I am using Windowns-7 and installed Websphere ND 8 on my machine. I am logged in as admin into my machine and also to Websphere. But I am missing some menu items like Cluster, Node etc under "Servers". Could you please let me know if I am missing any settings.
Probably you have setup an Application Server Profile after binary installation. This results in a single server environment where admin console application is also run in your server process. In order to see clusters, nodes etc in the menus, you must run admin console in a deployment manager process.
In order to do so you must create a deployment manager profile using Profile Management Tool. For actually creating a federated environment you shall also create nodes and federate them, which will contain your application servers and clusters.