300-420 Question 236
Select 3An enterprise is deploying a large-scale network that spans multiple locations. The design includes ensuring high availability for critical services like DNS and DHCP while maintaining scalability. Which combination of network services should be implemented to achieve these goals?
- A
Deploy redundant DHCP servers with failover capabilities
- B
Implement Anycast for DNS services across multiple locations
- C
Use static IP addressing for all end devices to reduce dependency on DHCP
- D
Centralize DNS and DHCP services in a single data center for simplicity
- E
Integrate IP Address Management (IPAM) for centralized management of IP addresses across the network
Show answer and explanation
Correct answers: A, B, E
Explanation
Achieving scalability and high availability for network services like DNS and DHCP requires a combination of redundancy, distributed architecture, and centralized management tools. Redundant DHCP servers with failover prevent service disruption, Anycast DNS ensures scalable and localized service delivery, and IPAM enables efficient IP address management across the network. Static IP addressing and centralized services in a single location do not align with the goals of scalability and high availability.
- A. Correct.
Deploying redundant DHCP servers with failover ensures high availability for DHCP services, so end devices can obtain IP addresses even if one DHCP server fails.
- B. Correct.
Anycast for DNS services allows multiple DNS servers to share the same IP address, enabling scalability and faster resolution by serving requests from the nearest server.
- C. Incorrect.
Static IP addressing for all devices is not scalable in large networks and increases administrative overhead, making it unsuitable for this scenario.
- D. Incorrect.
Centralizing DNS and DHCP in a single data center creates a single point of failure and reduces fault tolerance, which does not align with the goal of high availability.
- E. Correct.
IP Address Management (IPAM) simplifies the management of IP addresses, ensuring efficient allocation and reducing the risk of conflicts, which is particularly important in scalable designs.