fat is unsecure ntfs is secure

The major diff. between FAT and NTFS is security, If you
have FAT partition then Security and Quota tap will not
available.
You can convert FAT to NTFS file system from convert command
in windows xp.

FAT has 2 types Fat16 and FAT 32. that is define the 
allocation of track and sector.  it is fix. but in ntfs we 
can allot the size of sector.

There are many ways you can hide your IP. by using a proxy 
or using (third party) program like smarthide.

Through group policy we can set the wallpaper for all users 
in doamin. Suppose if new user login at the first time they 
can also get same wallpaper and this is not allowed the 
change the wallpaper except system administrator.or we also 
need change registry value as follows :
In Regedit :

HKEY_USERS\.DEFAULT\Control Panel\Desktop-right side 
wallpaper (here assign name of the wallpaper)

1 First take a bootable OS cd insert into cd rom
2 set first bootable device as cdrom
3 select drive on which you want to install OS
4 select the File System 
5 It starts installing OS it may take 30 to 40 mins depend
on System configuration.

Some of the preliminary steps include the following:

Backing up system data.

Removing users and jobs from the system.

Storing to tape any system files that you wish to maintain.

Once you are ready to begin the installation proper, the 
following are required steps of the process:

Installing from the system load tape.

Restoring the FOS tape.

Restoring the SUBSYS tape.

Creating a customized system load tape.

Updating with the customized system load tape.

Restoring user files, if any.

Starting system for normal operation.

what is latest os of microsoft,how window vista differ from 
window xp

1. Vista has a bitlocker option but xp doest have it.
   bit locker:
       Bitlocker drive encryption,
       Bitlocker on volume
       Prevents hard drive from hackers

2. Vista has windows defender tool which prevents spyware 
and unwanted software installation, but xp doesnt has it

3. Windows Vista has Parental control Feature Windows XP 
has No Parental control Feature
- This option enables parents to restrict
Children’s which sites, games .software
to use & not

if you have one (DC)domain controller and anohter is(ADC) 
additonal domain controller,now as per your qusetion if DC 
is down and ADC power is on,it'll take control that time 
but on ADC you to create global catalog server.
ADC'll give 24 hrs services after that it won't.
before 24 hrs make this ADC as a DC.
for this you need to seize the FSMO roles.

netbios name is the network basic input and output servies 
it is just like DNS in 2000  and 2003 servers. it is used 
for hostname resolution in prewindows systems.

NETBIOS name its funactionality is similar to DNS in 
windows 2000/2003 server. The NETBIOS used in window NT 
server for name resolation like ip to name or vice versa.