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

Comprehensive and Detailed Explanation:
# Fit APs require additional configurations before going online, such as:
* AP authentication and onboarding through DHCP Option 148 or manual registration.
* Firmware upgrade and provisioning from iMaster NCE-Campus.
* Policy enforcement and VLAN assignment.
Since additional steps are required, Fit APs do not go online immediately, making the statement FALSE.
# Reference: Huawei HCIE Datacom - AP Registration and Authentication

Explanation:
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.