Thread: Connecting network cables

It is very important to remember that when connected computers in network not only the physically connected, but also connects them electrically. Voltage discharge can damage one or more machines. This is why it is very important to put a good earth physics of the electrical system and avoid surprises.

The DNS is a set of protocols and services that enables users to use names instead of having to remember addresses IP number. This is certainly the role best known of the DNS protocols the assignment of names to IP addresses. For example if the address IP site FTP to 200.64.128.4 prox.ve is most people come to this team and not specifying ftp.prox.ve IP address. Besides being easier to remember, the name is more reliable. The numeric address could change for many reasons, without having to change the name.

Initially the DNS was born of the need to easily remember the names of all servers connected to the Internet. Initially SRI hosted a file called HOSTS.TXT containing all known domain names. The explosive growth of the network caused the system centralized naming the file HOSTS.TXT prove impractical and in 1983, Paul Mockapetris published RFCs 882 and 883 defining what today has evolved into modern DNS.

The Client DNS a program client DNS running on the computer of the user and generates requests DNS resolution of names to server DNS The DNS servers answering customer calls, recursive servers have the ability to forward the request to another server if you do not have the requested address;And the areas of authority portions of the domain name space that handle responses to requests from customers. The area of authority include at least one domain and include sub domains but these usually are delegated to other servers.