How do I configure Site link in Active Directory

In Active Directory, a site link is a logical connection between two or more sites that enables domain controllers in different sites to replicate directory data with each other. Site links are used to replicate directory data between sites in a multiple-site network.
To configure a site link in Active Directory, follow these steps:

1. Open the Active Directory Sites and Services console. You can do this by going to

   Start -> Administrative Tools -> Active Directory Sites and Services.
   

2. In the console tree, expand the Sites container and then select the Inter-Site Transports folder.
3. Right-click the folder and select New Site Link.
4. In the New Object - Site Link dialog box, enter a name for the site link and select the sites that you want to include in the link.
5. Click OK to create the site link.
6. To modify the properties of the site link, right-click the site link and select Properties.
7. In the Properties dialog box, you can modify the following settings:

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1. Replication Frequency: This setting determines how often replication between the sites will occur.
2. Replication Schedule: This setting determines the specific times when replication between the sites will occur.
3. Cost: This setting determines the relative cost of using the site link for replication. Higher cost values are used for slower or more expensive links.
4. Transport: This setting determines the transport protocol that will be used for replication over the site link. The default transport is the Remote Procedure Call (RPC) over IP.