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The Huawei H12-891_V1.0 exam covers a wide range of topics, including network design principles, network virtualization, data center network design, network security, network management, and network troubleshooting. H12-891_V1.0 exam consists of both theoretical and practical components, which test the candidate's ability to apply their knowledge and skills to real-world scenarios.
Huawei H12-891_V1.0 certification exam is an excellent opportunity for IT professionals who want to become experts in datacom technology. HCIE-Datacom V1.0 certification is highly valued in the IT industry, and it can help candidates to advance their career and increase their earning potential. With the right preparation and dedication, candidates can pass H12-891_V1.0 exam and become HCIE-Datacom V1.0 certified.
NEW QUESTION # 16
As shown in the figure,
in the context of IPv4 and IPv6, the SEL field in the NET address of the ISIS is always valued as 00?
- A. True
- B. False
Answer: A
NEW QUESTION # 17
In a network in MPLSVPN, different CE devices can exchange routing information with the same PE device using different routing protocols, and different CE devices can exchange routing information with the same PE The routing protocols used between devices are independent of each other
- A. True
- B. False
Answer: A
NEW QUESTION # 18
The naming of SRv6 instructions complies with certain rules. You can quickly determine the function of an instruction based on the instruction name. Which of the following statements about the keywords in SRv6 instruction names are correct?
- A. T: searches a specified routing table to forward packets.
- B. V: searches a VPN instance routing table to forward packets.
- C. X: forwards packets through one or a group of specified Layer 3 interfaces.
- D. M: searches a Layer 2 forwarding table for unicast forwarding.
Answer: A,B,C
Explanation:
SRv6 Instruction Naming Conventions
SRv6 (Segment Routing over IPv6) uses segment identifiers (SIDs) with specific functions, indicated by instruction keywords:
# A. T: Searches a specified routing table to forward packets.
* T (Table Lookup) # Performs a lookup in a specified routing table and forwards packets accordingly.
# B. M: Searches a Layer 2 forwarding table for unicast forwarding.
* Incorrect! SRv6 does not use M for Layer 2 unicast forwarding.
# C. V: Searches a VPN instance routing table to forward packets.
* V (VPN Routing Table Lookup) # Performs a lookup in a VPN instance (VRF) table for forwarding.
# D. X: Forwards packets through one or a group of specified Layer 3 interfaces.
* X (Cross-connect forwarding) # Forwards packets via a specified Layer 3 interface or group of interfaces.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei SRv6 Configuration Guide - SRv6 SID Naming and Instruction Set
* HCIE-Datacom Study Material - Segment Routing over IPv6 (SRv6) Functionality
NEW QUESTION # 19
Which of the following statements regarding RT are correct?
- A. Each VPN instance is associated with one or more pairs of VPN Target attributes, used to control VPN routing information advertisement and reception between sites.
- B. RTs are classified into two types: Export Target and Import Target.
- C. The RT value is advertised to neighbors through the BGP extended community attribute in Update messages.
- D. Export Target and Import Target are independent of each other and support multiple values to implement flexible VPN routing information advertisement and reception control.
Answer: A,B,C,D
Explanation:
Route Target (RT) is a BGP extended community attribute used in MPLS Layer 3 VPNs (L3VPNs) to control the import and export of VPN routes between different VPN instances (VRFs).
Explanation of Correct Answers:
# A. Each VPN instance is associated with one or more pairs of VPN Target attributes, used to control VPN routing information advertisement and reception between sites.
* Each VRF (VPN Routing and Forwarding instance) has an associated RT that determines which routes are imported and exported between VPNs.
* RTs enable inter-VPN communication while maintaining separation between VPN customers.
# B. Export Target and Import Target are independent of each other and support multiple values to implement flexible VPN routing information advertisement and reception control.
* The Export RT specifies which routes should be advertised.
* The Import RT specifies which routes should be accepted into a VRF.
* These can be configured independently to control traffic flow between VPNs.
