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Operating Cisco LAN Switches
Cisco 2960 switches - how to gain access to the command-line interface (CLI) from which you can issue commands to the switch and how to tell the switch different operational parameters using the CLI (
15
Computer Networking
Not Applicable
04/09/2011
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Term
CLI (acronym)
 Definition
Command Line Interface
Term
Command Line Interface
 Definition
An interface that enables the user to interact with the operating system by entering commands and optional arguments.
Term
SSH (acronym)
 Definition
Secure Shell
Term
Secure Shell
 Definition
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.
Term
Enable Mode
 Definition
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.
Term
User Mode
 Definition
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.
Term
Configuration Mode
 Definition
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).
Term
startup-config file
 Definition
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.
Term
running-config file
 Definition
In Cisco IOS switches and routers, the name of the file that resides in RAM memory, holding the device’s currently used configuration.
Term
Telnet
 Definition
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.
Term
IOS (acronym)
 Definition
Internetwork Operating System
Term
Internetwork Operating System
 Definition
Cisco operating system software that provides the majority of a router’s or switch’s features, with the hardware providing the remaining features.
Term
Console line
 Definition
Cisco switches refer to the console as the console line – specifically console line 0.
Term
vty (acronym)
 Definition
Virtual Terminal Line
Term
Virtual Terminal Line
 Definition
Switches support 16 concurrent Telnet sessions which are called virtual terminal (vty) line. The term vty  refers to the old name for terminal emulators. This includes Telnet and SSH access.
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