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Chapter 2. Configuring Name Resolution Methods. Objectives. Understanding Name Resolution in Windows Server 2008 Networks DNS Name Resolution Configuring DNS Client Settings Creating and Configuring Zones. Name Resolution in Windows 2k8. Why is name resolution ?

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chapter 2

Chapter 2

Configuring Name Resolution Methods

Lecturer : Ms.Trần Thị Ngọc Hoa

objectives
Objectives
  • Understanding Name Resolution in Windows Server 2008 Networks
  • DNS Name Resolution
  • Configuring DNS Client Settings
  • Creating and Configuring Zones

Lecturer : Ms.Trần Thị Ngọc Hoa

name resolution in windows 2k8
Name Resolution in Windows 2k8
  • Why is name resolution ?
  • Three name resolution services
    • DNS – Domain Name Service
    • Link Local Multicast Name Resolution – LLMNR
    • NETBIOS – Network Basic Input Output System

Lecturer : Ms.Trần Thị Ngọc Hoa

dns name resolution
DNS Name Resolution
  • DNS Name Space
  • Internet Corporation for Assigned Names and Numbers (ICANN)
  • Three types of top-level domains exist:
    • Organizational domains
    • Geographical domains
    • Reverse domains

Lecturer : Ms.Trần Thị Ngọc Hoa

domain names fqdn
Domain Names - FQDN
  • www.howstuffworks.com - a typical name
  • www.yahoo.com - the world's best-known name
  • www.mit.edu - a popular EDU name
  • encarta.msn.com - a Web server that does not start with www
  • www.bbc.co.uk - a name using four parts rather than three
  • ftp.microsoft.com - an FTP server rather than a Web server

Lecturer : Ms.Trần Thị Ngọc Hoa

dns structure
DNS Structure
  • DNS servers
    • Contains database information about some portion of the DNS domain tree structure
    • Resolve name resolution queries issued by DNS clients
    • A server is authoritative for a domain when that server relies on locally hosted database data
  • DNS zones
    • a contiguous domain name for which a server is authoritative
    • Forward lookup zones
    • Reverse lookup zones

Lecturer : Ms.Trần Thị Ngọc Hoa

dns structure cont
DNS Structure (cont)
  • DNS resolvers
    • Service
    • Query for information from DNS servers
  • Resource records
    • DNS database entries that are used to answer DNS client queries
    • Example :
      • A : IPv4 host address
      • AAAA : IPv6 host address

Lecturer : Ms.Trần Thị Ngọc Hoa

understanding server types
Understanding Server Types
  • Primary servers :
      • Host primary zone
      • Central point of update
      • Newly created zones are this type
      • Two ways of deployment
        • Standard : Single point of failure
        • Active Directory integrated :
          • Zone data is stored and replicated in Active Directory
          • Fault tolerance
        • Domain controller is also the primary DNS server in the domain

Lecturer : Ms.Trần Thị Ngọc Hoa

understanding server types cont
Understanding Server Types (cont)
  • Secondary servers :
    • Host secondary zone
    • Load sharing and backup solution
  • Stub servers :
    • Host stub zone
    • Enable a parent zone to keep an updated list of the name servers available in a child zone
  • Caching only servers :
    • Do not host any zones
    • Queries caching
    • Minimize name resolution traffic across WAN links

Lecturer : Ms.Trần Thị Ngọc Hoa

understanding recursion and iteration
Understanding Recursion and Iteration
  • Recursion refers to the process of a DNS server querying other DNS servers on behalf of an original querying client
  • Iterationrefers to the process of a DNS client making repeated queries to different DNS servers.
  • Using root hint referrals from the DNS server
  • WINDOWS\System32\Dn\Cache.dns

Lecturer : Ms.Trần Thị Ngọc Hoa

lab demo
Lab Demo

server.cse.hui.edu.vn

192.168.1.254

clnt1.cse.hui.edu.vn

192.168.1.1

clnt2.cse.hui.edu.vn

192.168.1.2

Lecturer : Ms.Trần Thị Ngọc Hoa