. MPLS LDP and forwarding 2. VPN technologies
Topic 3: Network Security and QoS	- Security mechanisms 1. ACL and traffic control 2. Basic network security design - QoS mechanisms 1. Traffic classification and shaping
Topic 4: Network Automation and Programmability	- SDN and automation 1. Network automation tools 2. NETCONF/YANG basics
Topic 5: Routing and Switching Technologies	- IP routing protocols 1. OSPF 2. BGP 3. IS-IS basics - Switching technologies 1. Ethernet switching mechanisms 2. VLAN and STP
Topic 6: IPv6 and Advanced IP Technologies	- IPv6 deployment 1. IPv6 addressing and transition
Topic 7: Data Center and Virtualization Technologies	- VXLAN and overlay networks 1. Data center network virtualization

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Huawei HCIE-Datacom V1.0 Sample Questions (Q302-Q307):

NEW QUESTION # 302
Assuming that the shaping rate of a port is 10OMbps, the input loans and RIP of P configurations of each service of the interface are as follows: Then after the first round of scheduling, EF How many loans are allocated by the queue?( Single choice questions).

A. 90M
B. 15M
C. 30M
D. 25M

Answer: D

NEW QUESTION # 303
Regarding the sliding window of TCP, what are the following descriptions that are enough to be wrong? ( Multiple choice question)

A. The TCP sliding window allows multiple packets to be sent before an acknowledgment is received
B. The receiver needs to acknowledge the sender's packet
C. The sender declares the initial window size
D. Sliding window size can only be increased or remain unchanged
E. After the retransmission timer times out, the sender has not received an acknowledgment and will retransmit unacknowledged data
F. The sender does not need to transmit messages of full window size

Answer: C,D

NEW QUESTION # 304
Fill in Blank
As shown in the figure, a sham link is established between PE1 and PE2 through the loopback interfaces. CE2 can learn the 192.168.1.0/24 route (directed route on CE1) through the sham link and backdoor link. If other parameters use their default settings, the cost of the 192.168.1.0/24 route on CE2 should be ______. (Enter an Arabic numeral without symbols.)

Answer:

Explanation:
20
Explanation:
This is a classic MPLS L3VPN with OSPF + Sham Link scenario.Key Components:CE1 to PE1 (GE0/0/0): OSPF cost = 10CE2 to PE2 (GE0/0/0): OSPF cost = 10PE1 to PE2 via Sham Link (over loopback interfaces)What happens:CE1 advertises 192.168.1.0/24 to PE1.PE1 redistributes it into the VPNv4 BGP routing table.PE2 learns this route and redistributes it back into OSPF for CE2.Route Options Seen by CE2:Backdoor link (intra-area):CE1 ↔ CE2 directly, via GE0/0/1 on each CE → OSPF cost = 10 + 10 = 20Sham Link (inter-area route): By default, if no sham link is used, the BGP-learned route is treated as an inter-area route by CE2, with a default OSPF cost of 1 (which would make CE2 prefer this over the real CE-CE backdoor link).Purpose of Sham Link:Sham link is configured to equalize or override the cost of the BGP route so that CE2 prefers the backdoor link or sees both paths equally.In this case, Huawei defaults will cause CE2 to compute the total cost as:PE1-CE1 = 10Sham link route via PE1-PE2-CE2 = also 10 (CE1 to PE1) + 10 (PE2 to CE2) = 20Final OSPF Cost Calculation at CE2:Route learned via sham link path: 10 (CE1 to PE1) + 10 (PE2 to CE2) = 20Correct answer: 20In Huawei MPLS L3VPN OSPF deployment:A sham link ensures that the cost via the MPLS VPN path is comparable to the real CE-to-CE OSPF backdoor path, preventing suboptimal routing.Without sham link: BGP redistributed routes appear as inter-area Type 3 LSAs with low cost (usually 1).With sham link: Route appears as intra-area and OSPF calculates true cost based on interface metrics.
Reference:
Huawei HCIE-Datacom V1.0 Study GuideChapter: MPLS L3VPN Integration with OSPFSection: Sham Link Design and Cost Calculation

NEW QUESTION # 305
Which of the following sequences can be matched by the regular expression [

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