CISCO 300-410 Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) Free Practice Test — 30 Questions

Question 1

In a BGP network, you are troubleshooting a situation where a specific route is not being advertised to a peer. You have verified that the route exists in the routing table and that the BGP session is established. You suspect that the issue may be related to route filtering. Which of the following actions would most likely resolve the issue?

Accepted Answer

Check the route map applied to the BGP neighbor for any deny statements that might be filtering the route.

Question 2

In a large enterprise network, a network engineer is tasked with implementing policy-based automation to manage the routing protocols dynamically based on network performance metrics. The engineer decides to use a combination of Cisco DNA Center and Cisco IOS XE to achieve this. Given the following performance metrics: latency, jitter, and packet loss, which policy should the engineer prioritize to ensure optimal routing decisions and maintain service level agreements (SLAs)?

Accepted Answer

Implement a policy that prioritizes routes with the lowest latency and packet loss, while allowing for some jitter within acceptable thresholds.

Question 3

In a network automation scenario, a network engineer is tasked with developing an API that retrieves device configurations from multiple routers in a Cisco environment. The engineer decides to implement RESTful APIs for this purpose. Given the requirements for efficient data retrieval and manipulation, which of the following principles should the engineer prioritize when designing the API to ensure it adheres to RESTful architecture?

Accepted Answer

Statelessness of the API interactions

Question 4

In a BGP network, you are tasked with implementing MD5 authentication to secure the BGP sessions between two routers, Router A and Router B. Router A has an MD5 password of \"SecurePass123\" and Router B has the same password configured. However, you notice that the BGP session is not establishing. After verifying the configurations, you suspect that there might be an issue with the way the MD5 authentication is being applied. Which of the following scenarios best describes a potential reason for the BGP session failure despite having the correct MD5 password configured on both routers?

Accepted Answer

The MD5 authentication is not enabled on the BGP neighbor configuration on one of the routers.

Question 5

A network administrator is tasked with generating a report on the performance metrics of a newly deployed routing protocol across multiple branches of a company. The report needs to include metrics such as latency, packet loss, and jitter over a period of one week. The administrator decides to use SNMP (Simple Network Management Protocol) to gather this data. Which of the following techniques would be most effective for ensuring that the report accurately reflects the performance of the routing protocol across all branches?

Accepted Answer

Implementing SNMP polling at regular intervals and using a centralized SNMP manager to aggregate the data from all branches.

Question 6

In a network where both OSPF and EIGRP are being utilized, a network engineer is tasked with redistributing routes between these two protocols. The engineer needs to ensure that the EIGRP routes are redistributed into OSPF with a metric that reflects the bandwidth and delay of the EIGRP routes. Given that the EIGRP routes have a bandwidth of 1 Gbps and a delay of 10 ms, what would be the appropriate metric to use for the redistribution into OSPF, considering the default OSPF metric calculation?

Accepted Answer

20

Question 7

A company is implementing a Remote Access VPN solution to allow employees to securely connect to the corporate network from various locations. The network administrator is tasked with configuring the VPN to ensure that all traffic is encrypted and that users can access internal resources seamlessly. The administrator decides to use IPsec with IKEv2 for the VPN setup. Which of the following configurations would best ensure that the VPN provides both confidentiality and integrity for the data being transmitted, while also allowing for efficient key management?

Accepted Answer

Configure IPsec with ESP (Encapsulating Security Payload) in tunnel mode, using AES-256 for encryption and SHA-256 for integrity, along with IKEv2 for key exchange.

Question 8

In a network utilizing OSPF, you notice that a specific router is not receiving OSPF updates from its neighbors. After verifying the physical connectivity and ensuring that the OSPF process is running, you decide to check the OSPF configuration. You find that the router is configured with a different OSPF area than its neighbors. What is the most likely consequence of this misconfiguration, and how can it be resolved effectively?

Accepted Answer

The router will not form OSPF adjacencies with its neighbors, and you should configure it to use the same OSPF area as its neighbors.

