checkData();
        return groupName;
    }

/** 
 * Checks the node type of this address.
 * @return {@link jcifs.smb1.netbios.NbtAddress#B_NODE},
 * {@link jcifs.smb1.netbios.NbtAddress#P_NODE}, {@link jcifs.smb1.netbios.NbtAddress#M_NODE},
 * {@link jcifs.smb1.netbios.NbtAddress#H_NODE}
 *
 * @throws UnknownHostException if the host cannot be resolved to find out.
 */ 

     */

    public static final String SMBSERVER_NAME = "*SMBSERVER     ";

    /**
     * A B node only broadcasts name queries. This is the default if a
     * nameserver such as WINS or Samba is not specified.
     */

    public static final int B_NODE = 0;

    /**
     * A Point-to-Point node, or P node, unicasts queries to a nameserver
     * only. Natrually the <code>jcifs.netbios.nameserver</code> property must