IPv6 introduces the Solicited-Node address, which is described correctly below (multiple choice)
Correct Answer: B
Question 92
Configuration under a certain interface: isis timer hello 5 level-2, the following statement is correct?
Correct Answer: B
Question 93
Drag theIPsec functionson the left to the corresponding function description on the right.
Correct Answer:
A screenshot of a computer AI-generated content may be incorrect. IPsec (Internet Protocol Security) provides secure communication over IP networks through several essential functions. Let's explain each function and its purpose: 1. Data Origin Authentication: Description:The receiver verifies the identity of the sender. This function ensures that the data received actually comes from the claimed source. IPsec achieves this usingIKE (Internet Key Exchange)anddigital signatures. TheAuthentication Header (AH)andEncapsulating Security Payload (ESP)support authentication. Use Case:Verifying that a message claiming to be from a specific IP address is genuinely from that source. 2. Data Encryption: Description:The sender encrypts the data, and the receiver decrypts the data. Encryption ensuresdata confidentialityby transforming readable data (plaintext) into unreadable data (ciphertext). Only the intended receiver with the correct decryption key can convert the ciphertext back to plaintext. Common encryption algorithms used includeAES (Advanced Encryption Standard)andDES (Data Encryption Standard). Use Case:Protecting sensitive data transferred over public networks. 3. Data Integrity: Description:The receiver verifies received data to determine whether the data has been tampered with. Ensures that the data was not altered during transmission. Uses cryptographichash functions(e.g.,SHA-1, SHA-256) to generate amessage digest. The digest is sent with the data and verified on the receiving side. Use Case:Detecting any changes made to the data packet during transmission. 4. Anti-Replay: Description:The receiver rejects duplicate data packets. Prevents attackers from capturing packets and replaying them later. Usessequence numbersto detect replayed or duplicated packets. The receiver keeps asliding windowof sequence numbers to compare incoming packets. Use Case:Blocking malicious actors from sending previously intercepted packets to disrupt communication. Why This Mapping Is Correct: The functions and descriptions are aligned based on the core concepts of IPsec and the roles they play in ensuring secure data transmission. Each function addresses a specific aspect of security:authentication, confidentiality, integrity, and replay protection. References: Huawei HCIE-Datacom V1.0 Training Materials Huawei Official Documentation: IPsec Configuration Guide RFC 4301 - Security Architecture for IPsec HCIE-Datacom Knowledge Base: IPsec VPN Concepts
Question 94
As shown in the figure, when PE1 receives an ARP request packet, it forwards the packet to PE4. The packet then carries two labels. The label value 201 is carried by the EVPN Type ____ route. (Enter only digits.)
Correct Answer:
3 Explanation: Understanding EVPN (Ethernet VPN) Label Allocation and ARP Handling # What Happens in This Scenario? 1##CE1 (192.168.1.1) sends an ARP request to discover the MAC address of CE2 (192.168.1.2). 2##PE1 receives the ARP request and needs to forward it over the EVPN fabric. 3##To send the broadcast ARP request across the EVPN network, PE1 forwards the packet to PE4 using BUM (Broadcast, Unknown unicast, and Multicast) forwarding. 4##PE4, as the Designated Forwarder (DF), forwards the ARP request to CE2. Role of Labels in EVPN VXLAN/MPLS Networks # EVPN uses BGP to distribute MAC/IP reachability information using different route types. #EVPN Type 2 Route (MAC/IP Advertisement Route): Used forMAC-to-IP address mappingannouncements. Ensuresremote VTEPs (PE routers) learn MAC-to-IP bindingsdynamically. #EVPN Type 3 Route (Inclusive Multicast Route): Used forBUM traffic (Broadcast, Unknown Unicast, Multicast). Assigns a multicast label (e.g., 201) to be used for forwarding broadcast packets like ARP requests. # In this case: Thelabel 201is used forBUM traffic forwarding. BUM traffic is handled using an EVPN Type 3 route. Why is the Answer 3? #EVPN Type 3 routes carry labels for BUM traffic, which includes ARP requests. #Label 201 is used for multicast distribution, which is managed by Type 3 routes. Real-World Application: VXLAN Data Centers:UsesEVPN Type 3 routes to control BUM traffic efficiently. Campus Networks:Preventsunnecessary flooding of ARP requests across VXLAN domains. #Reference:Huawei HCIE-Datacom Guide - EVPN BGP Route Types and Multicast Labeling
Question 95
In theHuawei CloudCampus Solution, which of the following devices can go online through theregistration query center?
Correct Answer: A,B,C,D
Comprehensive and Detailed Explanation: TheHuawei Registration Query Centerallows devices to register and go online automatically in acloud- managed environment. #Supported Devices: Switches# Access Routers (AR)# Access Points (APs)# Firewalls# #How It Works: Devices obtain theirregistration informationviaDHCP Option 148orpre-configured credentials. The devices thenconnect to the registration query centerto retrieve configuration and authentication details. Once authenticated, they goonline and become manageable via iMaster NCE-Campus. #Reference:Huawei HCIE Datacom - CloudCampus Device Registration
