CCNA 200-301
application signature - ✔️✔️With Network Based Application Recognition (NBAR), the
definition of a combination of matchable fields that identify as characteristics of a
specific application
access interface - ✔️✔️A LAN network design term that refers to a switch interface
connected to end-user devices
Access Control Entry (ACE) - ✔️✔️One line in an access control list (ACL)
access layer - ✔️✔️In a Campus LAN design, the switches that connect directly to end-
point devices
access link (WAN) - ✔️✔️A physical link between a service provider and its customer
access rate - ✔️✔️The speed at which bits are sent over an access link
accounting - ✔️✔️In security, the recording of access attempts
AAA - ✔️✔️Authentication, authorization and accounting
ACI - ✔️✔️Application Centric Infrastructure
ACL - ✔️✔️Access Control List
Active Directory - ✔️✔️A popular set of identity and directory services from Microsoft,
used in part to authenticate users
administrative distance - ✔️✔️In Cisco routers, a means for one router to choose
between multiple routes to reach the same subnet when those routes are learned by
different routing protocols.
agent - ✔️✔️Generally, an additional software process or component running in a
computing device for some specific purpose
agent-based architecture - ✔️✔️An architecture that uses a software agent inside the
device being managed
agentless architecture - ✔️✔️An architecture that does not need a software agent
,amplification attack - ✔️✔️A reflection attack that leverages a service on the reflector to
generate and reflect huge volumes of reply traffic to the victim
Ansible - ✔️✔️A popular configuration management application
Ansible inventory - ✔️✔️Device host names along with information about each device
Ansible playbook - ✔️✔️Files with actions and logic about what Ansible should do
AAA Server - ✔️✔️Server providing authentication, authorization and accounting
services
anti-replay - ✔️✔️Preventing a man in the middle from copying and later replaying the
packets sent by a legitimate user, for the purpose of appearing to be a legitimate user
antivirus - ✔️✔️Software that monitors files transferred by any means, to look for
content that can be used to place a virus into the computer
APIC - ✔️✔️Application Policy Infrastructure Controller
APIC-EM - ✔️✔️Application Policy Infrastructure Controller -Enterprise Module
Application Centric Infrastructure (ACI) - ✔️✔️Cisco's data center SDN solution
Application Policy Infrastructure Controller - Enterprise Module (APIC-EM) - ✔️✔️The
software that plays the role of controller in an enterprise network of Cisco devices
application programming interface (API) - ✔️✔️A software mechanism that enables
software components to communicate with each other
Application Visibility and Control (AVC) - ✔️✔️A firewall device with advance features
(IPS, malware detection, VPN termination, etc.)
application-specific integrated circuit (ASIC) - ✔️✔️An integrated circuit (chip) designed
for a specific purpose of application.
AR - ✔️✔️Access Rate
ARP - ✔️✔️Address Resolution Protocol. An internet protocol used to map an IP
address to a MAC address
ARP ACL - ✔️✔️A configuration feature on Cisco LAN switches that define MAC and
IP that will be filtered
,ARP Reply - ✔️✔️An ARP message used to supply information about an ARP request.
A device providing its MAC address in reply to a request
ARP Request - ✔️✔️An ARP message used to request information from another host
located on the same subnet or broadcast domain
ASAv - ✔️✔️A Cisco ASA firewall software image that runs as a virtual machine rather
than on hardware
ASIC - ✔️✔️Application Specific Integrated Circuit
authentication - ✔️✔️In security, the verification of the identity of a person, device or
process
Authoritative DNS server - ✔️✔️The DNS server with the record that lists the address
that corresponds to a domain name (A Record) for that domain
authorization - ✔️✔️In security, the determination of the rights allowed for a particular
user or device
autonomous system (AS) - ✔️✔️An internetwork that is managed by one organization
autonomous system number (ASN) - ✔️✔️A number used by BGP to identify a routing
domain, often a single enterprise or organization.
