{"id":15323,"date":"2026-09-17T11:40:15","date_gmt":"2026-09-17T11:40:15","guid":{"rendered":"https:\/\/www.examlabs.com\/certification\/?p=15323"},"modified":"2026-09-17T11:40:15","modified_gmt":"2026-09-17T11:40:15","slug":"cisco-ccnp-service-provider-350-501-practice-test-questions-and-exam-dumps-part14-q261-q280","status":"publish","type":"post","link":"https:\/\/www.examlabs.com\/certification\/cisco-ccnp-service-provider-350-501-practice-test-questions-and-exam-dumps-part14-q261-q280\/","title":{"rendered":"Cisco CCNP Service Provider 350-501 Practice Test Questions and Exam Dumps Part14 Q261-Q280"},"content":{"rendered":"

<\/h1>\n

View Full <\/b>Cisco CCNP Service Provider 350-501 Exam Dumps<\/b><\/a> and Practice Test Dumps.<\/b><\/h2>\n

 <\/p>\n

Question 261<\/b><\/h3>\n

Which protocol provides a standardized mechanism for retrieving and modifying YANG-modeled configuration data over an XML-based management session?<\/b><\/p>\n

    \n
  1. NETCONF<\/span><\/li>\n
  2. IGMP<\/span><\/li>\n
  3. PIM<\/span><\/li>\n
  4. LACP<\/span><\/li>\n<\/ol>\n

    Correct Answer: 1<\/b><\/p>\n

    Explanation<\/b><\/h3>\n

    NETCONF is a network management protocol designed to retrieve, modify, and manage configuration data in a structured manner. It commonly works with YANG data models and uses XML as its primary encoding. NETCONF supports operations such as retrieving configuration, editing configuration, validating changes, and committing changes depending on the implementation. This makes it useful for automated service-provider network management. IGMP handles multicast membership, PIM handles multicast routing, and LACP provides link aggregation. Therefore, NETCONF is the correct protocol for structured YANG-based configuration management.<\/span><\/p>\n

    Question 262<\/b><\/h3>\n

    Which modeling language is commonly used to describe the structure and semantics of network configuration and operational data?<\/b><\/p>\n

      \n
    1. JSON<\/span><\/li>\n
    2. YANG<\/span><\/li>\n
    3. HTTP<\/span><\/li>\n
    4. SSH<\/span><\/li>\n<\/ol>\n

      Correct Answer: 2<\/b><\/p>\n

      Explanation<\/b><\/h3>\n

      YANG is a data-modeling language used to describe configuration, state, notifications, and operational data for network-management systems. It provides a structured representation of network resources and their relationships. Protocols such as NETCONF and RESTCONF can use YANG models to provide consistent interfaces for automation. JSON is a data encoding format, HTTP is a transport protocol used by REST-based interfaces, and SSH provides secure remote access. Therefore, YANG is the correct answer for describing the structure and semantics of network-management data.<\/span><\/p>\n

      Question 263<\/b><\/h3>\n

      Which RESTCONF method is normally used to retrieve an existing configuration or operational resource?<\/b><\/p>\n

        \n
      1. GET<\/span><\/li>\n
      2. POST<\/span><\/li>\n
      3. DELETE<\/span><\/li>\n
      4. PATCH<\/span><\/li>\n<\/ol>\n

        Correct Answer: 1<\/b><\/p>\n

        Explanation<\/b><\/h3>\n

        The HTTP GET method is commonly used with RESTCONF to retrieve resources from a network device. A management application can use GET to request configuration or operational information represented according to the relevant YANG model. POST is commonly associated with creating resources or invoking operations, DELETE removes resources, and PATCH modifies part of an existing resource. RESTCONF uses standard HTTP methods while providing access to YANG-modeled network data. Therefore, GET is the correct method for retrieving an existing resource.<\/span><\/p>\n

        Question 264<\/b><\/h3>\n

        Which HTTP method is commonly used with RESTCONF to remove an existing configuration resource?<\/b><\/p>\n

          \n
        1. PUT<\/span><\/li>\n
        2. GET<\/span><\/li>\n
        3. DELETE<\/span><\/li>\n
        4. POST<\/span><\/li>\n<\/ol>\n

