Cisco IOS test aaa command

Security - MAC Authentication Bypass

Security - Network Access Control (NAC)


IEEE 802.1X is a standard for port-based Network Access Control (P-NAC). It is part of the IEEE 802.1 group of networking protocols and provides an [authentication](/aaa) mechanism to devices wishing to attach to a LAN or WLAN.

IEEE 802.1X defines the encapsulation of the Extensible Authentication Protocol (EAP) over IEEE 802, which is known as "EAP over LAN" or [EAPOL](/security-extensible-authentication-protocol-over-lan-eapol). EAPOL is used over a wired or wireless LAN to transport EAP packets between the supplicant (the end user's device trying to authenticate, such as a laptop or smartphone) and the authentication server, via an authenticator (an intermediate device, such as a switch or wireless access point).

The standard is often used in combination with other authentication protocols, like PEAP, TTLS, or TLS, and is commonly used to secure networks by restricting access to only those devices that can provide valid credentials, such as a username and password or a digital certificate.

Links:

https://networklessons.com/cisco/ccie-routing-switching/aaa-802-1x-authentication

https://networklessons.com/cisco/ccna-200-301/wireless-authentication-methods

https://networklessons.com/cisco/ccie-routing-switching/aaa-configuration-cisco-switch

Security - IEEE 802.1X

STP - Shortest Path Bridging (SPB)

STP - Topology Change Acknowledgement (TCA)

STP - bridge priority

STP - determining the blocked port using port ID

STP - port identification

STP - port roles

STP - port states

STP - what bridge ID does the MST region use

STP - what is a topology change

STP BPDU Filter

STP BPDU Guard

STP BPDU Types

STP BPDU destination MAC address

STP Cost Calculation Methods

STP Loop Guard

STP Max Age

STP Message Age

STP PortFast

STP Portfast Options

STP Root Bridge selection

STP Root Guard

STP Topology Change (TC) flag

STP Topology Change Timer

STP UDLD and Autonegotiation

STP UDLD

STP bridge priority values

STP changing link cost

STP configuring on EtherChannel

STP configuring portfast

STP contents of a BPDU

STP cost long mode

STP cost short mode

STP determining blocked port using cost

STP direct vs indirect link failure

STP fine tuning the spanning tree protocol

STP how a switch identifies a BPDU

STP how to find the root bridge

STP interface type

STP prio nbr value

STP topology change process

Security - 802.1x with WLC and AAA server

Security - Cisco AnyConnect Secure Mobility Client

Security - Cisco Secure Client

Security - Cisco VPN Client

Security - Cisco VPN client software

Security - Diffie-Hellman groups

Security - Extensible Authentication Protocol over LAN (EAPOL)

Security - GETVPN

Security - IOS Usernames and Passwords

Security - IPsec nonce

Security - Kerberos

Security - Next Generation Firewall

Security - Secure Unique Device Identifier (SUDI)

Security - WPA 4-way handshake

Security - WebVPN

Security - accessing VTY from another VRF

Security - assigning privilege levels, syntax and behavior

Security - bogons

Security - broadcast-multicast storm

Security - configuring TACACS from another VRF

Security - privilege levels and command output

Security - privilege levels and enable keyword

Security - public key exchange

Security - root CAs and private keys

Security - spoofing

Security - storm control algorithm

Security IKE policy hash command

Security Trusted Platform Module (TPM)

Security aaa new-model

Security authentication on VTY lines

Security keyrings

Segment Routing

Serial Interface default broadcast address

Session Border Controller

Session Initiation Protocol

Show open TCP-UDP ports on Cisco router

Spanning Tree Protocol (STP)

Spine and leaf architecture - connections to leaf switches

Spine and leaf architecture - connections to spine switches

Spine and leaf architecture - reducing latency

Split-horizon

StackWise Virtual

Stackwise election process

Stackwise user priority

Subscriber templating

Summarization

Supernetting

Switch configuring a routed port

Switch high availability options

Switch protected port limitations

Switch protected port

Switching - CEF

Switching - Media Access Control (MAC) addresses

Switching - Process switching

Switching - backplane

Switching - cut through

Security - IEEE 802.1X

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