AutoQoS - ✔️✔️In Cisco switches and routers, an IOS feature that configures a variety
of QoS features with useful settings as defined by design guides
bandwidth - ✔️✔️The speed at which bits can be sent and received over a link
bandwidth profile - ✔️✔️In MetroEthernet, a contractual definition of the amount of
traffic that the customer can send into the service and receive out of the service
Brownfield - ✔️✔️A term that refers to the choice to add new configuration to hardware
and software that are already in use, rather than adding new hardware and software
specifically for a new project
brute-force attack - ✔️✔️An attack where a malicious user runs software that tries
every possible combination of letters, numbers and special characters to guess a user's
password
, buffer overflow attack - ✔️✔️An attack meant to exploit a vulnerability in processing
inbound traffic such that the target system's buffers overflow, the target system can end
up crashing or inadvertently running malicious code injected by the attacker
cable internet - ✔️✔️An internet access technology that uses a cable TV (CATV),
normally used for video, to send and receive data
cacheable - ✔️✔️For resources that might be repeatedly requested over time, an
attribute that means that the requesting host can keep in storage (cache) a copy of the
resource for a specified amount of time
carrier Ethernet - ✔️✔️A WAN service that uses Ethernet links as the access link
between the customer and the service provider
CDP - ✔️✔️Cisco Discrovery Protocol. A media- and protocol-independent device-
discovery protocol that runs on most Cisco-manufactured equipment, including routers,
access servers, and switches. Using CDP, a device can advertise its existence to other
devices and receive information about other devices on the same LAN or on the remote
side of a WAN
CDP neighbor - ✔️✔️A device on the other end of some communications cable that is
advertising CDP updates
central office (CO) - ✔️✔️A term used by telcos to refer to a building that holds
switching equipment, into which the telco's cable plant runs so that the telco has cabling
from each home and business into the building
centralized control plane - ✔️✔️An approach to architecting network protocols and
products that places the control plane functions into a centralized function rather than
distributing the function across the networking device
Chef - ✔️✔️A popular configuration management application, which uses a server and
a pull model with in-device agents
Chef client - ✔️✔️Any device whose configuration is being managed by Chef
Chef Cookbook - ✔️✔️A set of recipes about the same kinds of work, grouped together
for easier management and sharing
Cisco Access Control Server (ACS) - ✔️✔️A legacy Cisco product that acts as a AAA
Server
Cisco AnyConnect Secure Mobility Client - ✔️✔️Cisco software product used as client
software on user devices to create a VPN
application signature - ✔️✔️With Network Based Application Recognition (NBAR), the
definition of a combination of matchable fields that identify as characteristics of a
specific application
access interface - ✔️✔️A LAN network design term that refers to a switch interface
connected to end-user devices
Access Control Entry (ACE) - ✔️✔️One line in an access control list (ACL)
access layer - ✔️✔️In a Campus LAN design, the switches that connect directly to end-
point devices
access link (WAN) - ✔️✔️A physical link between a service provider and its customer
access rate - ✔️✔️The speed at which bits are sent over an access link
accounting - ✔️✔️In security, the recording of access attempts
AAA - ✔️✔️Authentication, authorization and accounting
ACI - ✔️✔️Application Centric Infrastructure
ACL - ✔️✔️Access Control List
Active Directory - ✔️✔️A popular set of identity and directory services from Microsoft,
used in part to authenticate users
administrative distance - ✔️✔️In Cisco routers, a means for one router to choose
between multiple routes to reach the same subnet when those routes are learned by
different routing protocols.
agent - ✔️✔️Generally, an additional software process or component running in a
computing device for some specific purpose
agent-based architecture - ✔️✔️An architecture that uses a software agent inside the
device being managed
agentless architecture - ✔️✔️An architecture that does not need a software agent
,amplification attack - ✔️✔️A reflection attack that leverages a service on the reflector to
generate and reflect huge volumes of reply traffic to the victim
Ansible - ✔️✔️A popular configuration management application
Ansible inventory - ✔️✔️Device host names along with information about each device
Ansible playbook - ✔️✔️Files with actions and logic about what Ansible should do
AAA Server - ✔️✔️Server providing authentication, authorization and accounting
services
anti-replay - ✔️✔️Preventing a man in the middle from copying and later replaying the
packets sent by a legitimate user, for the purpose of appearing to be a legitimate user
antivirus - ✔️✔️Software that monitors files transferred by any means, to look for
content that can be used to place a virus into the computer
APIC - ✔️✔️Application Policy Infrastructure Controller
APIC-EM - ✔️✔️Application Policy Infrastructure Controller -Enterprise Module
Application Centric Infrastructure (ACI) - ✔️✔️Cisco's data center SDN solution
Application Policy Infrastructure Controller - Enterprise Module (APIC-EM) - ✔️✔️The
software that plays the role of controller in an enterprise network of Cisco devices
application programming interface (API) - ✔️✔️A software mechanism that enables
software components to communicate with each other
Application Visibility and Control (AVC) - ✔️✔️A firewall device with advance features
(IPS, malware detection, VPN termination, etc.)
application-specific integrated circuit (ASIC) - ✔️✔️An integrated circuit (chip) designed
for a specific purpose of application.
