Managing A Cisco Internetwork MCQs with Explanations

Before you back up an IOS image to a laptop directly connected to a router's Ethernet port, make sure the TFTP server software is running on your laptop, that the Ethernet cable is a "crossover," and that the laptop is in the same subnet as the router's Ethernet port, and then you can use the copy flash tftp command from your laptop.

The show hosts command provides information on temporary DNS entries and permanent name-to-address mappings created using the ip host command.

The best answers, the ones you need to remember, are that either an access control list is filtering the Telnet session or the VTY password is not set on the remote device.

The tracert command is a Windows command and will not work on a router! A router uses the traceroute command.

To keep open one or more Telnet sessions, use the Ctrl+Shift+6 and then X keystroke combination.

To copy the IOS to a backup host, which is stored in flash memory by default, use the copy flash tftp command.

The command copy tftp flash will allow you to copy a new IOS into flash memory on your router.

The command traceroute (trace for short), which can be issued from user mode or privileged mode, is used to find the path a packet takes through an internetwork and will also show you where the packet stops because of an error on a router.

The default configuration setting of 0x2102 tells the router to look in NVRAM for the boot sequence.

Since the question never mentioned anything about a suspended session, you can assume that the Telnet session is still open, and you would just type exit to close the session.

The show version command provides you with the current configuration register setting.

All Cisco routers have a default configuration register setting of 0x2102 , which tells the router to load the IOS from flash memory and the configuration from NVRAM.

To see console messages through your Telnet session, you must enter the terminal monitor command.

The default configuration setting is 0x2102 , which tells the router to load the IOS from flash and the configuration from NVRAM. 0x2142 tells the router to bypass the configuration in NVRAM so that you can perform password recovery.

If you save a configuration and reload the router and it comes up either in setup mode or as a blank configuration, chances are you have the configuration register setting incorrect.

Before you start to configure the router, you should erase the NVRAM with the erase startup-config command and then reload the router using the reload command.

The best answer is show version , which shows you the IOS file running currently on your router. The show flash command shows you the contents of flash memory, not which file is running.

Although option A is certainly the "best" answer, unfortunately option D will work just fine and your boss would probably prefer you to use the show cdp neighbors detail command.

The show flash command will provide you with the current IOS name and size and the size of flash memory.

Since the configuration looks correct, you probably didn't screw up the copy job. However, when you perform a copy from a network host to a router, the interfaces are automatically shut down and need to be manually enabled with the no shutdown command.