Can a machine with a single DNS name have multiple addresses? How could it occur?
To answer your question in short, yes it can happen.
DNS, the Domain Name Service, as you would know, is used to help us resolve Fully Qualified Domain Names (FQDN) to IP addresses. There are different versions of DNS systems running all over the Internet, mainly ranging between Windows (which use the Windows DNS server) and Linux/Unix (using BIND DNS services).
Do you have questions about networking, VPN security or VoIP? Then visit Firewall.cx, one of the few websites recommended by Cisco Systems in its world class Cisco Academy program.
Considering there are some very popular Web sites which serve millions of DNS queries per day e.g., Google.com, Hotmail.com, it is logical that these domain names cannot solely rely on one single DNS server, cause if that fails, the whole domain could become unreachable!
It is, for this reason, a fault-tolerant DNS service is put in place, which shares the DNS queries amongst several different DNS servers. All servers are configured to either randomly provide clients with IP addresses from a specific pool, or -- by using a round robin method -- cycle between the pool of IP addresses. This is what gives a DNS name multiple IP addresses.
Dig Deeper on IP Networking
Related Q&A from Chris Partsenidis1
What is the difference between a circuit switching and packet switching? Our networking fundamentals expert gives examples of packet switching and ...continue reading
Understand the TCP/IP stack and how to check if it is installed on your system in this networking fundamentals expert response.continue reading
Learn how to build a database server farm using different topologies, from network fundamentals expert Chris Partsenidis.continue reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.