One domain name connects to several IP addresses.
One domain name connects to several IP addresses.
I understand the concept well. There are two common ways to set up A records: linking one IP address to multiple host names, or assigning many IP addresses to a single host name. Recently I learned about the possibility of having one host name point to several IP addresses. That’s correct. You’d want this setup when you need flexibility, such as directing traffic to different servers based on location or load balancing. Web browsers typically require a single IP, but this approach can be useful for more advanced configurations.
Redundancy and failover or load balancing are relevant concepts.
Interesting point! In reality, most systems handle this differently. The DNS would send the requested IP addresses to the program, but typically you'd want a more reliable method. A Round Robin setup could work, allowing DNS to distribute requests evenly, though it might have some limitations. Other configurations exist that better suit your needs.
Typically you'll encounter GSLB operations to connect a domain name across several IP addresses. Many DNS solutions offering this capability also track server load, helping you stay on a less busy node while keeping the same URL.
The accepted response highlights how DNS servers manage multiple IP addresses for a single request. It explains that programs typically connect to one IP at a time, but web browsers can handle several IPs simultaneously. The key configurations mentioned are returning IP addresses in order or using a randomized list, which helps with load balancing and fault tolerance. The discussion emphasizes that Round Robin is an efficient method for distributing requests across servers, making it a practical choice for balancing traffic.
Sorry for the delayed reply, I hadn't finished it sooner. It's actually quite challenging to read, but I'll give it a shot. I'm afraid I'm not familiar with a program or protocol that handles this. However, the rest is clear. As far as I understand, yes. Regarding overloading—doesn't mean load balancing. It comes into play only when the first record times out and then the protocol or application switches to the second one. It's essentially a bridge between load balancing and fault tolerance. I'm still puzzled about your reasoning for using load balancing in DNS, though. Without Round Robin, I wouldn't suggest it at all. If you require multiple A records, then Round Robin would be appropriate. Still, I'm curious about your specific situation.