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NEW QUESTION # 243
SR-MPLS uses IGP extensions to advertise labels and reserve bandwidth to support high-bandwidth services.
Answer: A
Explanation:
SR-MPLS leverages IGP (OSPF/IS-IS) extensions to advertise Segment IDs (SIDs) and can also integrate with TE (Traffic Engineering) for bandwidth reservation using RSVP-TE or SR-TE.
Exact Extract - Huawei SR-MPLS Configuration Guide:
"SR-MPLS uses extensions in IGP to distribute label bindings and, combined with traffic engineering, supports bandwidth assurance and high-bandwidth services." Reference:
Huawei SR-MPLS Deployment Guide
HCIE-Datacom Training Manual - Traffic Engineering with SR
NEW QUESTION # 244
The correct description of configuring BGP4+ is that
Answer: B,C
NEW QUESTION # 245
The following about BGP routing, what is the wrong description?
Answer: C
NEW QUESTION # 246
To allow only authorized users (users who obtain IP addresses through authorized DHCP servers or use specified static IP addresses) to access the network shown in the figure, which of the following solutions can be used?
Answer: A
Explanation:
Understanding Network Security for Authorized User Access
# Problem Scenario:
Only authorized users should be allowed network access.
Users can obtain IP addresses either via DHCP or a predefined static IP list.
Unauthorized users (e.g., attackers using rogue DHCP servers or spoofed IPs) must be blocked.
# Required Technologies for Securing Access:
1##DHCP Snooping- Protects againstrogue DHCP serversand builds abinding table of legitimate DHCP clients.
2##IP Source Guard (IPSG)- Ensures that onlyauthorized IP-MAC bindingscan send traffic.
Analysis of the Answer Choices:
#A. DAI + Port Security (Incorrect)
DAI (Dynamic ARP Inspection)prevents ARP spoofingbut doesnot validate IP-MAC-DHCP bindings.
Port Securityonlylimits MAC addresses per portbut doesnot verify IP addresses.
Does NOT protect against unauthorized static IP users.
#B. DHCP Snooping + IPSG (Correct)
DHCP Snooping:
Preventsrogue DHCP servers from assigning unauthorized IPs.
Builds aDHCP binding table(IP-MAC-Port).
IP Source Guard (IPSG):
Blocks trafficfrom IPs not listed in the DHCP snooping binding table.
Can be configured to allow manually specified static IP addresses.
Best choice to allow only authorized users (both DHCP and static IP users).
#C. DHCP Snooping + DAI (Incorrect)
DAI (Dynamic ARP Inspection) prevents ARP spoofingbutdoes not block unauthorized static IP users.
Lacks IP-level access controlneeded to enforce static IP policies.
#D. DAI + IPSG (Incorrect)
IPSG (IP Source Guard) needs DHCP Snooping to build the binding table.
Without DHCP Snooping, IPSG cannot function properly.
DAI does not provide complete protection against unauthorized users.
Why is the Answer B (DHCP Snooping + IPSG)?
#Ensures only users assigned a DHCP IP (or authorized static IPs) can send traffic.
#Blocks rogue DHCP servers and unauthorized static IP users.
Real-World Application:
Enterprise Networks:Prevents unauthorizedstatic IP users or attackers from accessing VLANs.
Public Wi-Fi Security:Ensures onlyauthorized users receive IPs and can send traffic.
#Reference:Huawei HCIE-Datacom Guide - DHCP Snooping and IPSG Security Mechanisms
NEW QUESTION # 247
How long is an IPv6 prefix assigned to a host when an IPv6 address is configured for the host in SLAAC mode?
Answer: A
Explanation:
Stateless Address Autoconfiguration (SLAAC)is an IPv6 mechanism where a host automatically configures its ownglobal unicast addresswithout requiring a DHCPv6 server.
IPv6 Address Format in SLAAC:
First 64 bits#Network Prefix(received from the router's RA message).
Last 64 bits#Interface Identifier(generated using EUI-64 or a randomly assigned value).
Why is the Prefix Always 64 Bits?
SLAAC requires a/64 prefixbecause the host needsthe lower 64 bitsto generate a unique address.
IPv6 Neighbor Discovery (ND) and Address Autoconfiguration are designed for a /64 subnet mask.
Reference from Huawei HCIE-Datacom Documentation:
Huawei IPv6 Configuration Guide - SLAAC Addressing and Prefix Allocation HCIE-Datacom Training Material - IPv6 Stateless Address Autoconfiguration (SLAAC)
NEW QUESTION # 248
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