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| Section | Weight | Objectives |
|---|---|---|
| Network Cutover | 7% | - Rollback procedures - Migration planning techniques |
| Advanced IGP Features | 17% | - OSPF advanced capabilities - IS-IS advanced optimisations |
| Network O&M | 7% | - Operation & maintenance best practices - Monitoring and health metrics |
| MPLS Technologies | 19% | - MPLS LDP and TE - MPLS VPN basics |
| Advanced Ethernet Technologies | 10% | - VLAN and Ethernet enhancements - MAC/security features |
| Advanced BGP Features | 10% | - Route reflector and attributes - BGP policy controls |
| Troubleshooting | 10% | - Network diagnostics - Issue resolution strategies |
| IPv6 Routing | 20% | - OSPFv3/IS-IS for IPv6 - IPv6 static and dynamic routing |
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NEW QUESTION # 28
EGP authentication can prevent illegal routers from establishing neighbors with BCP routers. BCP authentication can be divided into MD5 authentication and Keychain authentication. Which of the following BGP messages will carry BCGP Keychain authentication information? ((Multiple choice)
Answer: A,B,C,D
NEW QUESTION # 29
In the IS-IS network shown in the figure, the link cost value has been marked in the figure. R1 turns on IS-IS Auto FRR, then the main path for R1 to reach 10.0.3.3/32 is R1- R2-R3, and the backup path is R1-R4-R2-R3.
Answer: A
NEW QUESTION # 30
A park deployed IPv6 for business testing. There are 4 routers (R1, 22, R3 and R4) in this network, running OSPFv3 to realize the interconnection of IPv6 network. There is a new router R5 that needs to be connected to the network for testing. An engineer introduced a direct route in the OSPFvV3 process of R4 to realize that the devices in the campus network can access the GE0/0/1 port address of R5. Which of the following descriptions of the scene are correct? (Multiple choice)
Answer: A,B,D
NEW QUESTION # 31
R1 forwards a packet with the destination IP address of 4.4.4.4 on an MPLS network .
* Some LSP (Label Switched Path) information of R3 is shown in the figure.
* During packet transmission, which of the following devices perform MPLS label operations ?
Answer: A,B,D
Explanation:
Comprehensive and Detailed In-Depth Explanation:
To determine which devices perform MPLS label operations , we need to analyze MPLS forwarding behavior based on the roles of each router in the MPLS domain .
1. Understanding MPLS Label Operations
MPLS label switching involves three main operations:
* Label Push (Ingress LSR - Label Imposition) : The ingress router (R1) assigns an MPLS label to the packet.
* Label Swap (Transit LSR - Label Forwarding) : The transit routers (R2, R3) swap the label for the next-hop router.
* Label Pop (Egress LSR - Label Disposition) : The egress router (R4) removes the MPLS label before forwarding the packet to its final destination.
2. Examining MPLS Roles of Each Router
# R1 (Ingress LSR) # Performs Label PUSH
* R1 adds an MPLS label (1025) to the IP packet and forwards it to R2.
* Operation: Push MPLS Label (Label Imposition).
* # R1 performs MPLS label operations.
# R2 (Transit LSR) # Performs Label SWAP
* R2 receives a labeled packet (1025) from R1 , swaps it with label 1026 , and forwards it to R3.
* Operation: Swap MPLS Label (Transit Label Forwarding).
* # R2 performs MPLS label operations.
# R3 (Transit LSR) # Performs Label SWAP
* R3 receives label 1026 and swaps it with label 3 , then forwards it to R4.
* Operation: Swap MPLS Label (Transit Label Forwarding).
* # R3 performs MPLS label operations.
# R4 (Egress LSR) # Does NOT Perform MPLS Operations
* R4 is the egress router and does not forward the packet further using MPLS.
* The last router removes the MPLS label (Pop) and forwards the plain IP packet .
* R4 is NOT performing MPLS label switching (swap or push), only popping the label before delivering the packet.
* # R4 does NOT perform MPLS label operations.
NEW QUESTION # 32
According to the configuration shown in the figure below, you can know that R4 has an interface advertised into IS-IS?
Answer: C
NEW QUESTION # 33
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