CISCO 350-501 Implementing and Operating Cisco Service Provider Network Core Technologies Free Practice Test — 30 Questions

Question 1

In a service provider network, a network engineer is tasked with implementing Quality of Service (QoS) to ensure that voice traffic is prioritized over video and data traffic. The engineer decides to use a Differentiated Services Code Point (DSCP) marking scheme. If the voice traffic is marked with a DSCP value of 46, video traffic with a DSCP value of 34, and data traffic with a DSCP value of 0, how should the engineer configure the queuing mechanism to ensure that voice packets are transmitted with the highest priority? Additionally, what considerations should be taken into account regarding bandwidth allocation and potential congestion scenarios?

Accepted Answer

Implement a priority queue for voice traffic, a class-based queue for video traffic, and a best-effort queue for data traffic, ensuring that voice traffic is allocated a guaranteed bandwidth of at least 30% of the total available bandwidth.

Question 2

In a service provider network, a recent security assessment revealed multiple vulnerabilities in the routing protocols being used. The assessment team recommends implementing a combination of threat mitigation techniques to enhance the security posture of the network. Which of the following strategies would be the most effective in preventing unauthorized access and ensuring the integrity of routing updates?

Accepted Answer

Implementing Route Authentication using MD5 hashing for routing protocol messages

Question 3

In a service provider network utilizing MPLS Traffic Engineering (TE), a network engineer is tasked with optimizing the bandwidth utilization across multiple paths. The engineer has identified that the total available bandwidth on the primary link is 1 Gbps, and the current traffic load is 600 Mbps. The engineer decides to implement MPLS TE to reroute some of the traffic to a secondary link that has a capacity of 800 Mbps. If the engineer reroutes 200 Mbps of traffic to the secondary link, what will be the new traffic distribution across both links, and how does this impact the overall network efficiency?

Accepted Answer

Primary link: 400 Mbps, Secondary link: 200 Mbps

Question 4

In a service provider network, a network engineer is tasked with implementing Quality of Service (QoS) to ensure that voice traffic is prioritized over video traffic. The engineer decides to use Differentiated Services Code Point (DSCP) values to classify and mark packets. Given that voice traffic is assigned a DSCP value of 46 (EF - Expedited Forwarding) and video traffic is assigned a DSCP value of 34 (AF41 - Assured Forwarding), what would be the expected behavior of the network when both types of traffic are competing for bandwidth on a congested link?

Accepted Answer

Voice traffic will be prioritized and experience lower latency compared to video traffic.

Question 5

In a service provider network, a network engineer is tasked with designing a core network that optimally handles both data and voice traffic. The engineer decides to implement a Multi-Protocol Label Switching (MPLS) architecture to enhance the efficiency of the network. Given the requirements for Quality of Service (QoS) and traffic engineering, which of the following configurations would best support the need for differentiated services while ensuring minimal latency and maximum throughput?

Accepted Answer

Implementing MPLS with Traffic Engineering (TE) and Class-Based Weighted Fair Queuing (CBWFQ) to prioritize voice packets over data packets.

Question 6

In a service provider network, a company is considering implementing automation to enhance its operational efficiency. They aim to reduce the time spent on routine tasks, minimize human error, and improve service delivery. Given these objectives, which of the following benefits of automation would most significantly impact their operational performance in terms of scalability and consistency?

Accepted Answer

Enhanced consistency in service delivery through standardized processes

Question 7

In a service provider network, you are tasked with configuring OSPF and EIGRP for optimal routing performance. The network consists of multiple areas in OSPF, and you need to ensure that EIGRP is properly integrated with OSPF to maintain efficient routing. Given that OSPF uses a link-state routing protocol and EIGRP is a hybrid protocol, what is the most effective method to ensure that both protocols can coexist and share routing information without causing routing loops or inconsistencies?

Accepted Answer

Implement route redistribution between OSPF and EIGRP with proper filtering and metrics adjustment.

Question 8

In a service provider network, a critical incident has occurred that has caused a significant outage affecting multiple customers. The network operations center (NOC) has identified the issue as a hardware failure in a core router. According to the escalation procedures, the NOC must determine the appropriate resolution strategy. Given the severity of the incident, which of the following steps should be prioritized to ensure a swift resolution while adhering to best practices in incident management?

