C: You are not required to create a user account. But, you must create a root
password.
If you create a user account in this panel, you need to provide both the user's password and a root
password.
In this case, root will be a role assigned to the user.
To create a user account, type a username and password. The name must begin with a letter and
can contain only letters and numbers.
If you do not create a user account, you still need to provide a root password.
In this case, root will be a regular user.
Networking Configuration With Text Installer
The networking panel in the text installer provide users with the following options.
Automatically - Configures target system with automatic NCP, similar to the LiveCD installer's
method.
Manually - Selects "DefaultFixed" NCP and provides for static IPv4 configuration of one network
interface (NIC). IPv4 default route and IPv6 autoconfiguration are enabled for that chosen NIC.
This option also provides for manual configuration of DNS, NIS and LDAP naming services.
None - Selects "DefaultFixed" NCP and configures loopback interfaces only.
Reference: Installing Oracle Solaris 11 Systems, How to Perform a Text Installation

The zoneadm command is the primary tool used to install and administer non-global zones. Operations using the zoneadm command must be run from the global zone on the target system.
How to Install the solaris10 Branded Zone
A configured solaris10 branded zone is installed by using the zoneadm command with the install subcommand.
Example: global# zoneadm -z s10-zone install -a /net/machine_name/s10-system.flar -u

Check DNS
* (A) Check whether DNS is configured on your client by verifying that a non-empty
/etc/resolv.conf file exists.
* (F) If /etc/resolv.conf does not exist or is empty, check that your DHCP server is providing DNS server information to the client:
# /sbin/dhcpinfo DNSserv
If this command returns nothing, the DHCP server is not set up to provide DNS server information to the client. Contact your DHCP administrator to correct this problem.
* (B) If an /etc/resolv.conf file exists and is properly configured, check for the following possible problems and contact your system administrator for resolution:
** The DNS server might not be resolving your IPS repository server name.
** No default route to reach the DNS server exists.