Comprehensive and Detailed Explanation:
* Host check policyis a security mechanism inSSL VPNto verifyterminal security compliancebefore granting access.
* It checks for:
* Antivirus software
* Operating system patches
* Running processes
* Security settings
* If the terminal fails the host check, access is denied.
* Why is this statement true?
* A successful host check is required before an SSL VPN session is allowed.
HCIP-Security References:
* Huawei HCIP-Security Guide # SSL VPN Host Check Policy

Understanding 802.1X Authentication in Wired Networks:
* 802.1X is a port-based network access control (PNAC) protocolthat requires aLayer 2 connection between thesupplicant (PC), the authenticator (switch), and the authentication server (e.g., RADIUS server).
* In wired networks,802.1X authentication occurs at the Ethernet switch (Layer 2 device), which enforces authenticationbefore allowing network access.
Why Must the Network Be Layer 2?
* 802.1X authentication operates at Layer 2 (Data Link Layer) before any IP-based communication (Layer 3) occurs.
* If the authentication device and user terminal were on different Layer 3 networks, the authentication packets (EAPOL - Extensible Authentication Protocol Over LAN)would not be forwarded.
* In the figure, the authentication control point is at theaggregation switch, which means thePC and switch must be in the same Layer 2 domain.
Components of 802.1X Authentication in the Figure:
* Supplicant (PC)# The device requesting network access.
* Authenticator (Aggregation Switch)# The switch controlling access to the network based on authentication results.
* Authentication Server (iMaster NCE-Campus & AD Server)# Verifies user credentials and grants or denies access.
* Layer 2 Connectivity Requirement# ThePC must be in the same Layer 2 networkas the Authenticatorto communicate via EAPOL.
Why "TRUE" is the Correct answer:
* 802.1X authentication is performed before IP addresses are assigned, meaning it can only operate in a Layer 2 network.
* EAPOL (Extensible Authentication Protocol Over LAN) messages are not routableand must stay within a single Layer 2 broadcast domain.
* In enterprise networks,VLAN-based 802.1X authentication is often used, where authenticated users are assigned to a specific VLAN.
HCIP-Security References:
* Huawei HCIP-Security Guide# 802.1X Authentication in Enterprise Networks
* Huawei iMaster NCE-Campus Documentation# Authentication Control and NAC Deployment
* IEEE 802.1X Standard Documentation# Layer 2 Network Authentication

Comprehensive and Detailed Explanation:
* IPsec VPN only supports IP unicast traffic.
* Non-IP unicast packets (such as multicast and broadcast) are not natively supported.
* To transmit multicast traffic over IPsec, GRE over IPsec is required.
* Why is this statement true?
* Standard IPsec VPN does not support non-IP unicast packets.
HCIP-Security References:
* Huawei HCIP-Security Guide # IPsec VPN Limitations

Comprehensive and Detailed Explanation:
* DDoS defense mechanisms rely on threshold settingsto distinguish between normal and attack traffic.
* Thresholds define:
* Maximumallowedtraffic volume.
* When exceeded, firewallstrigger mitigation actions(blocking, rate-limiting, etc.).
* Why is this statement true?
* Threshold-based detection is a fundamental part of DDoS mitigation.
HCIP-Security References:
* Huawei HCIP-Security Guide # DDoS Attack Prevention Thresholds

Understanding the Differences Between HWTACACS and RADIUS:
* HWTACACS(Huawei Terminal Access Controller Access-Control System) is aHuawei-enhanced version of TACACS+used forAAA (Authentication, Authorization, and Accounting).
* RADIUS (Remote Authentication Dial-In User Service)is also an AAA protocol but is mainly designed fornetwork access authentication, such asVPNs and wireless authentication.
Why is Option B Correct?
* HWTACACS supports per-command authorization, meaning administrators canassign different command privileges to different users.
* For example, ajunior network engineer may be allowed to view configurations but not modify them
, while asenior engineer has full access.
* RADIUS does not support granular command authorization, as it primarily controlsnetwork access rather than device management.