300-420 Question 237
Select 4An enterprise network is being designed to support a new application that requires low-latency communication between branch offices and the data center. The design must ensure optimal routing and real-time failover in case of a link failure. Which of the following network services should be implemented to meet these requirements?
- A
Dynamic routing protocols such as EIGRP or OSPF
- B
Quality of Service (QoS) to prioritize application traffic
- C
Multiprotocol Label Switching (MPLS) for traffic engineering
- D
Network Address Translation (NAT) to provide private IP addressing
- E
IP SLA (Service Level Agreements) for monitoring link performance
Show answer and explanation
Correct answers: A, B, C, E
Explanation
To meet the low-latency and failover requirements of the application, dynamic routing protocols ensure optimal path selection and fast convergence, QoS prioritizes critical application traffic, MPLS enables predictable routing with traffic engineering, and IP SLA provides proactive monitoring of network performance. NAT, while useful for address translation, does not address the specific requirements of low latency or failover.
- A. Correct.
Dynamic routing protocols such as EIGRP or OSPF enable fast convergence and optimal path selection, which are critical for achieving real-time failover and low-latency communication.
- B. Correct.
Quality of Service (QoS) ensures that the application traffic is prioritized over less critical traffic, which is essential for maintaining low latency.
- C. Correct.
MPLS provides mechanisms for traffic engineering and ensures predictable and efficient routing, which helps achieve the required performance for low-latency applications.
- D. Incorrect.
Network Address Translation (NAT) is used for address translation but does not contribute to achieving low latency or failover capabilities.
- E. Correct.
IP SLA allows proactive monitoring of link performance, ensuring that latency and other metrics are within acceptable thresholds for the application.