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| Section | Weight | Objectives |
|---|---|---|
| Network Cutover | 7% | - Pre-cutover verification - Post-cutover validation - Implementation and rollback strategy - Cutover planning and risk assessment |
| IPv6 Routing | 20% | - BGP4+ for IPv6 - Transition mechanisms (dual-stack, tunnel, translation) - IPv6 address planning and configuration - OSPFv3 and IS-IS for IPv6 |
| Network O&M | 7% | - Network monitoring and performance analysis - Log and alarm management - Routine maintenance procedures - Configuration management and backup |
| Network Troubleshooting | 10% | - Routing protocol fault diagnosis - Structured troubleshooting methodology - Performance and service fault resolution - Switching and link fault handling |
| Advanced IGP Features | 17% | - OSPF advanced features
|
| MPLS Technologies | 19% | - LDP and RSVP-TE protocols - MPLS OAM and protection - MPLS VPN (L3VPN, L2VPN) - MPLS fundamentals and label distribution |
| Advanced Ethernet Technologies | 10% | - VLAN aggregation and MUX VLAN - QinQ and VLAN mapping - Ethernet link aggregation and reliability - Port isolation and security features |
| Advanced BGP Features | 10% | - Routing policies and filtering - BGP multi-homing and load balancing - Route reflectors and confederations - BGP route selection and attributes |
On the OSPFv3 network shown in the figure, the LSDB of R2 contains ____ Router-LSAs. (Enter only digits.)
Correct Answer:
3
Explanation:
To determine the correct answer, we need to analyze how OSPFv3 handles Router LSAs (Type 1 LSAs) in a simple Area 0 topology like the one shown in the figure.
1. Understanding OSPFv3 Router LSAs (Type 1 LSAs)
* Router LSAs (Type 1 LSAs) are generated by each router within an OSPF area to describe its own directly connected links.
* Each router in an OSPF area generates exactly one Type 1 LSA.
* The Link-State Database (LSDB) on a router contains LSAs from all routers in the same area.
2. Analyzing the Network in the Figure
* There are 3 routers: R1, R2, and R3.
* All routers are in OSPFv3 Area 0 (which is a single area).
* Each of these routers generates one Router LSA (Type 1 LSA).
* Since R2 is in the same area as R1 and R3, its LSDB contains the Router LSAs from itself, R1, and R3.
3. Conclusion
* The LSDB of R2 contains 3 Router LSAs (one from each router: R1, R2, and R3).
* Final Answer: 3
On the IS-IS network shown in the figure, R1 imports a default route using the default-route-advertise always level-1 command. Which of the following statements are true?
Correct Answer: B,C,D 🗳️
Explanation: Only visible for TestkingPass members. You can sign-up / login (it's free).
A network engineer draws a schematic diagram of a multicast network (shown in the figure) during troubleshooting. R1 and R2 run IGMP version 2 and use PIM-SM as the multicast routing protocol. The default settings are used for other parameters. Given this, the querier on the multicast network is_____. (Enter the device ID, for example, R1.)
Correct Answer:
R1
Explanation:
IGMPv2 performs an independent querier election on a shared network segment. When multiple multicast routers initially consider themselves queriers, they exchange IGMP General Query messages and compare the source IP addresses of those messages. The multicast router with the lowest interface IP address becomes the IGMP querier.
The relevant addresses are:
* R1: 10.0.12.1/24
* R2: 10.0.12.2/24
Because 10.0.12.1 is numerically lower than 10.0.12.2, R1 is elected as the IGMP querier. R2 becomes a non- querier and stops periodically transmitting General Query messages while it continues receiving valid queries from R1.
PIM-SM does not change this result. PIM designated-router election and IGMP querier election are separate processes and may select different routers. The question specifically asks for the IGMP querier; therefore, the IGMPv2 lowest-IP rule applies. Huawei IGMPv2 working mechanism.
On the network shown in the figure, R1 and R2 have established an EBGP peer relationship through Loopback0. R1 imports the route 2001::1/128 to BGP. In Update messages sent by R1, the value of the Next Hop field in the MP_REACH_NLRI attribute is 2000::1.
Correct Answer: B 🗳️
Explanation: Only visible for TestkingPass members. You can sign-up / login (it's free).
Service routes of an enterprise are transmitted on the network. Some configurations of PE1 and PE2 are shown in the figure. Which of the following LSAs may CE2 receive?
Correct Answer: A,D 🗳️
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