term that represents the operating systems used by Cisco networking devices
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shell
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portion of operating system that interacts with applications and the user
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kernel
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portion of operating system that interfaces directly with computer hardware
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GUI
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a user-friendly interface that provides an interaction between a user and an OS through a graphical environment. Can fail crash or not operate as specified.
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console
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a physical port of a Cisco device that provides access to the device via a dedicated management channel, also known as out-of-band access. (Blue cable for the internet).
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keyword
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parameter with a predefined value to be used by an IOS command
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argument
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parameter that has to be supplied by the user to an IOS command
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startup configuration
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file that is stored in NVRAM and that contains the configuration that HAS BEEN SAVED,meaning is already there, on a device to be used upon startup or reboot
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running configuration
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file that is stored in RAM and that contains the configuration that IS BEING DONE on a device
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SVI
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Switch Virtual Interface. Is a logical interface used to remotely manage a switch over an IPv4 network
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SSH
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a protocol to establish a remote secure CLI connection over the network
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ping
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command to verify connectivity between the source (the device where the command is issued) and the destination (IP address used as argument). Broadcasting!
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traceroute
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command to check the path that a packet takes to reach a destination. By informing of the layers it takes, something ping does not do.
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ipconfig
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Windows command that shows the IP configuration settings on a PC
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DHCP
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a protocol that automatically assigns a IPv4 addresses to DHCP-enabled end devices
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to copy an existing configuration into RAM
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Why would a technician enter the command copy startup-config running config? (This is the right answer because the technician wants to copy a previously saved config from NVRAM into RAM)
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Use DHCP to automatically assign addressess
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An IT technician has manually configured an IP address on a laptop for a new employee. Each tie the employee tries to connect to the LAN, the employee receives a duplicate IP address error message. What can the company do to prevent this situation form arising again? (DHCP will greatly eliminate the chance of duplicate IP address errors).
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Nothing must be done. Changes to the configuration on an IOS device take effect as soon as the command is typed correctly and the Enter key has been pressed.
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An administrator has just changed the IP address of an interface on an IOS device. What else must be done in order to apply those changes to the device?
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Which two statements are true regarding the user EXEC mode? (choose two).
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-The device prompt for this mode ends with the ">" symbol.
-Only some aspects of the router configuration can be viewed.
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The component of the operating software that provides the user interface is called the
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shell.
The shell interfaces with the users, allowing them to request specific tasks from the device
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Which two functions are provided to users by the context-sensitive help feature of the Cisco IOS CLI? (Choose two).
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-Providing an error message when a wrong command is submitted.
-Allowing the user to complete the remainder of an abbreviated command with the TAB key.
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Passwords can be used to restrict access to all or parts of the Cisco IOS. Select the modes and interfaces that can be protected with passwords. (Choose three).