Question 9

In a corporate network, a security analyst is tasked with implementing a new firewall policy to enhance the security posture of the organization. The policy must restrict access to sensitive internal resources while allowing necessary external communications for business operations. The analyst decides to use a combination of stateful and stateless filtering techniques. Which of the following best describes the implications of using both filtering techniques in this scenario?

Accepted Answer

Stateful filtering allows the firewall to track the state of active connections, enabling it to make more informed decisions about allowing or denying packets based on the context of the traffic flow, while stateless filtering applies predefined rules without considering the state of the connection.

Question 10

A network engineer is tasked with designing a subnetting scheme for a corporate network that requires at least 500 usable IP addresses in each subnet. The organization has been allocated the IPv4 address block of 192.168.0.0/22. How many subnets can the engineer create, and what will be the subnet mask for each subnet?

Accepted Answer

4 subnets with a subnet mask of /24

Question 11

In a corporate network, a network engineer is tasked with implementing Quality of Service (QoS) to prioritize voice traffic over regular data traffic. The engineer decides to classify and mark packets using Differentiated Services Code Point (DSCP) values. If the voice traffic is assigned a DSCP value of 46, what is the expected behavior of the network devices when handling these packets, and how does this classification impact the overall network performance?

Accepted Answer

The packets marked with DSCP 46 will receive expedited forwarding treatment, ensuring low latency and high priority over other traffic types.

Question 12

A company has been allocated the IP address block 192.168.0.0/24 for its internal network. The network administrator needs to create 4 subnets to accommodate different departments: HR, IT, Sales, and Marketing. Each department requires at least 30 usable IP addresses. What subnet mask should the administrator use to ensure that each department has enough addresses, and what will be the first usable IP address for the HR department?

Accepted Answer

255.255.255.192; First usable IP: 192.168.0.1

Question 13

In a network environment utilizing Hot Standby Router Protocol (HSRP), you have two routers, R1 and R2, configured as HSRP peers. R1 is assigned the virtual IP address of 192.168.1.1, and the HSRP group number is 1. The priority of R1 is set to 110, while R2 has a priority of 100. If R1 goes down, what will be the new active router, and how will the HSRP configuration ensure continuity of service?

Accepted Answer

R2 will become the active router due to its lower priority value.

Question 14

In a network monitoring scenario, a network engineer is tasked with analyzing the performance of a newly implemented routing protocol across multiple branches of a company. The engineer collects data on packet loss, latency, and jitter over a period of one week. To effectively report these findings, the engineer decides to use a combination of statistical techniques to summarize the data. Which of the following reporting techniques would be most effective in providing a comprehensive overview of the network performance, considering both central tendency and variability?

Accepted Answer

Utilizing both mean and standard deviation to summarize the packet loss and latency data

Question 15

In a Segment Routing (SR) environment, a network engineer is tasked with optimizing the path taken by data packets from a source node A to a destination node D. The network topology consists of nodes A, B, C, and D, with the following link weights: A to B has a weight of 10, B to C has a weight of 5, and C to D has a weight of 15. The engineer decides to implement Segment Routing with a focus on minimizing the overall path cost. If the engineer uses a Segment Identifier (SID) for each node, what would be the optimal path and the total cost associated with it?

Accepted Answer

A → B → C → D with a total cost of 30

Question 16

In a corporate environment, a network engineer is tasked with configuring a Cisco Wireless LAN Controller (WLC) to manage multiple access points (APs) across different floors of a building. The engineer needs to ensure that the WLC can handle a maximum of 200 concurrent client connections per access point while maintaining a minimum throughput of 1 Mbps per client. If the total bandwidth available for the wireless network is 100 Mbps, what is the maximum number of access points that can be deployed without exceeding the bandwidth limit, assuming all access points are fully utilized?

