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<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><span style="font-family: ";Arial";,";sans-serif";;">Domains are managed by using a worldwide system of domain registrars and databases. </span><span style="font-family: ";Arial";,";sans-serif";; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;">The </span><span style="font-family: ";Arial";,";sans-serif";; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;"> Domain Name System DNS are the Internet&#8217;s equivalent of a phone book. They maintain a directory of domain names and translate them to Internet Protocol (IP) addresses.<br /></span><span style="font-family: ";Arial";,";sans-serif";; font-size: 12.0pt; line-height: 115%; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;">For example, mail.contoso.com is a domain name with the following three levels:</span><span style="font-family: ";Arial";,";sans-serif";;"></span></div>
<ul type="disc">
<li style="line-height: normal; margin-bottom: 12.0pt; mso-list: l0 level1 lfo1; mso-margin-top-alt: auto; tab-stops: list 36.0pt;"><b><span style="font-family: ";Arial";,";sans-serif";; font-size: 12.0pt; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;">.com</span></b><span style="font-family: ";Arial";,";sans-serif";; font-size: 12.0pt; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;"> is the top-level domain</span></li>
<li style="line-height: normal; margin-bottom: 12.0pt; mso-list: l0 level1 lfo1; mso-margin-top-alt: auto; tab-stops: list 36.0pt;"><b><span style="font-family: ";Arial";,";sans-serif";; font-size: 12.0pt; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;">contoso</span></b><span style="font-family: ";Arial";,";sans-serif";; font-size: 12.0pt; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;"> is the second-level domain</span></li>
<li style="line-height: normal; mso-list: l0 level1 lfo1; mso-margin-bottom-alt: auto; mso-margin-top-alt: auto; tab-stops: list 36.0pt;"><b><span style="font-family: ";Arial";,";sans-serif";; font-size: 12.0pt; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;">mail</span></b><span style="font-family: ";Arial";,";sans-serif";; font-size: 12.0pt; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;"> is the third-level domain </span></li>
</ul>
<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"></div>
<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";; font-size: 13.0pt; line-height: 115%; mso-bidi-font-size: 11.0pt;">DNS Record Types and Function</span></b></div>
<div style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";;"><br />MX Record</span></b></div>
<div style="line-height: normal; mso-margin-bottom-alt: auto;"><span style="font-family: ";Arial";,";sans-serif";; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;">Mail Exchange (MX) records direct a domain&#8217;s email to the servers hosting the domain&#8217;s user accounts. ;</span></div>
<div style="line-height: normal; mso-margin-bottom-alt: auto;"></div>
<div style="line-height: normal; margin-bottom: .0001pt; margin-bottom: 0cm; mso-margin-top-alt: auto;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";; mso-fareast-font-family: ";Times New Roman";; mso-fareast-language: EN-GB;">TXT Record</span></b></div>
<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><span style="font-family: ";Arial";,";sans-serif";;">A TXT record is a DNS record that provides text information to sources outside your domain, that can be used for a number of arbitrary purposes like domain ownwership etc. The record&#8217;s value can be either human- or machine-readable text.</span></div>
<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"></div>
<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";;">CNAME Record</span></b></div>
<div><span style="font-family: ";Arial";,";sans-serif";;">A Canonical Name or CNAME record is a type of DNS record that maps an alias name to a true or <em><span style="font-family: ";Arial";,";sans-serif";;">canonical</span></em>domain name. CNAME records are typically used to map a subdomain such as <em><span style="font-family: ";Arial";,";sans-serif";;">www</span></em> or <em><span style="font-family: ";Arial";,";sans-serif";;">mail</span></em> to the domain hosting that subdomain’s content. For example, a CNAME record can map the web address <em><span style="font-family: ";Arial";,";sans-serif";;">www.example.com</span></em> to the actual web site for the domain <em><span style="font-family: ";Arial";,";sans-serif";;">example.com</span></em>.</span></div>
<div></div>
<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";;">A Record</span></b></div>
<div><span style="font-family: ";Arial";,";sans-serif";;">An A record maps a domain to the physical IP address of the computer hosting that domain. Internet traffic uses the A record to find the computer hosting your domain&#8217;s DNS settings. The value of an A record is always an IP address, and multiple A records can be configured for one domain name.</span></div>
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<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";;">NS Record</span></b></div>
<div><span style="font-family: ";Arial";,";sans-serif";;">Name server (NS) records determine which servers will communicate DNS information for a domain. Generally, you have primary and secondary name server records for your domain. When using Google for Work services, you may configure NS records that point to Google servers for DNS queries.</span></div>
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<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";;">TTL</span></b></div>
<div><span style="font-family: ";Arial";,";sans-serif";;"><span style="mso-spacerun: yes;"> ;</span>The TTL is a value in a DNS record that determines the number of seconds before subsequent changes to the record go into effect. Each of your domain&#8217;s DNS records, such as an MX record, CNAME record, and so on, has a TTL value. A record&#8217;s current TTL determines how long it will take any change you make now to go into effect.</span></div>
<div></div>
<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";;">URL</span></b></div>
<div><span style="font-family: ";Arial";,";sans-serif";;">A URL is the web address of a resource on the Internet. This is the address you type in a browser to visit a particular web site. For example, the URL of the google <a href="http://www.google.com/">www.google.com</a></span></div>
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<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";;">SPF (sender policy framework)</span></b></div>
<div><span style="font-family: ";Arial";,";sans-serif";;">An email validation system designed to help prevent email spoofing and phishing.</span></div>
<div></div>
<div style="margin-bottom: .0001pt; margin-bottom: 0cm;"><b style="mso-bidi-font-weight: normal;"><span style="font-family: ";Arial";,";sans-serif";;">SRV (service record)</span></b></div>
<div><span style="font-family: ";Arial";,";sans-serif";;">Specifies information about available services. SRV records are used by some Microsoft cloud services such as Lync Online and Exchange Online to coordinate the flow of information between services.</span></div>
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<div><span style="font-family: ";Arial";,";sans-serif";;">Credit: Google, Microsoft,Technet </span></div>
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Cyber Security | Digital Transformation | Cloud Computing
