This Packet Tracer file is only a simple environment for you to "experience" using TFTP to recover Cisco IOS Image file, and to backup/restore configurations.
However, if you have access to physical real router/switch, especially when you are in a training course, do not waste your chance of practicing! Packet Tracer,as a simulator, is absolutely not comparable to real machines!
For example, it does not simulate all Cisco IOS behaviors. The following Packet Tracer screen captures shows many command option is still missing from the real Cisco 2960 switch.
[In Packet Tracer 5.0]
Cisco-Switch-2960>en
Cisco-Switch-2960#copy ?
running-config Copy from current system configuration
startup-config Copy from startup configuration
tftp: Copy from tftp: file system
Cisco-Switch-2960#copy tftp: ?
flash: Copy to flash: file system
running-config Copy configuration from system
startup-config Copy startup configuration from system
Cisco-Switch-2960#
[In real Cisco 2960 switch]
Cisco-Switch-2960#copy ?
/erase Erase destination file system.
/noverify Disable automatic image verification after copy
bs: Copy from bs: file system
cns: Copy from cns: file system
flash: Copy from flash: file system
ftp: Copy from ftp: file system
null: Copy from null: file system
nvram: Copy from nvram: file system
rcp: Copy from rcp: file system
running-config Copy from current system configuration
startup-config Copy from startup configuration
system: Copy from system: file system
tftp: Copy from tftp: file system
xmodem: Copy from xmodem: file system
ymodem: Copy from ymodem: file system
Cisco-Switch-2960#copy tftp: ?
flash: Copy to flash: file system
null: Copy to null: file system
nvram: Copy to nvram: file system
running-config Update (merge with) current system configuration
startup-config Copy to startup configuration
system: Copy to system: file system
Cisco-Switch-2960#
Repeat: simulator is not a replacement of real machine at all!