Accepted Answer

50

Question 17

In a network utilizing Gateway Load Balancing Protocol (GLBP), you have three routers (R1, R2, and R3) configured as GLBP group members. The virtual IP address for the GLBP group is 192.168.1.1, and the routers have the following weights assigned: R1 has a weight of 100, R2 has a weight of 200, and R3 has a weight of 300. If a client sends a request to the virtual IP, how will GLBP determine which router to respond with, and what will be the load distribution among the routers?

Accepted Answer

R3 will respond to the client, and the load will be distributed as follows: R1 - 16.67%, R2 - 33.33%, R3 - 50%

Question 18

In a BGP environment, a network engineer is tasked with optimizing the path selection for outbound traffic from their Autonomous System (AS) to a peer AS. The engineer has the following BGP attributes to consider: AS Path, Local Preference, and MED (Multi-Exit Discriminator). Given that the AS Path length is 4 for one route, 3 for another, and the Local Preference values are set to 200 and 100 respectively, while the MED values are both set to 50, which route will BGP select as the best path for outbound traffic?

Accepted Answer

The route with the shorter AS Path length of 3 and a Local Preference of 200

Question 19

In a Segment Routing (SR) environment, a network engineer is tasked with optimizing the path taken by data packets from a source node A to a destination node D. The network topology consists of nodes A, B, C, and D, with the following link weights: A to B = 10, A to C = 5, B to D = 15, C to D = 10, and B to C = 5. The engineer decides to use Segment Routing to define a specific path for the packets. If the engineer specifies the segments as follows: Segment 1 (A to C), Segment 2 (C to D), and Segment 3 (B to D), what is the total cost of the path defined by these segments, and which segment routing approach would yield the most efficient path in terms of cost?

Accepted Answer

The total cost is 15, and the most efficient path is A → C → D.

Question 20

In a corporate network, a network engineer is tasked with implementing policy-based automation to manage the routing of traffic based on specific business requirements. The engineer decides to use Cisco\'s Application Policy Infrastructure Controller (APIC) to define policies that will dynamically adjust routing based on application performance metrics. If the network experiences a 30% increase in traffic for a critical application, which of the following actions should the engineer configure in the policy to ensure optimal performance and resource allocation?

Accepted Answer

Increase the bandwidth allocation for the application and reroute traffic to less utilized links.

Question 21

A network engineer is tasked with configuring a Cisco Wireless LAN Controller (WLC) to manage multiple access points across a large corporate campus. The engineer needs to ensure that the WLC can handle a high number of concurrent client connections while maintaining optimal performance. The WLC is set to operate in a centralized mode, and the engineer must decide on the appropriate configuration for the maximum number of clients per access point. Given that each access point can support a maximum of 200 clients, and the WLC is managing 50 access points, what is the total maximum number of clients that can be supported across the entire network? Additionally, the engineer must consider the impact of enabling Quality of Service (QoS) features on the overall client capacity. If enabling QoS reduces the maximum client capacity by 10%, what will be the new total maximum number of clients supported?

Accepted Answer

9000 clients

Question 22

A network engineer is tasked with configuring a Cisco Wireless LAN Controller (WLC) to manage multiple access points across a large corporate campus. The engineer needs to ensure that the WLC can handle a high number of concurrent client connections while maintaining optimal performance. The WLC is set to operate in a centralized mode, and the engineer must decide on the appropriate configuration for the maximum number of clients per access point. Given that each access point can support a maximum of 200 clients, and the WLC is managing 50 access points, what is the total maximum number of clients that can be supported across the entire network? Additionally, the engineer must consider the impact of enabling Quality of Service (QoS) features on the overall client capacity. If enabling QoS reduces the maximum client capacity by 10%, what will be the new total maximum number of clients supported?