          Correct Answer: 3<\/b><\/p>\n

          Explanation<\/b><\/h3>\n

          The HTTP DELETE method is used to remove a resource through RESTCONF when the operation is supported by the relevant data model and server implementation. RESTCONF maps standard HTTP methods to operations on YANG-modeled resources. GET retrieves information, POST can create resources or invoke operations, and PUT can replace or create a resource at a specified location. DELETE therefore provides the appropriate operation when a configuration resource needs to be removed. Network automation systems should still validate the intended resource and dependencies before performing destructive configuration changes.<\/span><\/p>\n

          Question 265<\/b><\/h3>\n

          What is a major advantage of idempotent network automation?<\/b><\/p>\n

            \n
          1. Repeated execution can produce the same desired state without unnecessary changes<\/span><\/li>\n
          2. It requires every device to use Telnet<\/span><\/li>\n
          3. It disables configuration validation<\/span><\/li>\n
          4. It prevents configuration backups<\/span><\/li>\n<\/ol>\n

            Correct Answer: 1<\/b><\/p>\n

            Explanation<\/b><\/h3>\n

            Idempotent automation is designed so that applying the same desired configuration repeatedly results in the same final state rather than continually making additional changes. This is especially useful in service-provider environments because automation workflows may be executed multiple times during deployment or reconciliation. Properly designed automation checks the current state and changes only what is required to reach the desired state. This reduces unnecessary configuration operations and helps make deployments more predictable. Therefore, producing the same desired state through repeated execution is the key advantage of idempotency.<\/span><\/p>\n

            Question 266<\/b><\/h3>\n

            Which system is commonly used as a centralized authoritative repository for network inventory and desired configuration information?<\/b><\/p>\n

              \n
            1. Source of truth<\/span><\/li>\n
            2. ARP table<\/span><\/li>\n
            3. MAC address table<\/span><\/li>\n
            4. DNS cache<\/span><\/li>\n<\/ol>\n

              Correct Answer: 1<\/b><\/p>\n

              Explanation<\/b><\/h3>\n

              A source-of-truth system stores authoritative information about network devices, services, addresses, topology, or intended configuration. Automation tools can consume this information to determine what should exist in the network and then compare it with actual device state. Maintaining a reliable source of truth helps prevent inconsistent manual records and enables repeatable automation workflows. ARP tables and MAC address tables contain dynamic forwarding information rather than authoritative service inventory. DNS caches store recently resolved name information. Therefore, a source-of-truth system is the correct answer.<\/span><\/p>\n

              Question 267<\/b><\/h3>\n

              Which network monitoring protocol commonly uses a manager-agent architecture to collect device counters and status information?<\/b><\/p>\n

                \n
              1. SNMP<\/span><\/li>\n
              2. SMTP<\/span><\/li>\n
              3. FTP<\/span><\/li>\n
              4. SIP<\/span><\/li>\n<\/ol>\n

                Correct Answer: 1<\/b><\/p>\n

                Explanation<\/b><\/h3>\n

                Simple Network Management Protocol (SNMP) commonly uses a manager-agent architecture. The SNMP manager can request information from agents running on network devices, while devices can also generate notifications such as traps or informs. SNMP is widely used for monitoring interface statistics, device health, environmental information, and other operational data. SMTP is used for email transport, FTP transfers files, and SIP is used for session signaling in communication systems. Therefore, SNMP is the correct protocol for traditional manager-agent network monitoring.<\/span><\/p>\n

                Question 268<\/b><\/h3>\n

                Which SNMP operation allows a monitored device to send an unsolicited notification to the management system?<\/b><\/p>\n

                  \n
                1. GET<\/span><\/li>\n
                2. SET<\/span><\/li>\n
                3. TRAP<\/span><\/li>\n
                4. WALK<\/span><\/li>\n<\/ol>\n

                  Correct Answer: 3<\/b><\/p>\n

                  Explanation<\/b><\/h3>\n

                  An SNMP TRAP is an unsolicited notification sent by an SNMP agent to a management system when a significant event occurs. Examples can include interface state changes, device failures, or other configured events. GET is used by a manager to retrieve information, while SET modifies supported management objects. SNMP WALK is commonly used as a management utility operation to retrieve a sequence of objects but is not itself an SNMP protocol message type. Therefore, TRAP is the correct answer for an unsolicited SNMP notification.<\/span><\/p>\n

                  Question 269<\/b><\/h3>\n

                  Which network-management approach continuously streams selected operational data instead of relying primarily on periodic polling?<\/b><\/p>\n

                    \n
                  1. Streaming telemetry<\/span><\/li>\n
                  2. TFTP<\/span><\/li>\n
                  3. Telnet<\/span><\/li>\n
                  4. ARP<\/span><\/li>\n<\/ol>\n

