单选题What is the operating system do Juniper Networks MX Series routers use?（）A IOSB MX-OSC UNIXD Junos OS

A. ScreenOS

B. Solaris

C. FreeBSD

D. HP-UX

The kernel is the(66)of an operating system such as Windows98, Windows NT, Mac OS or Unix. The kernel provides basic services for the other parts of the operating system,(67)it possible for it to run several programs at once(multitasking), read and write files and connect to networks and peripherals. Applications and utility programs use the services provided by the kernel to provide practical business functionality.

In operating systems such as Windows or most versions of Unix, the kernel(68)everything except application and utility programs.

In microkernel operating systems such as Digital Unix and Apples forthcoming Mac OS Server, the kernel(69)supports only multitasking and memory management. Other services such as applications, utilities and the user interface support device drivers, API and graphics which all(70)outside the microkernel.

A．nucleus

B．center

C．core

D．heart

You have configured Junos Pulse on your Windows desktop and want to verify that the IPsec configuration policy is being pushed down to your workstation upon network authentication and login.Which utility program do you use to see this configuration and where do you find it?（）

A. the Pulse Diagnostics Tool in the "File" > "Tools" menu option in the Pulse GUI

B. the Pulse Diagnostics Tool in the "Start" > "All Programs" > "Juniper Networks" > "Junos Pulse" menu folder next to the Junos Pulse application

C. the Pulse Diagnostics Viewer, which you access by simultaneously pressing "Ctrl" and "F2"

D. the Pulse Diagnostics Viewer in the "File" > "Tools" menu option in the Pulse GUI

A. IOS

B. MX-OS

C. UNIX

D. Junos OS

A. IOS

B. MX-OS

C. UNIX

D. Junos OS

A. Checkpoint firewall

B. SRX Series device

C. DP sensor

D. MX Series device