ITNv7 Lesson 2 - Basic Switch and End Device Configuration

Cisco IOS

term that represents the operating systems used by Cisco networking devices

shell

portion of operating system that interacts with applications and the user

kernel

portion of operating system that interfaces directly with computer hardware

GUI

a user-friendly interface that provides an interaction between a user and an OS through a graphical environment

console

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

startup configuration

file that is stored in NVRAM and that contains the configuration that has been saved on a device to be used upon startup or reboot

running configuration

file that is stored in RAM and that contains the configuration that is being done on a device

Switch Virtual Interface (SVI)

a logical interface used to remotely manage a switch over an IPv4 network

SSH

a protocol to establish a remote secure CLI connection over the network

ping

command to verify connectivity between the source (the device where the command is issued) and the destination (IP address used as argument)

traceroute

command to check the path that a packet takes to reach a destination

ipconfig

Windows command that shows the IP configuration settings on a PC

DHCP

a protocol that dynamically leases IPv4 addresses to DHCP-enabled end devices

DNS

The service that translates URLs to IP addresses.

CLI

Allows the user to interact with the shell using text-based commands

telnet

an insecure, in-band method of remotely establishing a CLI session through a virtual interface.

User EXEC mode

User mode, limited to basic monitoring and commands used to view statistics; Level 0-1, ex. Router>

Privileged EXEC Mode

Privileged mode; provides access to higher configuration modes. Router#

Global configuration mode

Commands entered in this mode affect the entire system, Router(config)#

Virtual terminal (VTY)

enable remote access using telnet or SSH to a device

Random Access Memory (RAM)

Temporary memory a computer uses to store information while it is processing. Running-config

Non-Volatile Random Access Memory (NVRAM)

Provides permanent storage for the startup configuration file (startup-config). NVRAM is non-volatile and does not lose its contents when power is turned off.

IPv4 address

A 32-bit binary number assigned to a computer on a TCP /IP network.

IPv6 address

A 128 bit identification assigned to an interface on the IPv6 Internet

subnet mask

A 32-bit number assigned to each host for

dividing the 32-bit binary IP address into

network and node portions.