# C. RTs are classified into two types: Export Target and Import Target.
* Export Target: Defines which VPN routes are advertised.
* Import Target: Defines which VPN routes are accepted.
* A VPN instance can have multiple RTs to allow flexibility.
# D. The RT value is advertised to neighbors through the BGP extended community attribute in Update messages.
* RTs are carried in BGP UPDATE messages as part of the BGP extended community attribute, enabling VPN route exchange between PEs.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei MPLS VPN Configuration Guide - Route Target (RT) Concepts
* HCIE-Datacom Study Material - BGP Route Advertisement in MPLS VPNs
NEW QUESTION # 20
Which of the following statements is incorrect about intranet security design for a large or medium-sized virtualized campus network?
- A. Traffic suppression can be configured on the wired network to block broadcast traffic by shutting down interfaces.
- B. In addition to terminal access security, air interface security must be considered during wireless network security design.
- C. Intranet security refers to both wired and wireless network security.
- D. To secure data transmission, the CAPWAP tunnel between the AC and AP supports DTLS encryption.
Answer: A
Explanation:
Comprehensive and Detailed Explanation:
# Traffic suppression is used to control broadcast storms, but shutting down interfaces is NOT the correct way to block broadcast traffic.
# Correct Statements:# (B) Intranet security covers both wired and wireless networks.# (C) CAPWAP tunnels use DTLS encryption for security.# (D) Wireless security requires air interface protection against attacks.
# Reference: Huawei HCIE Datacom - Intranet Security Design
NEW QUESTION # 21
OSPFv2 is an IGP running on IPv4 networks, whereas OSPFv3 is an IGP running on IPv6 networks. OSPFv2 and OSPFv3 have similar LSA types, but their LSA functions are slightly different. Which of the following is not an OSPFv3 LSA type?
- A. ASBR-Summary-LSA
- B. Network-LSA
- C. AS-External-LSA
- D. Router-LSA
Answer: A
Explanation:
Comprehensive and Detailed Explanation:
OSPFv2 (for IPv4) and OSPFv3 (for IPv6) LSAs differ in function and naming conventions.
Key Differences in OSPFv3 LSAs:
OSPFv3does not use ASBR-Summary-LSA. Instead, it introduces newInter-Area Prefix LSAs (Type 3) and Inter-Area Router LSAs (Type 4).
OSPFv2 ASBR-Summary-LSA (Type 4) is replaced in OSPFv3 by Inter-Area Router LSA (Type 4).
OSPFv3 LSA Types:
#Router-LSA (Type 1)- Describes router interfaces and links.
#Network-LSA (Type 2)- Describes broadcast network links.
#Inter-Area Prefix LSA (Type 3)- Replaces Summary LSAs for routes.
#Inter-Area Router LSA (Type 4)- Replaces ASBR Summary LSAs.
#AS-External LSA (Type 5)- Describes external routes (same as OSPFv2).
SinceASBR-Summary-LSA (Type 4) does not exist in OSPFv3, the correct answer isA.
#Reference:Huawei HCIE Datacom - OSPFv3 LSA Types
NEW QUESTION # 22
The correct statement about the VRRP protocol version is ?
- A. VRRPv3 is only available for IPv6
- B. VRRPv3 does not support authentication
- C. VRRPv2 is only available for IPv4
- D. VRRPv2 supports authentication
Answer: B,C,D
NEW QUESTION # 23
In a VXLAN scenario, which of the following features can be enabled to reduce ARP packet flooding between VTEPs?
- A. Local proxy ARP
- B. ARP broadcast suppression
- C. Port isolation
- D. Host information collection
Answer: A,B,D
Explanation:
VXLAN networkssuffer from ARP floodingbecause ARP requests arebroadcasted across all VTEPsin a Layer
2 domain. Toreduce ARP flooding, the following mechanisms can be enabled:
#A. Local Proxy ARP
Allows the local VTEP to respond to ARP requests without forwarding them across the VXLAN network.
The VTEPcaches MAC-IP mappingsand replies directly to ARP requests, reducing unnecessary flooding.
