200-301 Question 107
Select 3A company is deploying a global content delivery network (CDN) and wants to use Anycast to improve user experience. Which of the following statements about Anycast are correct?
- A
Anycast allows multiple servers to share the same IP address, routing traffic to the nearest server based on routing protocols.
- B
Anycast guarantees that all users will always reach the same server regardless of their geographical location.
- C
Anycast improves redundancy and failover capabilities by dynamically rerouting traffic if a server becomes unavailable.
- D
Anycast is typically used to distribute data between servers in a single local area network (LAN).
- E
Anycast can help reduce latency for users by directing their requests to the closest server.
Show answer and explanation
Correct answers: A, C, E
Explanation
Anycast is a routing technique where multiple servers share the same IP address, and requests are routed to the nearest server based on network topology and routing protocols. This improves redundancy, failover, and latency, making it ideal for applications like content delivery networks and DNS services. However, it does not ensure all users reach the same server and is not limited to local area networks.
- A. Correct.
Correct. Anycast allows multiple servers to share the same IP address, and routing protocols, such as BGP, direct traffic to the nearest server based on network topology.
- B. Incorrect.
Incorrect. Anycast does not guarantee that all users will reach the same server. It routes users to the nearest available server, often based on proximity and routing metrics.
- C. Correct.
Correct. Anycast enhances redundancy since traffic can be dynamically rerouted to another server if one becomes unavailable.
- D. Incorrect.
Incorrect. Anycast is typically used in global or wide-area network scenarios, not just within a local area network (LAN).
- E. Correct.
Correct. One of the key advantages of Anycast is reducing latency by directing user requests to the geographically or topologically closest server.