                    Correct Answer: 1<\/b><\/p>\n

                    Explanation<\/b><\/h3>\n

                    Streaming telemetry continuously sends selected operational information from network devices to a collector or monitoring platform. Instead of waiting for periodic polling requests, the device can stream updates according to configured subscriptions and reporting intervals. This can provide more timely visibility into interface utilization, routing state, system resources, and service performance. TFTP is used for file transfer, Telnet provides remote terminal access, and ARP performs IPv4 address resolution. Therefore, streaming telemetry is the correct approach for continuous operational-data delivery.<\/span><\/p>\n

                    Question 270<\/b><\/h3>\n

                    Which technology can measure packet loss, delay, and jitter between network endpoints for service-performance monitoring?<\/b><\/p>\n

                      \n
                    1. TWAMP<\/span><\/li>\n
                    2. LACP<\/span><\/li>\n
                    3. RADIUS<\/span><\/li>\n
                    4. DHCP<\/span><\/li>\n<\/ol>\n

                      Correct Answer: 1<\/b><\/p>\n

                      Explanation<\/b><\/h3>\n

                      Two-Way Active Measurement Protocol (TWAMP) is designed to measure network performance characteristics such as round-trip delay, packet loss, and jitter. It uses active test traffic between measurement endpoints and can provide useful information about the performance of IP networks. Service providers can use such measurements to monitor service-level objectives and identify degradation across transport paths. LACP manages link aggregation, RADIUS provides AAA services, and DHCP provides address configuration. Therefore, TWAMP is the correct technology for active performance measurement.<\/span><\/p>\n

                      Question 271<\/b><\/h3>\n

                      Which Ethernet OAM standard is commonly associated with Connectivity Fault Management?<\/b><\/p>\n

                        \n
                      1. IEEE 802.1ag<\/span><\/li>\n
                      2. IEEE 802.11ax<\/span><\/li>\n
                      3. IEEE 802.3ad<\/span><\/li>\n
                      4. IEEE 802.1X<\/span><\/li>\n<\/ol>\n

                        Correct Answer: 1<\/b><\/p>\n

                        Explanation<\/b><\/h3>\n

                        IEEE 802.1ag is associated with Connectivity Fault Management (CFM), an Ethernet OAM technology used to monitor connectivity and detect faults within Ethernet service networks. CFM provides mechanisms such as Continuity Check Messages and other maintenance-domain functions that help operators identify service-level connectivity problems. IEEE 802.11ax relates to Wi-Fi, IEEE 802.3ad is associated with link aggregation, and IEEE 802.1X provides port-based network access control. Therefore, IEEE 802.1ag is the correct standard for Ethernet Connectivity Fault Management.<\/span><\/p>\n

                        Question 272<\/b><\/h3>\n

                        Which Ethernet OAM mechanism is specifically designed to measure performance characteristics such as frame delay and frame loss?<\/b><\/p>\n

                          \n
                        1. Y.1731<\/span><\/li>\n
                        2. LDP<\/span><\/li>\n
                        3. OSPF<\/span><\/li>\n
                        4. RPKI<\/span><\/li>\n<\/ol>\n

                          Correct Answer: 1<\/b><\/p>\n

                          Explanation<\/b><\/h3>\n

                          ITU-T Y.1731 provides Ethernet OAM performance-monitoring mechanisms. It can be used to measure characteristics such as frame delay, frame delay variation, and frame loss in Ethernet service environments. These measurements help service providers evaluate whether an Ethernet service is meeting defined performance objectives. LDP is used for MPLS label distribution, OSPF is an IGP, and RPKI validates BGP route-origin information. Therefore, Y.1731 is the appropriate standard for Ethernet service performance measurement.<\/span><\/p>\n

                          Question 273<\/b><\/h3>\n

                          Which Ethernet service technology allows multiple customer VLANs to be transported across a provider network using an additional VLAN tag?<\/b><\/p>\n

                            \n
                          1. QinQ<\/span><\/li>\n
                          2. PIM<\/span><\/li>\n
                          3. BFD<\/span><\/li>\n
                          4. RPKI<\/span><\/li>\n<\/ol>\n

