DNS Questions and Answers

There are some list of definitions in terms of Questions and answers relating to DNS which i have taken from different sources and gathered here

What Is DNS

What does Active directory integrated DNS mean

What is a Zone?

What port DNS operates on? 53

What is A record : (The A in A record stands for Address. Simply put, an A record is used to find the address of a computer connected to the internet from a name. Whenever you visit a web site, send an email, connect to Twitter or Facebook or do almost anything on the Internet, the address you enter is a series of words connected with dots.)

What is Host record (The Domain Name System, more popular as DNS, is responsible for associating domain names, the user-friendly names of websites, with their corresponding real system names – IP addresses. These IP addresses are vital for bringing the website online and in the DNS system are known as A records.)

What is Glue Record (A glue record is a term for a record that’s served by a DNS server that’s not authoritative for the zone, to avoid a condition of impossible dependencies for a DNS zone.)

What is PTR Record (Pointer records are used for the reverse DNS (Domain Name System) lookup. Using the IP address you can get the associated domain/hostname. An A record should exist for every PTR record.)

What is Forward lookup zone

What is Reverse lookup zone

What is Alias record (An ALIAS record is a virtual record type that we created to provide CNAME-like behavior on apex domains)

What is Cname record (CNAME stands for Canonical Name. CNAME records can be used to alias one name to another)

What is MX Record (An MX (Mail eXchange) record will redirect email sent to any user’s machine (joe@norbert.dept1.cornell.edu, for example) to a designated mailhost. It tells the MDA where to route email)

What is default priority for MX record : 10

What is SRV record (A Service record (SRV record) is a specification of data in the Domain Name System defining the location, i.e. the hostname and port number, of servers for specified services. It is defined in RFC 2782, and its type code is 33)

What tool can be used for DNS troubleshooting (NSLOOKUP)

What is DCDiag.exe (DC Diagnostic Tool)

What is Repmon.exe (Replication Monitor)

What is FRSDiag.exe (File Replication Diagnostic Tool)

What is Netlogon service, what does it do? (A service that is responsible for communication between systems in response to account logon events)

What is root hint servers (Root hints are used to prepare servers authoritative for non-root zones so that they can learn and discover authoritative servers that manage domains located at a higher level or in other subtrees of the DNS domain namespace)

How many root hint servers available by default 13

List of Root Servers

Hostname IP Addresses Manager
a.root-servers.net, 2001:503:ba3e::2:30 VeriSign, Inc.
b.root-servers.net, 2001:500:84::b University of Southern California (ISI)
c.root-servers.net, 2001:500:2::c Cogent Communications
d.root-servers.net, 2001:500:2d::d University of Maryland
e.root-servers.net NASA (Ames Research Center)
f.root-servers.net, 2001:500:2f::f Internet Systems Consortium, Inc.
g.root-servers.net US Department of Defence (NIC)
h.root-servers.net, 2001:500:1::803f:235 US Army (Research Lab)
i.root-servers.net, 2001:7fe::53 Netnod
j.root-servers.net, 2001:503:c27::2:30 VeriSign, Inc.
k.root-servers.net, 2001:7fd::1 RIPE NCC
l.root-servers.net, 2001:500:3::42 ICANN
m.root-servers.net, 2001:dc3::35 WIDE Project

Where do I locate root hint servers in DNS


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