The most common technique for using an appropriate synchronization mechanism to serialize the accesses to prevent errors is to acquire a _______ on the shared file, ensuring that each process has appropriate access in turn.

Settings you can make on the computer to help manage how your children use the computer are called ________

Fill in the blank(s) with correct word

Log file analysis on a router reveals several unsuccessful telnet attempts to the virtual terminal (VTY) lines. Which of the following represents the BEST configuration used in order to prevent unauthorized remote access while maintaining secure availability for legitimate users?

A. Disable telnet access to the VTY lines, enable SHH access to the VTY lines with RSA encryption B. Disable both telnet and SSH access to the VTY lines, requiring users to log in using HTTP C. Disable telnet access to the VTY lines, enable SHH access to the VTY lines with PSK encryption D. Disable telnet access to the VTY lines, enable SSL access to the VTY lines with RSA encryption