#B. ARP Broadcast Suppression
Converts ARP broadcast packets into unicast or multicast packetsto minimize network-wide flooding.
#C. Host Information Collection
Collects and stores MAC-IP bindings of endpoints, which can be used by proxy ARP to reduce flooding.
#D. Port Isolation
Port isolation prevents communication between devices within the same VLANbut doesnot help reduce ARP floodingbetween VTEPs.
Reference from Huawei HCIE-Datacom Documentation:
Huawei VXLAN Configuration Guide - ARP Optimization Techniques
HCIE-Datacom Training Material - Reducing ARP Broadcasts in VXLAN Networks
NEW QUESTION # 24
Router HW enables OSPF and router HW has the role of ABR and is configured with abr-summary, so which class LSA Will it be aggregated?( Multi-select) (confirmed).
- A. 1 ?LSA
- B. 5 ?LSA
- C. 2 ?LSA
- D. 4 ?LSA
- E. 3 ?LSA
Answer: A,C
NEW QUESTION # 25
What messages does an NMS (Network Management Station) running SNMPv1 send to the agent?
- A. Get Trap
- B. Get,Set ? Getnext
- C. Trap,Get ? Set
- D. Get,Set,Getnext ? GetBulk
- E. Get,Set ? GetBulk
Answer: B
NEW QUESTION # 26
A network administrator needs to retrieve atoken IDfromiMaster NCEusing the following Python code:
import requests
nbi_name = "[email protected]"
nbi_pwd = "qqcOVcVel@"
host = "139.9.213.72"
port = "18002"
URI = "/controller/v2/tokens"
post_token_url = "https://" + host + ":" + port + URI
headers_post = {'Content-Type': 'application/json', 'Accept': 'application/json'} r = requests.post(post_token_url, headers=headers_post, json={"userName": nbi_name, "password":
nbi_pwd}, verify=incorrect)
Which of the following statements is incorrect?
- A. The request body is inJSON format.
- B. Token resources are located at https://139.9.213.72:18002/controller/v2/tokens.
- C. The HTTP request uses the GET method to query the token value.
- D. You can run print(r.json()) to display the response message sent from the server.
Answer: C
Explanation:
Comprehensive and Detailed Explanation:
#Analyzing the Python Code:
#(A) Correct# print(r.json()) prints the response JSON, showing thetoken ID.
#(B) Correct# The token request URL is correctly specified.
#(D) Correct# json={"userName": nbi_name, "password": nbi_pwd} confirms the requestbody is in JSON format.
#(C) Incorrect:
The requestuses POST, not GET (requests.post() is explicitly called).
#Reference:Huawei HCIE Datacom - RESTful API Authentication in iMaster NCE
NEW QUESTION # 27
For the description of firewall security zones, the following statement is correct?
- A. Different interfaces of the firewall can belong to the same security zone
- B. Different security zones of the firewall, the priority can be the same
- C. The same interface of a firewall can belong to different security zones
- D. The built-in security zone of the Firewall can be deleted
Answer: A
NEW QUESTION # 28
Regarding the domain-authentication-mode md5 hello command in the ISIS process, the correct explanation is
?
- A. This command is mainly used to make is the ISIS Hello message carry authentication information during the transmission process.
- B. ISIS authentication cannot be applied in IPv6 environments.
- C. outing domain authentication is primarily used to allow level-1 and Level-2 SNP and LSP messages to carry authentication information during delivery.
- D. All router domain authentication methods of the same routing domain are MD5, the password is hello, and lS-IS SNP and LSP will spread normally.
Answer: D
NEW QUESTION # 29
With an existing network running OSPF, what types of LSAs cause ISPF operations?
- A. 1 ?LSA
- B. 5 ?LSA
- C. 2 ?LSA
- D. 4 ?LSA
- E. 3 ?LSA
Answer: A,C
NEW QUESTION # 30
LDP messages are exchanged between LDLRs running the LDP protocol, and LDP messages can be divided into four types according to function, which of the following is not an LDP message type ?