Accepted Answer

Initiate a conference call with the relevant technical teams and stakeholders to assess the situation and develop a coordinated response plan.

Question 9

A service provider is experiencing a Distributed Denial of Service (DDoS) attack that is overwhelming its network resources. The attack is characterized by a high volume of traffic directed at a specific web server, causing legitimate users to experience significant delays or inability to access the service. The network engineer is tasked with implementing a DDoS protection strategy that not only mitigates the current attack but also prevents future occurrences. Which approach should the engineer prioritize to effectively manage the DDoS threat while ensuring minimal disruption to legitimate traffic?

Accepted Answer

Implementing rate limiting on the affected server to control the maximum number of requests per second from a single IP address.

Question 10

A network engineer is troubleshooting a service outage in a large service provider network. The engineer uses a combination of tools including ping, traceroute, and SNMP to identify the root cause of the issue. After running a traceroute to a critical server, the engineer notices that the packets are being dropped at a specific hop. What is the most effective next step for the engineer to take in order to further diagnose the issue at this hop?

Accepted Answer

Use SNMP to query the device at the problematic hop for interface statistics and error counts.

Question 11

In a service provider network, you are tasked with implementing a Quality of Service (QoS) policy to ensure that voice traffic is prioritized over video streaming during peak hours. The network has a total bandwidth of 1 Gbps, and you need to allocate bandwidth for voice traffic at a minimum of 256 Kbps per call. If you expect to handle a maximum of 100 concurrent voice calls, what is the minimum bandwidth that should be reserved for voice traffic, and how would you configure the remaining bandwidth for video streaming while ensuring that the overall QoS policy is maintained?

Accepted Answer

Reserve 25.6 Mbps for voice traffic and allocate the remaining bandwidth for video streaming.

Question 12

In a Network Operations Center (NOC), a team is tasked with monitoring the performance of a service provider\'s network. They notice that the average latency for a critical application has increased from 50 ms to 150 ms over the past week. The NOC team decides to analyze the potential causes of this latency increase. Which of the following actions should the NOC team prioritize to effectively diagnose and mitigate the issue?

Accepted Answer

Conduct a thorough analysis of network traffic patterns and identify any anomalies or congestion points.

Question 13

In a service provider network, a network engineer is tasked with optimizing the routing performance between multiple sites using OSPF (Open Shortest Path First). The engineer discovers that the OSPF area design is suboptimal, leading to excessive routing updates and increased convergence times. To address this, the engineer decides to implement a hierarchical OSPF design by segmenting the network into multiple areas. What is the primary benefit of this approach in terms of routing efficiency and network stability?

Accepted Answer

It reduces the size of the OSPF routing table and limits the scope of routing updates.

Question 14

In a service provider network that is transitioning from IPv4 to IPv6, a network engineer is tasked with implementing dual-stack and tunneling techniques to ensure seamless connectivity for both protocols. The engineer decides to use 6to4 tunneling to connect remote sites that only support IPv4. Given that the IPv4 address of the remote site is 192.0.2.1, what would be the corresponding 6to4 IPv6 address for this site, and how does this address facilitate the tunneling process?

Accepted Answer

2002:c000:0201::1

Question 15

In a service provider network, a company is experiencing a series of DDoS attacks that are overwhelming their bandwidth and affecting service availability. The network engineer is tasked with implementing a mitigation strategy that not only addresses the immediate threat but also enhances the overall resilience of the network against future attacks. Which of the following techniques would be the most effective in this scenario?

Accepted Answer

Implementing rate limiting on ingress traffic to control the amount of traffic entering the network.

Question 16

In a smart city deployment, a network engineer is tasked with integrating IoT devices that utilize various communication protocols, including LoRaWAN, NB-IoT, and Zigbee. The engineer needs to ensure that the network can handle a projected increase in device connections, estimated to grow from 10,000 to 50,000 devices over the next five years. Given that each device generates an average of 100 bytes of data per hour, calculate the total data generated by all devices in a day at the peak capacity. Additionally, which of the following strategies would best optimize the network for this increase in IoT devices while maintaining low latency and high reliability?

