Estimate the number of Domain Name System (DNS) servers and the type of DNS server that will be installed in each branch.
Domain Name System (DNS) is a protocol that allows the user to browse and connect to other networks. Usually, computers connect to each other with the help of the IP addresses. However, it is not easy for human beings to recall the names that each IP address has, and thus they assign them specific names that they can remember. When those names are keyed into the computer, the DNS assigns them other names that are readable by the computer. For instance, the user may wish to access the Facebook site and, therefore, key in the www.facebook as the instructions. When the computer receives this instruction, it finds the nearest DNS and requests further elaboration of what site the user may be intending to visit. The DNS provides the IP address for those instructions and returns the report to the computer. The computer then addresses the relevant website, and the page is automatically displayed on the screen.
From the case scenario, the organization has about 25 servers, and it intends to add 30 more servers, now bringing the total to about 55 servers. Moreover, the organization has seven branches, which are located in five estates, and it intends to connect about five thousand people. Accordingly, the organization is required to configure five DNS servers to connect the five estates.
The organization is required to configure both the primary and secondary DNS servers. There is only one primary server in each domain. However, on the other hand, the secondary servers can be one or more. The primary servers are the main domain where all the changes can be made. They are authoritative in charge of all domains on the computer system. Their principal role is to update the secondary servers of the domain periodically. Further, the primary servers are also tasked with the responsibility of synchronizing the secondary servers of the network domain.
On the other hand, the organization can configure one or more secondary servers to enhance efficiency in the network connection. However, this is also a requirement that each domain should have at least one secondary server. But according to the Network Interface Card (NIC), it is recommended that there should be a minimum of two secondary servers to ensure the best performance of the interconnection. Some features of the secondary servers are similar to those of the primary servers, but there is a little distinctiveness. They are authoritative to the domains they are connected to, and they also receive the domain information from the primary servers. Further, since they can be two, the domain information can also be obtained from the other secondary server. Additionally, in case one or more other servers are temporarily unavailable, the secondary servers provide redundancy in such scenarios.