###Network Time Protocol Daemon###
Features:
 1. Time synchronization
 2. multiple sources
 3. Support symmetric keys for time sync with other, controlled(trusted), servers
 4. Multiple strate are supported in a hierarchy
  a. Strate range: 1(most accurate)- 16(least accurate)
Note: Most accurate means that the stratum level 1 sever has access to an external clock (GPS, radio, etc.)
 5. NTP will NOT set your system's clock if it is skewed (off) by 1000 or more seconds
 6. If '-g' invocation option is ued, '1000s' skew is overridden
 7. NTP is dynamic in it's calculations; alway adjusting the values surrounding target NTP services

Tasks:
 1. Explore configuration
  a. '/etc/ntpd.conf' - primary config file
 2. Start service
  a. 'service ntpd start'
 3. Query NTPD
  a. 'ntpq -np'
Note: Clocks labeled at: stratum 16 are considered unreliable
Note: NTP uses: UDP:123 for source and destination ports

 4. Sync Cisco Router
  a. 'sh ntp ass'
  b. 'ntp server 192.168.75.21'

 5. Sync Windows Server
  a. 'rdesktop -a 16 -f 192.168.0.75.105'

 6. Sync Debian Server with RedHat Server
Note: Configure NTP to sync with 3 or more clocks