While troubleshooting a connectivity problem on the network, you issue the ping command from your PC command prompt, but the output shows "request times out."At which OSI layer is this problem associated with?（）
第1题：
While troubleshooting a network connectivity problem, a technician observes steady link lights on both the workstation NIC and the switch port to which the workstation is connected. However, when the ping command is issued from the workstation, the output message "Request timed out." is displayed. At which layer of the OSI model does the problem most likely exist（）。
第2题：
While troubleshooting a video problem on an application server, the system administrator has determined that the video firmware should be updated. Which of the following sources should be used to locate an appropriate update for this hardware?（）
第3题：
While troubleshooting a network problem,a technician discovers that the current copy of the Cisco IOS is outdated and needs to be updated.Which of the following commands would the technician issue to replace the Cisco router IOS with the newer version?（）
第4题：
client network configuration
VLAN mapping
routing protocols
first-hop redundancy protocol
第5题：
Your network contains a server named Server1 that runs Windows Server 2008 R2.You discover that the server unexpectedly shut down several times during the past week.You need to identify what caused the shutdowns and which software was recently installed. What should you click from Action Center？（）
第6题：
An administrator has ordered a new server and setup a dedicated RAID 1 array for the application database. While troubleshooting with performance monitoring tools， the administrator is receiving lowerread/write speeds than expected. Which of the following would be the MOST likely cause for the lower performance？（）
第7题：
An administrator logs into a server and notices slow performance.While troubleshooting the problem the administrator notices that an unfamiliar process in the Task Manager is running at 100% CPU usage.The administrator tries to end the task and receives ‘Access is denied’. Which of the following steps would allow the administrator to terminate that process？（）
第8题：
While troubleshooting a network， you need to verify the liveness of hosts in the subnet 192.168.1.64/26. All of the hosts are able to reply to ping requests. How would you confirm the existing nodes using one single command？（）
第9题：
The port is experiencing errors.
The port is administratively disabled.
The port is blocked by spanning tree.
The port has an active link with normal traffic activity.
第10题：
start the system in DOS Mode and run the WIN /S command
press the
start the system in DOS Mode and run the safe.EXE file
hold