4 - Using the CLI Flashcards
CLI
Command-line interface. An interface that enables the user to interact with the operating system by entering commands and optional arguments.
configuration mode
configuration mode
A part of the Cisco IOS Software CLI in which the user can type configuration commands that are then added to the device’s currently used configuration file (running-config).
console port
console port
A physical socket on a router or switch to which a cable can be connected between a computer and the router/switch, for the purpose of allowing the computer to use a terminal emulator and use the CLI to configure, verify, and troubleshoot the router/switch.
enable mode
A part of the Cisco IOS CLI in which the user can use the most powerful and potentially disruptive commands on a router or switch, including the ability to then reach configuration mode and reconfigure the router.
IOS XE
A Cisco operating system (OS) with a modern Linux-based multitasking software architecture used as the OS for many enterprise-class LAN switch and router products.
IOS
IOS
International Organization for Standardization. An international organization that is responsible for a wide range of standards, including many standards relevant to networking. The ISO developed the OSI reference model, a popular networking reference model.
rollover cable
For connections to the RJ-45 console port rather than USB console port of a Cisco device, the type of cable used between the user PC and the console port. The UTP rollover cable uses a rollover pinout with eight pins, connecting pin 1 to pin 8, pin 2 to pin 7, and so on.
ROM
ROM
Read-only memory. A type of nonvolatile memory that can be read but not written to by the microprocessor.
running-config file
running-config file
In Cisco IOS switches and routers, the name of the file that** resides in RAM**, holding the device’s currently used configuration.
Secure Shell (SSH)
Secure Shell (SSH)
A TCP/IP application layer protocol that supports terminal emulation between a client and server, using dynamic key exchange and encryption to keep the communications private.
startup-config file
startup-config file
In Cisco IOS switches and routers, the name of the file that resides in NVRAM memory, holding the device’s configuration that will be loaded into RAM as the running-config file when the device is next reloaded or powered on.
Telnet
Telnet
The standard terminal-emulation application layer protocol in the TCP/IP protocol stack. Telnet is used for remote terminal connection, enabling users to log in to remote systems and use resources as if they were connected to a local system. Telnet is defined in RFC 854.
user mode
user mode
A mode of the user interface to a router or switch in which the user can type only nondisruptive EXEC commands, generally just to look at the current status, but not to change any operational settings.