                            Correct Answer: 1<\/b><\/p>\n

                            Explanation<\/b><\/h3>\n

                            QinQ, also known as VLAN stacking, allows an additional VLAN tag to be added to an Ethernet frame. This enables a provider to preserve customer VLAN information while using an outer provider VLAN tag for transport across the service-provider network. QinQ can therefore support multiple customers that use overlapping VLAN IDs and helps separate customer traffic within the provider infrastructure. PIM provides multicast routing, BFD provides rapid failure detection, and RPKI validates BGP route origins. Therefore, QinQ is the correct Ethernet service technology.<\/span><\/p>\n

                            Question 274<\/b><\/h3>\n

                            What is the primary purpose of an Ethernet pseudowire in a service provider network?<\/b><\/p>\n

                              \n
                            1. Emulate a Layer 2 connection across a packet-switched network<\/span><\/li>\n
                            2. Synchronize NTP clocks<\/span><\/li>\n
                            3. Allocate IPv6 addresses<\/span><\/li>\n
                            4. Perform BGP route validation<\/span><\/li>\n<\/ol>\n

                              Correct Answer: 1<\/b><\/p>\n

                              Explanation<\/b><\/h3>\n

                              An Ethernet pseudowire emulates a Layer 2 service across a packet-switched provider network. It can transport Ethernet frames between customer endpoints even though the underlying provider infrastructure may use MPLS or another packet transport technology. Pseudowires are commonly used in services such as VPWS and other Layer 2 VPN architectures. The provider network handles the transport while the pseudowire presents a logical point-to-point Layer 2 connection. NTP handles time synchronization, IPv6 address allocation is a separate function, and BGP route validation can use RPKI. Therefore, Layer 2 emulation is correct.<\/span><\/p>\n

                              Question 275<\/b><\/h3>\n

                              Which Layer 2 VPN service provides a point-to-point Ethernet connection between two customer endpoints?<\/b><\/p>\n

                                \n
                              1. VPWS<\/span><\/li>\n
                              2. VPLS<\/span><\/li>\n
                              3. Anycast-RP<\/span><\/li>\n
                              4. MVPN<\/span><\/li>\n<\/ol>\n

                                Correct Answer: 1<\/b><\/p>\n

                                Explanation<\/b><\/h3>\n

                                Virtual Private Wire Service (VPWS) provides a point-to-point Layer 2 VPN service. It creates a logical Ethernet connection between two customer attachment points across the provider network. The provider infrastructure transports customer frames without requiring the customer endpoints to share the same physical network. VPLS, in contrast, provides multipoint Layer 2 connectivity between multiple customer sites. Anycast-RP is related to multicast Rendezvous Point redundancy, while MVPN provides multicast VPN services. Therefore, VPWS is the correct service for a point-to-point Ethernet connection.<\/span><\/p>\n

                                Question 276<\/b><\/h3>\n

                                Which Layer 2 VPN technology provides multipoint Ethernet connectivity between several customer sites?<\/b><\/p>\n

                                  \n
                                1. VPWS<\/span><\/li>\n
                                2. VPLS<\/span><\/li>\n
                                3. BFD<\/span><\/li>\n
                                4. RADIUS<\/span><\/li>\n<\/ol>\n

                                  Correct Answer: 2<\/b><\/p>\n

                                  Explanation<\/b><\/h3>\n

                                  Virtual Private LAN Service (VPLS) provides multipoint Layer 2 connectivity between multiple customer sites across a provider network. It creates a virtual Ethernet switching environment where customer sites can communicate as though they were connected to the same logical Layer 2 network. VPLS uses provider-network mechanisms to transport Ethernet frames between participating sites. VPWS provides point-to-point connectivity instead, while BFD detects failures and RADIUS provides AAA services. Therefore, VPLS is the correct technology for multipoint Ethernet VPN connectivity.<\/span><\/p>\n

                                  Question 277<\/b><\/h3>\n

                                  Which protocol is commonly used to negotiate and maintain an aggregated bundle of multiple Ethernet links?<\/b><\/p>\n

                                    \n
                                  1. LACP<\/span><\/li>\n
                                  2. IGMP<\/span><\/li>\n
                                  3. MSDP<\/span><\/li>\n
                                  4. NETCONF<\/span><\/li>\n<\/ol>\n

                                    Correct Answer: 1<\/b><\/p>\n

                                    Explanation<\/b><\/h3>\n

                                    Link Aggregation Control Protocol (LACP) is used to dynamically negotiate and maintain a link aggregation group consisting of multiple physical Ethernet links. Aggregating links can increase available bandwidth and provide redundancy if an individual member link fails. LACP exchanges control information between devices to determine which links can participate in the aggregation group. IGMP manages multicast group membership, MSDP exchanges multicast source information, and NETCONF provides network configuration management. Therefore, LACP is the correct protocol for negotiating Ethernet link aggregation.<\/span><\/p>\n

