Hi Ghofran,
The first problem is not the Portal issue, but rather the system.
You have two options:
1. If this portal is only for testing, you may add FQDN to the hosts file like in the following string:
10.1.1.5 portal.domain.com
and then distribute this file to all machines taking part in your test.
2. If the portal will be accessed from the large number of clients, ask your IT to add your machine to domain zone in your DNS.
You may also need to add domain suffix to the IP configuration on your portal machine.
Anyway, it would be a good idea to consult with your IT manager.
When you will configure the Web Adapter, think the second problem also will gone.
Regards,
Gennady