多项选择题
A. Make sure that the network server can be accessed.
B. Check that the authentication for access is set.
C. Assure that the network server has adequate space for the code image.
D. Verify any file naming and path requirements.
E. Make sure that the server can load and run the bootstrap code.
单项选择题 You wish to upgrade the IOS of a router without removing the image currently installed.What command will display the amount of memory that is being used by the current IOS image and whether there is enough room available to hold both the current and new images?（）
多项选择题 After logging into the RtrB router, you issue the "show interface" command as displayed below: After considering the effects of the command output illustrated in the exhibit above,which of the following protocols are operational on the serial link?（）
多项选择题 What kind of information can you deduce from an IOS image file name?（）