AR - ✔️✔️Access Rate
ARP - ✔️✔️Address Resolution Protocol. An internet protocol used to map an IP
address to a MAC address
ARP ACL - ✔️✔️A configuration feature on Cisco LAN switches that define MAC and
IP that will be filtered
,ARP Reply - ✔️✔️An ARP message used to supply information about an ARP request.
A device providing its MAC address in reply to a request
ARP Request - ✔️✔️An ARP message used to request information from another host
located on the same subnet or broadcast domain
ASAv - ✔️✔️A Cisco ASA firewall software image that runs as a virtual machine rather
than on hardware
ASIC - ✔️✔️Application Specific Integrated Circuit
authentication - ✔️✔️In security, the verification of the identity of a person, device or
process
Authoritative DNS server - ✔️✔️The DNS server with the record that lists the address
that corresponds to a domain name (A Record) for that domain
authorization - ✔️✔️In security, the determination of the rights allowed for a particular
user or device
autonomous system (AS) - ✔️✔️An internetwork that is managed by one organization
autonomous system number (ASN) - ✔️✔️A number used by BGP to identify a routing
domain, often a single enterprise or organization.
AutoQoS - ✔️✔️In Cisco switches and routers, an IOS feature that configures a variety
of QoS features with useful settings as defined by design guides
bandwidth - ✔️✔️The speed at which bits can be sent and received over a link
bandwidth profile - ✔️✔️In MetroEthernet, a contractual definition of the amount of
traffic that the customer can send into the service and receive out of the service
Brownfield - ✔️✔️A term that refers to the choice to add new configuration to hardware
and software that are already in use, rather than adding new hardware and software
specifically for a new project
brute-force attack - ✔️✔️An attack where a malicious user runs software that tries
every possible combination of letters, numbers and special characters to guess a user's
password
, buffer overflow attack - ✔️✔️An attack meant to exploit a vulnerability in processing
inbound traffic such that the target system's buffers overflow, the target system can end
up crashing or inadvertently running malicious code injected by the attacker
cable internet - ✔️✔️An internet access technology that uses a cable TV (CATV),
normally used for video, to send and receive data
cacheable - ✔️✔️For resources that might be repeatedly requested over time, an
attribute that means that the requesting host can keep in storage (cache) a copy of the
resource for a specified amount of time
carrier Ethernet - ✔️✔️A WAN service that uses Ethernet links as the access link
between the customer and the service provider
CDP - ✔️✔️Cisco Discrovery Protocol. A media- and protocol-independent device-
discovery protocol that runs on most Cisco-manufactured equipment, including routers,
access servers, and switches. Using CDP, a device can advertise its existence to other
devices and receive information about other devices on the same LAN or on the remote
side of a WAN
CDP neighbor - ✔️✔️A device on the other end of some communications cable that is
advertising CDP updates
central office (CO) - ✔️✔️A term used by telcos to refer to a building that holds
switching equipment, into which the telco's cable plant runs so that the telco has cabling
from each home and business into the building
centralized control plane - ✔️✔️An approach to architecting network protocols and
products that places the control plane functions into a centralized function rather than
distributing the function across the networking device
Chef - ✔️✔️A popular configuration management application, which uses a server and
a pull model with in-device agents
Chef client - ✔️✔️Any device whose configuration is being managed by Chef
Chef Cookbook - ✔️✔️A set of recipes about the same kinds of work, grouped together
for easier management and sharing
Cisco Access Control Server (ACS) - ✔️✔️A legacy Cisco product that acts as a AAA
Server
Cisco AnyConnect Secure Mobility Client - ✔️✔️Cisco software product used as client
software on user devices to create a VPN