Accepted Answer

Implementing a multi-tier architecture with edge computing capabilities to process data closer to the source.

Question 17

In a service provider network, a network engineer is tasked with implementing route protection techniques to ensure the stability and reliability of the routing infrastructure. The engineer decides to utilize a combination of route filtering and route dampening. Given a scenario where a specific route has been flapping (going up and down) frequently, which technique would be most effective in mitigating the impact of this instability on the overall routing table? Additionally, consider the implications of each technique on the convergence time and resource utilization of the routers involved.

Accepted Answer

Implementing route dampening to suppress the unstable route temporarily.

Question 18

In a service provider network, a router is configured to implement traffic shaping on a specific interface to manage bandwidth for a critical application. The application requires a guaranteed bandwidth of 5 Mbps, but the peak traffic can reach up to 15 Mbps. The service provider decides to configure a token bucket with a committed information rate (CIR) of 5 Mbps and a burst size of 10 Mbps. If the router receives a burst of 12 Mbps for 10 seconds, how much traffic will be shaped, and what will be the effective throughput for the application during this period?

Accepted Answer

5 Mbps

Question 19

In a service provider network, a network engineer is tasked with monitoring the performance of a newly deployed MPLS (Multiprotocol Label Switching) backbone. The engineer needs to ensure that the network meets the Service Level Agreements (SLAs) for latency, jitter, and packet loss. If the SLA specifies a maximum latency of 50 ms, a maximum jitter of 10 ms, and a maximum packet loss of 0.1%, how should the engineer utilize SNMP (Simple Network Management Protocol) to effectively monitor these parameters? Which of the following strategies would best ensure compliance with the SLAs while providing actionable insights for network optimization?

Accepted Answer

Configure SNMP traps to alert on threshold breaches for latency, jitter, and packet loss, and implement regular polling intervals to gather performance data.

Question 20

In a service provider environment, you are tasked with configuring VPN Routing and Forwarding (VRF) instances to segregate customer traffic while ensuring that the routing information remains isolated. You have two customers, Customer A and Customer B, each requiring their own VRF instance. Customer A\'s network uses the IP address range 192.168.1.0/24, while Customer B uses 192.168.2.0/24. You need to configure the VRF instances and ensure that both customers can communicate with their respective gateways but not with each other. If the VRF instances are named VRF_A and VRF_B, what is the correct configuration command to create these VRF instances and associate them with their respective interfaces?

Accepted Answer

`ip vrf VRF_A; ip vrf VRF_B; interface GigabitEthernet0/0.1; ip address 192.168.1.1 255.255.255.0; ip vrf forwarding VRF_A; interface GigabitEthernet0/0.2; ip address 192.168.2.1 255.255.255.0; ip vrf forwarding VRF_B;`

Question 21

In a service provider network, a security analyst is tasked with implementing a multi-layered security approach to protect against various types of cyber threats. The analyst decides to utilize a combination of firewalls, intrusion detection systems (IDS), and encryption protocols. Which of the following strategies best exemplifies the principle of defense in depth, ensuring that if one layer fails, additional layers will still provide protection?

Accepted Answer

Deploying a next-generation firewall at the network perimeter, configuring an IDS to monitor internal traffic, and implementing end-to-end encryption for sensitive data in transit.

Question 22

In a service provider network, a company is implementing a segmentation strategy to enhance security and performance. They decide to use VLANs to isolate different departments within their organization. Each department has specific bandwidth requirements and security policies. If the marketing department requires 100 Mbps, the sales department requires 200 Mbps, and the engineering department requires 300 Mbps, how should the network engineer configure the VLANs to ensure that each department\'s traffic is isolated while also adhering to the overall bandwidth limitations of the network, which can handle a maximum of 600 Mbps?

Accepted Answer

Create three separate VLANs for each department, ensuring that the total bandwidth allocated does not exceed 600 Mbps.

Question 23

In a service provider network, a network engineer is tasked with configuring IPv6 addressing for a new segment that will support a large number of devices. The engineer decides to use a /64 subnet for the segment. If the network segment is assigned the global unicast address prefix of 2001:0db8:abcd:0012::/64, how many individual IPv6 addresses can be assigned within this subnet, and what is the significance of using a /64 subnet in this context?

