Practice Free 350-501 Exam Online Questions
How does TI-LFA reduce packet loss in Segment routing?
- A . It determines which link to use when load balancing to prevent packet fragmentation loss.
- B . It establishes multiple labels per path using more than one IGP.
- C . It calculates loop-free backup paths that are rapidly implemented in case of a link failure.
- D . It enables path selection in SR-TE to support MPLS label allocation.
Refer to the exhibit.
CE1 and CE2 require connectivity to the internet through the ISP connected to PE3.
What should an engineer configure to complete this task?
- A . PE2 must be configured to serve as a route reflector for PE3 routes learned from the internet. PE2 then shares the routes with CE1 and CE2.
- B . CE1 and CE2 must be configured with a route distinguisher in the PE1 VRF that dynamically imports the route from the internet.
- C . CE1 and CE2 must be configured to use a static default route with a next-hop of PE3 to reach internet routes.
- D . PE1 must be configured with an import route target in the CE1 VRF that matches the export route target for the internet VRF on PE3.
C
Explanation:
In this scenario, CE1 and CE2 need connectivity to the internet through the ISP connected to PE3. The most straightforward approach is to configure CE1 and CE2 with a static default route pointing to PE3 as the next-hop for internet-bound traffic. This ensures that any traffic destined for the internet will be routed directly to PE3, which is directly connected to the internet. Other options (A, B, and D) involve more complex configurations and are not necessary for this specific task.
Reference: Implementing and Operating Cisco Service Provider Network Core Technologies source documents or study guide
Egress PE NAT is being used via a single centralized router to provide Internet access to L3VPN customers.
Which description of the NAT operation is true?
- A . Users m different VRFs cannot share the same outside global IP address
- B . The NAT table contains a field to identify the inside VRF of a translation
- C . Multiple address pools are needed for the same L3VPN because each site has a separate NAT
- D . The different L3VPNs using the Internet access must not have IP overlaps internally
B
Explanation:
Egress PE NAT via a single centralized router allows L3VPN customers to access the internet. The NAT operation maintains a table that includes a field to identify the inside VRF of a translation. This is crucial for distinguishing between different customer VPNs that may use overlapping IP address spaces. By having this field, the NAT process can correctly associate each internal IP with its respective VRF and outside global IP address1.
Reference: Centralized egress to internet, Egress PE NAT single centralized router.
Which OoS model allows hosts to report their QoS needs to the network?
- A . DiffServ
- B . CB-WFQ
- C . IntServ
- D . MQC
C
Explanation:
IntServ (Integrated Services) is a model that allows hosts to report their QoS (Quality of Service) needs to the network. In this model, applications inform the network about their bandwidth requirements and traffic characteristics, enabling the network to reserve resources and provide the requested QoS.
Reference: = Implementing and Operating Cisco Service Provider Network Core Technologies
Which protocol is used for communication between the PCE and PCC?
- A . ICMP
- B . PCEP
- C . CEF
- D . POP
B
Explanation:
The PCE (Path Computation Element) communicates with the PCC (Path Computation Client) using the PCEP. PCEP is responsible for path computation and signaling in MPLS networks.
Reference: Implementing and Operating Cisco Service Provider Network Core Technologies course materials.
Which two features describe TI-LFA? (Choose two.)
- A . TI-LFA uses PQ or P and Q nodes on the post-convergence path to compute the backup path.
- B . Post-convergence, TI-LFA considers the next-hop neighbor to calculate the backup repair path.
- C . TI-LFA works with point of local repair when the PQ node supports only LDP capability.
- D . Unlike RLFA, TI-LFA works without the PQ node and provides double segment failure protection.
- E . TI-LFA leverages the post-convergence path that carries data traffic after a failure.
Refer to the exhibit.
OSPF is running in the given network. R1 was previously running EIGRP on a standalone network, and a network engineer just migrated it to OSPF. The R1 peering with R2 has come up.
Which additional action must the engineer take so that R2 receives routes from Area 1 and Area 0 but is prevented from receiving routes from Area 2?
- A . Implement a route map that matches R2’s interface to R3 and R4, and then attach the route map to an inbound distribute list on R2.
- B . Implement a route map that matches the routes in an ACL from Area 2, and then attach the route map to an inbound distribute list on R2.
- C . Implement a route map that matches the routes from Area 2 in a prefix list, and then attach the route map to an outbound distribute list on R2.
- D . Implement a route map that matches R1’s next-hop address, and then attach the route map to an outbound distribute list on R2.
Refer to the exhibit.
A NOC engineer is configuring label-based forwarding from CSR to the EPC gateway. Cell-site operation and maintenance for IPv4 traffic between 10.20.10.1 and 192.168.10.10 is already up. CR1 and CR2 are configured as route reflectors for AG1 and AG2.
Which action completes the configuration?
- A . Remove address-family labeled-unicast from the BGP session-group infra on AG1 for neighbor-group core.
- B . Apply the BGP_Egress_Filter route policy to the BGP neighbor-group packet core on AG1.
- C . Configure AG1 to allocate a label to the BGP routes that are received in the BGP session group transport.
- D . Configure AG1 to allow the 300:100 and 200:100 communities in the BGP_Egress_Filter route policy.
What Is the primary role of Ansible In a network?
- A . It is used as a debugging tool for connectivity issues between the DMZ and an enterprise intranet.
- B . It Is used to diagnose Layer 11ssues In data centers that span more than one city block.
- C . It is used to deploy IPv6 configuration is networks That are dual slack.
- D . It is used as a network automation provisioning and configuration tool.
D
Explanation:
Ansible is widely recognized as a robust network automation tool that facilitates provisioning, configuration, and management of network devices. It uses simple, human-readable YAML syntax for its playbooks, making it easy to define tasks and orchestrate workflows for automated network operations1.
Refer to the exhibit.
The network is running OSPF, and access to the internet is provided through router RB. Router RA connects to several servers that provide services to users connected to RC and RF. User traffic is growing, and the engineering team wants to mitigate the future potential for congestion when the servers are experiencing heavy use.
Which action must the team take to maintain better network performance?
- A . Implement MPLS and install a Cisco MPLS TE tunnel to route high-priority traffic via a preferred path.
- B . Implement ACLs to manage traffic flowing over individual links.
- C . Implement class maps to categorize traffic and apply them to policies to manage traffic flow.
- D . Implement OSPF point-to-point links to eliminate the need for DR election and the associated traffic.