It's not. It's beneficial for making sure that file creation and modification times are correct, but it's not required. NTP is also beneficial if Kerberos authentication is used for the NFS server. Kerberos uses a time-stamped ticket system; each ticket is only good for a specified time period, typically five minutes. Therefore, all machines involved need to have their clocks set to be approximately the same. NTP is beneficial for this as well, but again, it is not required, and can be accomplished in many other ways.
NTP(Network Time Protocol)
NTP is Network Time Protocol. NTP allows you to synchronize clocks between computers.
NTP is an acronym for Network Time Protocol. NTP is a network protocol for clock synchronization. It was developed before 1985 and is one of the oldest network protocols still being used.
NNTP · SIP · SSI · DNS · FTP · Gopher · HTTP · NFS · NTP · SMPP · SMTP · SNMP · Telnet ·
NTP servers are designed to synchronize the clocks of computers over a network. An NTP server is great in resolving matters when a deadline is involved.
NTP (Network Time Protocol)
NTP (Network Time Protocol) is a network protocol used to synchronize computers with a time server. The time server's job is to provide the correct time based on an atomic clock. NTP is useful in desktop computers, important in file or web servers, and vital in certain scientific applications.
Nucleoside triphosphate. Network Time Protocol Notice To Proceed
NTP (Network Time Protocol)
NFS stands for Network File System, so yes, it is.
NFS is an abbreviation for Network File System. It is an application which allows network users to access shared files on different computers.
One can learn more about Network Time Protocols from the user created Wikipedia which combines many peoples knowledge to let you research efficiently about NTP ports.