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| Section | Weight | Objectives |
|---|---|---|
| Bearer WAN Planning and Deployment | 15% | - Traffic Engineering
|
| Campus Network Planning and Deployment | 23% | - Underlay Network
|
| Advanced Routing and Switching Technology | 37% | - IS-IS
|
| WAN Interconnection Network Planning and Deployment | 8% | - SD-WAN
|
| Network Automation | 17% | - iMaster NCE
|
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NEW QUESTION # 128
The following description of the Lsp shard extension for ISIS is correct?
Answer: D
NEW QUESTION # 129
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: B
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 # 130
In a scenario where a VXLAN tunnel is dynamically established through BGP EVPN, which of the following fields is not carried in BGP EVPN Type 2 routes?
Answer: C
Explanation:
BGP EVPN Route Types in VXLAN:
* BGP EVPN Type 2 Route (MAC/IP Advertisement Route)
* Used for host reachability advertisement.
* Carries MAC and IP address information of endpoints.
* Does not carry an IP Prefix field (Type 5 routes handle prefixes).
* Correct Explanation of Answer Choices:# IP Address (B) is included - Used for host mobility and reachability.# L3VNI (C) is included - Used for Layer 3 VXLAN routing.# L2VNI (D) is included - Used for Layer 2 VXLAN bridging.# IP Prefix (A) is not included in Type 2 routes - It is part of EVPN Type 5 routes for prefix advertisement.
Reference from Huawei HCIE-Datacom Documentation:
* Huawei VXLAN BGP EVPN Configuration Guide - Type 2 vs. Type 5 Routes
* HCIE-Datacom Training Material - VXLAN Overlay Networks and BGP EVPN
NEW QUESTION # 131
What does IPV6 enable topology ipv6 mean under IS-IS protocol view?
Answer: B
NEW QUESTION # 132
In an IPv6 network, two nodes A and B are neighbors to each other if node A sends to node B NS message, if Node B receives the message and then replies to the NA message, then on Node A On the view, the neighbor status will be marked as What?
Answer: A
NEW QUESTION # 133
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