Accepted Answer

18,446,744,073,709,551,616 addresses; it allows for efficient address allocation and is the recommended size for most subnets.

Question 24

In an MPLS network, a service provider is implementing Quality of Service (QoS) to manage traffic flows effectively. The provider has classified traffic into three classes: High Priority (HP), Medium Priority (MP), and Low Priority (LP). The bandwidth allocation for these classes is set as follows: HP receives 50% of the total bandwidth, MP receives 30%, and LP receives 20%. If the total available bandwidth is 1 Gbps, calculate the bandwidth allocated to each class and determine the impact of a sudden increase in HP traffic that requires an additional 100 Mbps. How should the service provider adjust the QoS policy to maintain the intended bandwidth distribution?

Accepted Answer

Reduce the bandwidth for MP and LP classes proportionally to accommodate the increased HP traffic.

Question 25

In a multi-site data center environment, a network engineer is tasked with designing a Data Center Interconnect (DCI) solution that ensures high availability and low latency between two geographically dispersed data centers. The engineer considers using a combination of MPLS and Ethernet over MPLS (EoMPLS) for this purpose. Given the requirements for redundancy and bandwidth optimization, which configuration would best achieve these goals while minimizing the risk of packet loss during peak traffic periods?

Accepted Answer

Implementing a dual-homed architecture with MPLS Layer 2 VPNs and EoMPLS, utilizing Equal-Cost Multi-Path (ECMP) routing for load balancing across multiple links.

Question 26

In a service provider network, a network engineer is tasked with configuring both static and dynamic routing protocols to optimize the routing table for a multi-site organization. The organization has three main sites: Site A, Site B, and Site C. Site A has a static route to Site B with a next-hop IP address of 192.168.1.1 and a static route to Site C with a next-hop IP address of 192.168.2.1. Meanwhile, Site B uses OSPF as its dynamic routing protocol and has a link to Site C with a cost of 10. If the OSPF cost to reach Site C from Site B is lower than the static route cost from Site A to Site C, which routing method will be preferred by Site A when sending packets to Site C, and why?

Accepted Answer

The dynamic route via OSPF will be preferred due to its lower cost.

Question 27

In a service provider network, a router is configured with multiple interfaces, each belonging to different subnets. The router is tasked with forwarding packets between these subnets. If a packet arrives at the router with a destination IP address of 192.168.10.5, and the router has the following interfaces configured:

Accepted Answer

nterface 1: 192.168.10.1/24

Question 28

In a service provider network, you are tasked with implementing Quality of Service (QoS) to ensure that voice traffic is prioritized over general data traffic. Given that the network has a total bandwidth of 1 Gbps and the voice traffic requires a minimum of 256 Kbps to maintain call quality, while the data traffic can tolerate some delay, how would you configure the QoS policies to ensure that voice packets are given priority? Assume that the voice traffic is 20% of the total traffic during peak hours. What is the minimum bandwidth that should be reserved for voice traffic, and how would you classify and mark the packets to achieve this?

Accepted Answer

Reserve 256 Kbps for voice traffic and use Differentiated Services Code Point (DSCP) values to mark voice packets.

Question 29

In a service provider environment, a customer is experiencing intermittent connectivity issues with their broadband service. The service provider\'s technical support team has gathered the following data: the average latency is 50 ms, packet loss is at 2%, and the bandwidth is 100 Mbps. The customer reports that the issues occur primarily during peak usage hours. Given this scenario, which approach should the service provider take to effectively communicate with the customer and address their concerns?

Accepted Answer

Provide a detailed explanation of the network's performance metrics and suggest a bandwidth upgrade during peak hours.

Question 30

In a network automation scenario, you are tasked with writing a Python script that connects to multiple network devices using SSH to gather interface statistics. The script needs to handle exceptions, ensure secure connections, and parse the output to extract specific metrics such as interface status and traffic statistics. Which of the following best describes the approach you should take to achieve this?

Accepted Answer

Utilize the Paramiko library for SSH connections, implement try-except blocks for error handling, and use regular expressions to parse the output for specific metrics.

CISCO 350-501 Implementing and Operating Cisco Service Provider Network Core Technologies Free Practice Test — 30 Questions

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