- A. Advertisement message
- B. Label Exchange Information
- C. Discover message
- D. Conversation message
Answer: B
NEW QUESTION # 31
Regarding the BGP/MPLS IP VPN network architecture, what is the error described below?
- A. Under normal circumstances, CE devices are not aware of the presence of VPN, and CE devices do not need to support MPLS MP-BGP, etc
- B. BGP/MPLSIPVPN network architecture consists of CE (Customer Edge), PE (Provider Edge) and P (Provider), of which PE and P Is a carrier device, CE is BGP/MPLSIPVPN with Household equipment
- C. P devices only need basic MPLS forwarding capabilities and do not maintain VPN-related information
- D. sites can be accessed each other through vPNs, and a site can only belong to a VPN
Answer: D
NEW QUESTION # 32
What are the wrong statements about OSTPF's Router LSA and Network LSA?
- A. A router running OSPF must produce a Network LSA
- B. There must be both Router LSA and Network LSA in the OSPF network
- C. Network LSA carries both topology and routing information
- D. A router running OSPF must produce a Router LSA
Answer: A,B
NEW QUESTION # 33
The RSTP protocol provides a variety of protection functions, such as when the edge port is configured as a protection state, the edge port receives the BPDU packet processing method;
- A. After parsing the BPDU message, the relevant information is obtained
- B. Close the port
- C. Directly discard the BPDU packet
- D. Forward BPDU packets as required
Answer: B
NEW QUESTION # 34
An HTTP request line consists of three fields. Select the fields to form a complete HTTP request message.
Answer:
Explanation:
NEW QUESTION # 35
Which levels are common in the OSI reference model and the ICP/IP model? ( Multiple choice question)
- A. Session layer
- B. Application Layer
- C. Transmission layer
- D. Presentation Layer
- E. Data link layer
- F. Physical Layer
Answer: B,C
NEW QUESTION # 36
What commands are related to BGP route reflectors?( Multiple select).
- A. peer reflect-client
- B. reflect between-clients
- C. reflector cluster-id
- D. group 1 internal
Answer: A,B,C
NEW QUESTION # 37
Which of the followinguser logout modesare supported by802.1X authentication?
- A. An authentication server forces a user to log out.
- B. An access device forces a user to log out.
- C. An accounting server forces a user to log out.
- D. A user logs out manually.
Answer: A,B,D
Explanation:
Comprehensive and Detailed Explanation:
#802.1X authenticationsupportsmultiple logout mechanismsbased on network conditions and security policies.
#Correct Logout Modes:
#(A) Authentication Server Logout# The RADIUS server canterminatea session.
#(B) Manual Logout# Users candisconnect manually.
#(C) Access Device Logout# The switch/WLAN controller canenforce logouts(e.g., if inactivity is detected).
#Why Not (D)?
#(D) Accounting Server Logout# Theaccounting server tracks session usagebutdoes not enforce logouts.
#Reference:Huawei HCIE Datacom - 802.1X Authentication & Session Termination
NEW QUESTION # 38
The correct description about the prefix list is:
- A. The prefix list is used to filter P prefixes and can match both prefix numbers and prefix lengths
- B. The prefix list is used to filter IP prefixes, and cannot match both the prefix number and the prefix length
- C. The prefix list cannot be used for packet filtering
- D. The prefix list can be used to filter packets
Answer: A,C
NEW QUESTION # 39
Regarding the FTP protocol, which of the descriptions below is correct?
- A. In FTP Passive mode, the client completes the initialization of the TCP session for control and data
- B. FTP always uses a TCP session to transmit control information and data information
- C. FTP always uses TCP port 20 to establish a data session, and ICP port 21 to establish control will always use
- D. In FTP Active mode, the server tells the client which port it expects to send data on by commanding "PORT"
- E. FTP TCP port 21 to establish a data session, TCP port 20 to establish a control session
Answer: A
NEW QUESTION # 40
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