Free Cisco 350-501 Practice Exam with Questions & Answers | Set: 14

 The configuration shown is for the head-end router of a Cisco MPLS TE tunnel with segment routing. The commands included, such as “mpls traffic-eng tunnels” and “segment-routing mpls,” indicate that this is set up for a head-end router in an MPLS TE tunnel. There is no requirement for an explicit path or OSPF to be running, which eliminates options A and B. Option C is also incorrect as there’s no indication of a dynamic path configuration present.

References: The Implementing and Operating Cisco Service Provider Network Core Technologies course provides a deep dive into Service Provider technologies, including MPLS traffic engineering and segment routing, which are relevant to this configuration

The configuration creates a class map named WEB which is used to match HTTP traffic. This class map can then be referenced in a policy map to define specific actions for traffic that matches the criteria, such as applying QoS policies or traffic shaping.

References: This concept is covered in the Implementing and Operating Cisco Service Provider Network Core Technologies (SPCOR) course, where class maps and policy maps are discussed in the context of traffic classification and policy enforcement.

 MPLS LDP (Label Distribution Protocol) is used for label distribution in MPLS networks. When making changes to the LDP configuration, it’s essential to ensure that the changes do not disrupt existing LDP sessions. In this scenario, the network administrator implemented MPLS LDP changes on the PE-A LSR (Label Switching Router) device, and the goal is to prevent any disruption to LDP peers.

The MPLS LDP Non-Stop Routing (NSR) feature allows LDP sessions to survive control-plane switchover events without interruption. When NSR is enabled, the LDP session state information is synchronized between the active and standby control planes. If the active control plane fails, the standby control plane takes over seamlessly, and LDP sessions continue without interruption.

https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/msp/configuration/xe-3s/mp-ha-xe-3s-book/mp-nsr-ldp-supp.pdf

To influence inbound path selection when implementing BGP in a multihomed architecture, an engineer must configure a route map with the AS_PATH attribute. The AS_PATH attribute is used to manipulate the path information to make certain routes more or less attractive, thereby influencing the decision-making process for inbound traffic.