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| Section | Weight | Objectives |
|---|---|---|
| Advanced Routing and Switching Technologies | 37% | - Advanced Routing Protocols
|
| Network Automation Technologies and Practice | 17% | - Automation Foundation
|
| Campus Network Planning and Deployment | 23% | - Campus Network Architecture Design
|
| WAN Interconnection Network Planning and Deployment | 8% | - WAN Interconnection Technologies
|
| Bearer WAN Planning and Deployment | 15% | - High-level Technology Deployment
|
>> H12-891_V1.0 Latest Dumps Sheet <<
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NEW QUESTION # 113
Which of the following statements is incorrect about intranet security design for a large or medium-sized virtualized campus network?
Answer: B
Explanation:
Option A: Correct - both terminal and interface security are important.
Option C: Correct -CAPWAP supports DTLSencryption for secure tunnel communication.
Option D: Correct - intranet security design considersboth wired and wireless.
Option B:Incorrect- traffic suppression (such as broadcast suppression) is implemented usingrate limiting or storm control,not by shutting down interfaces. Shutting down interfaces would disrupt legitimate traffic too.
Correct answer: B
NEW QUESTION # 114
When deploying BGP/MPLS IPVPN, OSPF's VPN route tag is not present
The extended properties of MP-BGP are passed only locally, only locally, and only meaningful on routers that receive MP-BGP routes and generate OSPF LSAs.
Answer: A
NEW QUESTION # 115
On the campus network shown, IPv6 is deployed for service tests. Four routers are deployed on the network, and OSPFv3 is used for IPv6 network connectivity. An engineer checks the LSDB of R2 and obtains a Link- LSA. Which of the following statements about the LSA are correct?
Answer: A,C,D
Explanation:
InOSPFv3,Link-LSA (Type 8)is generated by a routerfor each of its interfacesto advertise:
Therouter's link-local addresson that interface.
TheIPv6 prefixesassociated with the interface.
Flags and options, such as router priority or loopback indicators.
From the output:
Link-LSA (Interface GigabitEthernet0/0/0)
Originating Router: 10.1.2.2
Link-Local Address: FE80::2E0:FCFF:FECD:4F79
Prefix: 2001:DB8:2345:23::/64
A: The link-local address of R2's GE0/0/0 is FE80::2E0:FCFF:FECD:4F79# This matches the Link-Local Address field in the LSA.# B: The IPv6 address prefix of R2's GE0/0/0 is 2001:DB8:2345:23::/64# This matches the Prefix field in the LSA.# C: This LSA indicates that R2 does not support external routes but can participate in IPv6 route calculation##Incorrect.
TheLink-LSAdoesnot provide any indicationabout external route capabilities.
It simply advertisesinterface-specific IPv6 and link-local info.
Whether R2 supports external routes depends onType 5 (External) or Type 7 (NSSA) LSAs, not Link-LSAs.
D: This LSA is generated by R2# The Originating Router: 10.1.2.2 is R2's router ID, so this LSA is definitely generated by R2.# Correct Answers:A, B, D The Link-LSA in OSPFv3 contains:
The link-local address used by the originating router on the link.
A list of all IPv6 prefixes associated with the link.
Flags such as router priority and the Router-LSA options.
These LSAs are alwaysgenerated by the router itselfand arenot flooded beyond the link.
NEW QUESTION # 116
The figure shows a packet that contains three label headers. Select the values (in decimal notation) of the X, Y, and Z fields, respectively.
Answer:
Explanation:
Explanation:
X = 0
Y = 0
Z = 1
Understanding MPLS Label Headers
#What is MPLS (Multiprotocol Label Switching)?
MPLS is ahigh-performance forwarding technologythat replacesIP lookups with label switching.
Packets are forwardedbased on labels instead of destination IP addresses.
MPLS labels are stacked when passing throughmultiple hops.
#MPLS Label Stack Structure
Each MPLS label hasfour fields:
Label- 20-bit identifier used for forwarding.
EXP (Experimental Bits / Traffic Class)- 3-bit field used forQoS (Quality of Service).
S (Bottom of Stack)- 1-bit flag that indicates whether this is thelast (bottom) label in the stack.
TTL (Time-To-Live)- 8-bit field to prevent loops.
Understanding the EXP Fields (X, Y, Z) in the Figure
The image shows a packet with three MPLS labels.
Each label has anEXP field (X, Y, Z) representing the QoS bits.
By default,MPLS EXP bits are copied from the top label to lower labels unless modified by QoS policies.
If no QoS policy modifies the EXP bits, they remain thedefault value of 0.
Thebottom label in the stack (Label 3) often has an EXP value of 1 to indicate specific QoS policies.
Why Are the Answers X = 0, Y = 0, Z = 1?
#X = 0 (Default EXP for Label 1, the top label in the stack).
#Y = 0 (EXP for Label 2, unchanged from the default value).
#Z = 1 (EXP for Label 3, indicating a QoS setting applied to the bottom label).
Real-World Application:
MPLS QoS (Quality of Service):EXP values determinepacket priorityinService Provider networks.
Traffic Engineering (TE):MPLS labels guide packets throughoptimized paths, ensuringlow-latency services.
Enterprise WAN Optimization:MPLS traffic is prioritized forcritical applications like VoIP, Video Conferencing, and Cloud Services.
#Reference:Huawei HCIE-Datacom Guide - MPLS Label Stack and QoS EXP Field Processing
NEW QUESTION # 117
Which of the following tools cannot be referenced directly by the If-match clause in Route-policy?
Answer: B
NEW QUESTION # 118
......
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