Updating zone files on primary dns mark walberg dating
file.) So long as you are internally consistent, you can name the zone data files anything you want.
This flexibility may lead to some confusion when working at different sites or referring to different DNS manuals and books.
Caution - The IP addresses and network numbers used in examples and code samples in this manual are for illustration purposes only.
Do not use them as shown because they may have been assigned to an actual network or host.
You’ll start by dissecting a domain name, and then you’ll learn about the mechanics of DNS resolution, including name servers, zone files, and individual DNS records.
Domain names are best understood by reading from right to left.
To get more in depth understanding, let's use dig tool for First we find the nameservers of example.com: dig NS 2.Understanding DNS might be little confusing for newbies. Let’s say, if we need to access any website what we will do? Hmm that’s all we know, but the fact is, how pain DNS go through it, while querying for us. Globally there are 13 root servers available to resolve the query.At first, while we hit enter as browser will pass a request to our local resolver, which has entry about our master and slave DNS server info.The simplest way of explaining DNS in one line is to map domain name to IP address. MX records (for mail servers) should contain hostnames NOT IPs.I am not sure how many would know that when somebody types a domain name in IE/firefox, the browser forwards the DNS request asking for ip address from the resolver of ISP (ISP Provider) and the resolver contacts the root servers and then systematically retrieves the IP address within a matter of few milliseconds. Glue records are A records that are associated with NS records to provide "bootstrapping" information to the NS records nameserver.