ITCO451 - week 3 - IP.docx - Running Head unit 3 individual project UNIT 3 INDIVIDUAL PROJECT Name Instructor Name Institution Course Date Unit 3

ITCO451 - week 3 - IP.docx - Running Head unit 3 individual...

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Running Head: unit 3 individual project UNIT 3 INDIVIDUAL PROJECT Name: Instructor Name: Institution: Course: Date:
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Unit 3 individuals project 1 As the number of online documents increase with the increase in the size of the network and the workstations, referencing of the internet resources from various domains can become a significant bottleneck in the browsing experience. Such performance bottlenecks stimulate the need for a Domain Name Server (DNS) in the corporate network. A DNS translates domain names into equivalent IP addresses for easy referencing and access across the network [LGK10]. At least one DNS server will be used alongside the web server. There are several advantages of using a DNS. Benefits of using DNS To begin with, DNS is capable of providing security to corporate data. Common approaches used include addition of entropy to requests, rejection of responses that do not meet the required criteria, and the use of Domain Name Security Extensions (DNSSEC) protocol to counter cache poisoning. Secondly, DNS-based redirection can achieve transparency without losing scalability of the entire network infrastructure. Transparency is achieved because the client devices are restricted to use the addresses provided by the authoritative DNS server. The client machine is unable to determine which DNS server provided the address, or the number of client devices relying on the DNS server currently, or the location of the DNS server [JNg12]. Thirdly, DNS is a neutral way of enlightening the client devices about the service addresses. In addition, there is a wide span of DNS- server infrastructure with the capability of supporting the answers generated by the redirector. Fourthly, the use of DNS service presents great maintainability. It is noteworthy, moreover, that DNS servers perform an automatic error checking to avoid any imminent DNS failures. Fifthly, apart from the ease of use, DNS servers are relatively flexible to use. That is, a single DNS server can manage multiple internet subdomains and domains [JNg12].
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Unit 3 individuals project 2 How DNS is used Computers and other network devices use IP addresses to route requests to the destination site. The DNS server manages a massive hierarchical distributed database that maps domain names into equivalent IP addresses using a set of protocols that usually define a mechanism for querying and updating the distributed database, replicating information in the database among the various servers, and a schema of the database [Mic03]. Typically, when a computer is connected to the internet through the ISP, the modem or router that assigns the computer a
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