CHAPTER 2 Flashcards
Cisco Internetwork Operating System (IOS):
The collection of network operating systems used by Cisco networking devices.
Command-Line Interface (CLI):
A user interface that depends on textual commands being entered by the user. (Terminal)
Console:
Data transfer that requires the establishment of a virtual circuit.
Domain Name System (DNS):
An internet-wide system by which a hierarchical set of DNS servers collectively hold all the name-to-IP address mappings, and DNS servers refer users to the correct DNS server to successfully revolve a DNS name.
Dynamic Host Configuration Protocol (DHCP):
A protocol used to assign IP configuration to hosts.
Firmware:
Permanent software programmed into ROM memory.
Global Configuration Mode:
A mode used to configure global parameters or enter other configuration sub modes.
Graphical User Interface (GUI):
A user-friendly interface that uses graphical images and widgets to indicate the information and actions available to a user
IPv4 Address:
A 32-bit number written in dotted decimal notation
IPv6 Address:
A 128-bit address written in hexadecimal
Kernel:
The portion of the operating system that interacts directly with computer hardware.
Nonvolatile Random-Access Memory:
RAM that does not lose its contents when the device is powered off.
Ping:
A troubleshooting tool used to verify network connectivity by sending a packet to a specific IP address and waiting for the reply.
Privileged EXEC Mode:
An IOS administration level mode that supports access to configuration and management commands.
Random-Access Memory (RAM):
Memory that can have new data written to it and that can have stored data read from it.
Secure Shell (SSH):
A protocol that provides a secure remote connection to a host through a TCP application.
Shell:
The portion of the operating system that interfaces with applications and the user.
Subnet Mask:
A dotted decimal number that helps identify the structure of IPv4 addresses.
Switch Virtual Interface (SVI):
A virtual interface for which there is no associated physical hardware on the device.
Telnet:
A non-secure network service that supports CLI access to a remote host.
Traceroute:
A command that discovers the IP addresses and hostnames of the routers when sending a packet from one computer to another.
User EXEC Mode:
The limited CLI mode when the commands available to the user are a subset of those available at the privileged level.
Virtual Terminal (vty):
A text-based logical interface on an IOS device. It is accessed using Telnet or SSH to perform administrative tasks.
