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WINDOWS SERVER ADMINISTRATION (CHAPTER 1) …
WINDOWS SERVER ADMINISTRATION (CHAPTER 1) DNS In Windows Server Environment
1.1.1 (Define the structures of DNS)
Introduction Of DNS
:check:distributed hierachical
distributed :check:no single database contains all data
hierachical :check:no structure to how information is stored & accessed in database
allow to resolve a hostname
The Stucture of DNS
The entire DNS tree is called the DNS namespace
each domain has one or more servers
ROOT SERVERS keep a database of addresses of other DNS servers (TLD) Top Level domain servers
1.1.3 Follow steps in installing DNS with Active Directory
DNS resolve names and services to IP addresses when domain controllers replicate with one another and trusts are created between domains in different forests.
Essential for a well-functioning network is a correctly configured and efficiently functioning DNS service
Installing the DNS Server role with Server Manager or PowerShell
DNS Server role should be installed on a domain controller
1.1.2 (Explain DNS lookup process and DNS server roles)
The DNS Database
Zone
a grouping of DNS information
represents one or more domains and sub-domains
records type called resource records :star:static updates :star:dynamic updates
The DNS Lookup Process
Two types :star:Iterative Queries :star:Recursive Query
Iterative Queries = A client asks the DNS server for an answer and the server returns the best answer
Recursive Query = The client sends a query to a name server
Roles for zone
Authoritative server (holds a complete copy of a zone's resource records
Forwarder (DNS server to other DNS servers send requests the cant resolve
Conditional forwarder (DNS server to other DNS servers send requests targeted for specific domain
Caching-only server (to field DNS queries)
1.1.4 Complete DNS zones creation
3 Types:
:star:Primary Zones
:star: Secondary Zones
:star: Stub Zones
Primary Zones
:check: responsible fot maintaining all of the records for the DNS zone.
:check: contains primary copy of the DNS database.
Types of Primary Zone:
:check: Primary zone
:check: Primary zone with Active Directory Integration (Active Directory DNS)
Disadvantages of Local Database:
:check: Lack of Fault Tolerance
:check: Additional Network Traffic
:check: No security
Secondary Zones
:check:contains a database with all of the same information as the primary zone
Advantages :
:check: provides fault tolerance
:check: increase network performances by offloading some of the traffic
Stub Zones:
:check: work a lot like secondary zones