SharePoint Farm BackUp

Config DB backup can be accomplish by two ways through PS as below:

 - Full Config Back up of DB:
    Backup-SPConfigurationDatabase -Directory -DatabaseServer  -DatabaseName -Verbose
 - Configuration details alone
    Backup-SPFarm -Directory \\file_server\share\Backup -BackupMethod full -ConfigurationOnly

Full Farm Backup

    Backup-SPFarm – Directory “\\server_name\Full_Farm_Backup” –backupmethod Full