H12-831 Free Sample Questions

A financial services company is implementing a large-scale MPLS L3VPN network to segregate traffic for different departments. The network architect is concerned about scalability and wants to avoid a full mesh of IBGP sessions between all PE routers. The entire network is within a single Autonomous System (AS 65100). To solve this, two routers are designated as Route Reflectors (RR) in a single cluster. When a PE router (Client) learns a VPNv4 route from a CE router, what BGP attributes are added or modified by the RR before it reflects the route to other PE router clients within the same cluster?

A network administrator is configuring an IPv6 network and wants to allow hosts to automatically configure their own global unicast addresses without the use of a DHCPv6 server. Which combination of ICMPv6 messages is essential for this Stateless Address Autoconfiguration (SLAAC) process? (Select TWO)

True or False: In a standard MPLS L3VPN deployment, the Route Distinguisher (RD) is used by PE routers to control the import and export of VPNv4 routes between different VPN Routing and Forwarding (VRF) instances.

A global logistics company, GlobeHaul Inc., is transitioning its core network from IPv4-only to a dual-stack IPv4/IPv6 architecture. The project is being managed in phases to minimize disruption. The current phase involves enabling IPv6 on a segment of the network that connects two major data centers across an existing IPv4-only MPLS backbone. The edge routers at each data center (PE1 and PE2) are dual-stack capable, but the core routers (P routers) are not scheduled for an IPv6 upgrade yet. The network engineering team needs to provide end-to-end IPv6 connectivity for specific applications between the two data centers without enabling IPv6 on the core P routers. The solution must be scalable and integrate seamlessly with the existing MPLS infrastructure. The PE routers are already running MP-BGP for existing IPv4 VPN services. Which IPv6 transition technology should the engineering team implement on the PE routers to achieve this goal?

A network engineer is troubleshooting an OSPFv3 network. The command `display ospfv3 peer` on router R1 shows that the neighbor relationship with R2 is stuck in the ExStart state. What is a common reason for this issue in an OSPFv3 point-to-point link?

In an IS-IS network, what is the primary purpose of the Overload bit (OL bit) in the LSP?

A service provider uses Selective QinQ to differentiate traffic from two customers, A and B, who are connected to the same switch port, GE0/0/1. Both customers send traffic tagged with VLAN 10 and VLAN 20. The service provider wants to map Customer A's traffic (VLAN 10 and 20) to S-VLAN 100 and Customer B's traffic (VLAN 10 and 20) to S-VLAN 200. Which configuration concept on the Huawei switch achieves this?

When troubleshooting a BGP peering session, a network engineer issues the `display bgp peer` command and observes the peer state is 'Connect'. What does this state indicate about the peering process?

A network engineer is planning a network cutover to replace an old core router with a new, more powerful Huawei router. The plan must include a detailed rollback procedure. Which of the following are essential components of a robust rollback plan for this hardware migration? (Select THREE)

A consultant is designing an MPLS network and needs to configure LDP (Label Distribution Protocol) sessions between routers. Which IP address is used by default for the transport address of the LDP session on Huawei routers?