The system hangs at boot time after starting NFS services.What is the most likely cause?（）

During system boot， the system hangs at LED 0C31. What is the first step the system administrator should take to correct the problem？（）

The ping loopback hangs with no output. Which of the following is the most likely cause？（）

During reboot， the system hangs with an LED 0554 message that means， "The boot device could not be opened or a read failed."  Which of the following recovery procedures should be taken （）

The system hangs at boot time after starting NFS services. What is the most likely cause？（） 

The ping loopback hangs with no output. Which of the following is the most likely cause？（）

The ping loopback hangs with no output.Which of the following is the most likely cause?（）

During reboot the system hangs with LED 0581 that indicates "Configuring TCP/IP." Which recovery procedures should be taken？（）

During reboot the system hangs with an LED 0554 message that means， "The boot device could not be opened or a read failed." What recovery procedures should be taken？（）

During system boot， the boot process hangs at LED 0551.  Which of the following is a likely cause（）