                                    Question 278<\/b><\/h3>\n

                                    Which mechanism can help detect a unidirectional failure on an Ethernet link where one side can transmit but cannot properly receive traffic?<\/b><\/p>\n

                                      \n
                                    1. UDLD<\/span><\/li>\n
                                    2. DHCP<\/span><\/li>\n
                                    3. RPKI<\/span><\/li>\n
                                    4. SNMP SET<\/span><\/li>\n<\/ol>\n

                                      Correct Answer: 1<\/b><\/p>\n

                                      Explanation<\/b><\/h3>\n

                                      Unidirectional Link Detection (UDLD) is designed to detect situations where traffic is flowing in only one direction across an Ethernet link. A unidirectional failure can cause forwarding problems and, in some Layer 2 topologies, potentially contribute to loops or incorrect forwarding behavior. UDLD exchanges information between neighboring devices to verify bidirectional communication. DHCP provides address configuration, RPKI validates BGP route origins, and SNMP SET modifies management objects. Therefore, UDLD is the correct mechanism for detecting unidirectional Ethernet failures.<\/span><\/p>\n

                                      Question 279<\/b><\/h3>\n

                                      Which protocol can synchronize clocks across network devices with higher precision than traditional NTP in suitable environments?<\/b><\/p>\n

                                        \n
                                      1. PTP<\/span><\/li>\n
                                      2. FTP<\/span><\/li>\n
                                      3. LDP<\/span><\/li>\n
                                      4. VRRP<\/span><\/li>\n<\/ol>\n

                                        Correct Answer: 1<\/b><\/p>\n

                                        Explanation<\/b><\/h3>\n

                                        Precision Time Protocol (PTP), standardized under IEEE 1588, can provide highly precise clock synchronization across network devices when supported by suitable hardware and network designs. PTP is commonly used in environments where accurate timing is important, including telecommunications and service-provider networks. NTP also provides time synchronization but is generally designed for less demanding precision requirements. FTP transfers files, LDP distributes MPLS labels, and VRRP provides first-hop gateway redundancy. Therefore, PTP is the correct protocol for high-precision clock synchronization.<\/span><\/p>\n

                                        Question 280<\/b><\/h3>\n

                                        Which first-hop redundancy protocol allows multiple routers to share a virtual IP address and provides gateway redundancy for hosts?<\/b><\/p>\n

                                          \n
                                        1. VRRP<\/span><\/li>\n
                                        2. LDP<\/span><\/li>\n
                                        3. IS-IS<\/span><\/li>\n
                                        4. NETCONF<\/span><\/li>\n<\/ol>\n

                                          Correct Answer: 1<\/b><\/p>\n

                                          Explanation<\/b><\/h3>\n

                                          Virtual Router Redundancy Protocol (VRRP) allows multiple routers to participate in a virtual router group and share a virtual IP address. Hosts can use this virtual address as their default gateway, while the participating routers provide redundancy if the active forwarding router becomes unavailable. VRRP therefore helps maintain gateway availability without requiring hosts to change their configured default gateway. LDP distributes MPLS labels, IS-IS is a link-state routing protocol, and NETCONF is used for network configuration management. Therefore, VRRP is the correct first-hop redundancy protocol.<\/span><\/p>\n

                                           <\/p>\n","protected":false},"excerpt":{"rendered":"

                                          View Full Cisco CCNP Service Provider 350-501 Exam Dumps and Practice Test Dumps.   Question 261 Which protocol provides a standardized mechanism for retrieving and modifying YANG-modeled configuration data over an XML-based management session? NETCONF IGMP PIM LACP Correct Answer: 1 Explanation NETCONF is a network management protocol designed to retrieve, modify, and manage configuration […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[1648,1647],"tags":[],"_links":{"self":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/15323"}],"collection":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/comments?post=15323"}],"version-history":[{"count":1,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/15323\/revisions"}],"predecessor-version":[{"id":15337,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/posts\/15323\/revisions\/15337"}],"wp:attachment":[{"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/media?parent=15323"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/categories?post=15323"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.examlabs.com\/certification\/wp-json\/wp\/v2\/tags?post=15323"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}