Accepted Answer

9000 clients

Question 23

In a corporate network, a company is utilizing Port Address Translation (PAT) to allow multiple internal devices to share a single public IP address for outbound traffic. The internal network consists of 50 devices, each assigned a unique private IP address in the range of 192.168.1.1 to 192.168.1.50. The company’s router is configured to use PAT with the public IP address of 203.0.113.5. If all devices attempt to access the internet simultaneously, how many unique port numbers will the router need to manage the connections, assuming that each device can establish up to 10 simultaneous connections?

Accepted Answer

500

Question 24

In a corporate network utilizing OSPF for routing, the network administrator decides to implement OSPF authentication to enhance security. The administrator configures OSPF to use MD5 authentication on all routers within the OSPF area. During a routine check, the administrator discovers that one of the routers is not accepting OSPF updates from its neighbors. Upon investigation, it is found that the router has been configured with a different MD5 password than the rest of the routers in the area. What is the most likely outcome of this configuration issue, and how should the administrator resolve it?

Accepted Answer

The router will not form OSPF adjacencies with its neighbors due to the password mismatch, and the administrator should ensure that all routers share the same MD5 password.

Question 25

In a large enterprise network, a network engineer is tasked with implementing OSPF (Open Shortest Path First) for optimal routing. The network consists of multiple areas, including a backbone area (Area 0) and several non-backbone areas. The engineer needs to ensure that inter-area routing is efficient and that route summarization is applied to reduce the size of the routing table. Given the following configurations for Area 1 and Area 2, which configuration would best optimize OSPF routing while ensuring that the routing table remains manageable?

Accepted Answer

Configure OSPF route summarization on the ABR (Area Border Router) between Area 0 and Area 1, summarizing the routes from Area 1 into a single route.

Question 26

In a corporate network, a DHCP server is configured to allocate IP addresses from the range 192.168.1.100 to 192.168.1.200. The server is set to lease IP addresses for a duration of 24 hours. If a device requests an IP address at 10:00 AM and subsequently renews its lease at 11:00 AM, what will be the expiration time of the lease for that device?

Accepted Answer

10:00 AM the next day

Question 27

A network engineer is troubleshooting a connectivity issue in a corporate environment where multiple VLANs are configured. The engineer uses a combination of tools to diagnose the problem. After verifying the physical connections and ensuring that the devices are powered on, the engineer decides to check the VLAN configuration on the switches. Which tool would be most effective for this task, considering the need to analyze the VLAN membership and trunking status across multiple switches?

Accepted Answer

Cisco IOS command-line interface (CLI) commands

Question 28

In a corporate network, a router is configured to use Port Address Translation (PAT) to allow multiple internal devices to access the internet using a single public IP address. If the internal network has 50 devices, and the router is set to use the public IP address of 203.0.113.5, how many unique port numbers can the router use for PAT to differentiate between the internal devices? Assume that the range of port numbers available for PAT is from 1024 to 65535.

Accepted Answer

64512

Question 29

In a corporate network, a network engineer is tasked with optimizing the routing performance between multiple branch offices connected via a central data center. The engineer decides to implement OSPF (Open Shortest Path First) as the routing protocol. Given that the network consists of several OSPF areas, including a backbone area (Area 0) and multiple non-backbone areas, the engineer needs to ensure efficient routing and minimize routing table size. What is the most effective strategy to achieve this while maintaining OSPF\'s hierarchical design?

Accepted Answer

Implement summarization at the ABR (Area Border Router) between the backbone area and non-backbone areas.

Question 30

In a network automation scenario, a network engineer is tasked with implementing a Python script that utilizes the Netmiko library to automate the configuration of multiple Cisco routers. The script needs to connect to each router, execute a series of commands to configure OSPF, and then verify the configuration by checking the OSPF neighbor relationships. If the engineer needs to ensure that the script can handle exceptions and log errors effectively, which of the following approaches should be prioritized in the script design?

Accepted Answer

Implementing try-except blocks to catch exceptions and logging errors to a file for later analysis.

CISCO 300-410 Implementing Cisco Enterprise Advanced Routing and Services (ENARSI) Free Practice Test — 30 Questions

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