NETWORK LAYER
UNICAST ROUTING
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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by encrypting all passwords passing through the router
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by encrypting passwords in the plain text configuration file
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by requiring entry of encrypted passwords for access to the device
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by configuring an MD5 encrypted key to be used by routing protocols to validate routing exchanges
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Detailed explanation-1: -The “service password-encryption” command allows you to encrypt all passwords on your router so they cannot be easily guessed from your running-config. This command uses a very weak encryption because the router has to be very quickly decode the passwords for its operation.
Detailed explanation-2: -Option-(2)-The password-encryption command encrypts the text-password into a cipher text which can not be read by attackers even after getting access to it as it can only be read by authorized users who possess encryption keys. Thus it enhances the security of cisco routers and switches hence it is the correct option.
Detailed explanation-3: -Explanation. To help for security and reduce password vulnerability, the command service password-encryption encrypts passwords so that they cannot be displayed in plain text in a printed version or backup copy of the configuration file.
Detailed explanation-4: -service password-encryption This command obscures all clear-text passwords in the configuration using a Vigenere cipher. You enable this feature from global configuration mode. Now a show run command no longer displays the password in humanly readable format.