MCSE 05 Implementing of a Network Infrastructure 07 Theory

8/6/2019 MCSE 05 Implementing of a Network Infrastructure 07 Theory

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ADVANTAGE PRO Chennais Premier Networking Training Center

Windows Internet Naming Service


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What is WINS ?

Windows Internet Name Service (WINS) provides adistributed database for registering and querying dynamic

mappings of Net BIOS names for computers and groups

used on your network.

WINS maps Net BIOS names to IP addresses and was

designed to solve the problems arising from Net BIOS name

resolution in routed environments.

WINS is the best choice for Net BIOS name resolution inrouted networks that use Net BIOS over TCP/IP.


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What is WINS ?


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What is WINS ?1

. A WINS client, HOST-A, registers any of its local NetBIOSnames with WINS-A, its configured WINS server.

2. Another WINS client, HOST-B, queries WINS-A to locate

the IP address for HOST-A on the network.

3. WINS-A replies with the IP address for HOST-A,

192.168.1.20.


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Benefits of using WINS

WINS provides the following benefits for administering your

TCP/IP-based network:

A dynamic name-to-address database that maintains supportfor computer name registration and resolution.

Centralized management of the name-to-address database,

alleviating the need for managing Lmhosts files.


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Reduction of NetBIOS-based broadcast traffic on subnets,by permitting clients to query WINS servers to directly locate

remote systems.

Support for earlier Windows and NetBIOS-based clients on

your network, permitting these types of clients to browse lists

for remote Windows domains without requiring a local

domain controller to be present on each subnet.

Support for DNS-based clients by enabling those clients tolocate NetBIOS resources when WINS lookup integration is

implemented.

Benefits of using WINS


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When it is required ?

For networks with servers running Windows 2000 Server and

all other computers running Windows 2000 Professional,

NetBIOS is no longer required for TCP/IP-based networking.

Because of this change, WINS is needed for most networks

but might not be required in some instances.


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How WINS works ?


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How WINS works ?


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How WINS works ?


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How WINS works ? For NetBIOS name resolution, WINS client typically performs

the following general sequence of steps to resolve a name:

1. Client checks to see if the name queried is its local NetBIOS

computer name, which it owns.

2. Client checks its local NetBIOS name cache of remote

names. Any name resolved for a remote client is placed in

this cache where it remains for10 minutes.


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How WINS works ?4. Client forwards the NetBIOS query to its configured

primary WINS server.

5. If the primary WINS server fails to answer the query--either

because it is not available or because it does not have an

entry for the name--the client will try to contact other

configured WINS servers in the order they are listed and

configured for its use.

6. Client broadcasts the NetBIOS query to the local subnet.


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How WINS works ?

6. Client checks the Lmhosts file for a match to the query, if it

is configured to use the Lmhosts file.

7. Client tries the Hosts file and then a DNS server, if it is

configured for one.


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How WINS works ?


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