Synchronization of file updates in a local-area network environment cannot be accomplished by using which of the following? File locks Record locks Semaphores Security labels Solution d. Security labels Security labels deal with security and confidentiality of data, not with file updates. A security label is a designation assigned to a system resource such as a file, which cannot be changed except in emergency situations. File updates deal with the integrity of data. The unique concept of a local-area network (LAN) file is its capability to be shared among several users..