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| Section | Objectives |
|---|---|
| Topic 1: Network Automation and Programmability | - SDN and automation
|
| Topic 2: Data Center and Virtualization Technologies | - VXLAN and overlay networks
|
| Topic 3: Enterprise Network Architecture | - Network design principles
|
| Topic 4: Network Security and QoS | - QoS mechanisms
|
| Topic 5: IPv6 and Advanced IP Technologies | - IPv6 deployment
|
| Topic 6: WAN and VPN Technologies | - MPLS fundamentals
|
| Topic 7: Routing and Switching Technologies | - Switching technologies
|
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NEW QUESTION # 232
What are the following statements about 8021x, RADIUS, and HWTACACS certification? ( Multiple choice questions).
Answer: A,C
NEW QUESTION # 233
Regarding the Stub region and the NSSA region of the OSPF protocol , the following statement is incorrect with a single choice
Answer: A
NEW QUESTION # 234
The naming of SRv6 instructions complies with certain rules. You can quickly determine the function of an instruction based on the instruction name. Which of the following statements about the keywords in SRv6 instruction names are correct?
Answer: B,C,D
Explanation:
SRv6 Instruction Naming Conventions
SRv6 (Segment Routing over IPv6) uses segment identifiers (SIDs) with specific functions, indicated by instruction keywords:
✅ A. T: Searches a specified routing table to forward packets.
T (Table Lookup) → Performs a lookup in a specified routing table and forwards packets accordingly.
❌ B. M: Searches a Layer 2 forwarding table for unicast forwarding.
Incorrect! SRv6 does not use M for Layer 2 unicast forwarding.
✅ C. V: Searches a VPN instance routing table to forward packets.
V (VPN Routing Table Lookup) → Performs a lookup in a VPN instance (VRF) table for forwarding.
✅ D. X: Forwards packets through one or a group of specified Layer 3 interfaces.
X (Cross-connect forwarding) → Forwards packets via a specified Layer 3 interface or group of interfaces.
Reference from Huawei HCIE-Datacom Documentation:
Huawei SRv6 Configuration Guide - SRv6 SID Naming and Instruction Set
HCIE-Datacom Study Material - Segment Routing over IPv6 (SRv6) Functionality
NEW QUESTION # 235
The following figure shows theinter-AS MPLS VPN Option Bsolution. IfASBR-PE1andASBR-PE2only transmit VPNv4 routes, you can run the following command onASBR-PE1:
[ASBR-PE1-bgp-af-vpnv4] undo peer 10.0.34.4 enable
Answer: A
Explanation:
Comprehensive and Detailed In-Depth Explanation:
In theinter-AS MPLS VPN Option Bsolution:
Option Bestablishes amulti-hop eBGPconnection between the ASBRs (ASBR-PE1 and ASBR-PE2) to exchangeVPNv4 routes.
In this setup, theASBRs exchange labeled VPNv4 routesviaMP-BGP(Multiprotocol BGP).
The command:
[ASBR-PE1-bgp-af-vpnv4] undo peer 10.0.34.4 enable
is used todisable VPNv4 route exchangebetween theASBR-PE1andASBR-PE2.
If this command is executed,ASBR-PE1willnot transmit VPNv4 routestoASBR-PE2, breaking theinter-AS VPN connectivity.
Therefore, the statement isFALSEbecauseASBR-PE1andASBR-PE2mustexchange VPNv4 routes to maintain connectivity between the VPN sites across different ASes.
NEW QUESTION # 236
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.)
Answer:
Explanation:
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
NEW QUESTION # 237
......
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