Transcript Chapter 1
Chapter 2
Configuring Name
Resolution Methods
Lecturer : Ms.Trần Thị Ngọc Hoa
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
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 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
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
1.
DNS servers
2.
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)
3.
DNS resolvers
4.
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
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)
Secondary servers :
Stub servers :
Host secondary zone
Load sharing and backup solution
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
Recursion refers to the process of a DNS
server querying other DNS servers on behalf
of an original querying client
Iteration refers 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
Domain : cse.hui.edu.vn
NetID :192.168.1.0/24
`
`
server.cse.hui.edu.vn
clnt1.cse.hui.edu.vn
clnt2.cse.hui.edu.vn
192.168.1.254
192.168.1.1
192.168.1.2
Lecturer : Ms.Trần Thị Ngọc Hoa