ccna on macbook

ccna on macbook.TACACS+ Protocol RADIUS ProtocolUse TCP with port 49 for more reliable network transmission Use UDP with port 1812 (authentication) and 1813 (billing) for more efficient network transmissionExcept for TACACS+ packet header, all packet body is encrypted Only the password field in the authentication packet is encryptedProtocol is more complex, authentication and authorization are separated, so that authentication and authorization services can be implemented on separate security servers Protocol is simpler, authentication and authorization are combinedSupports authorized use of the device's configuration commands. Each command entered by a user at a certain level needs to be authorized by the TACACS+ server, and if the authorization is passed, the command can be executed. Commands20.2.2 Introduction to IEEE 802.1XThe IEEE IEEE 802.lx (also known as Dotlx) standard defines a port-based access control and authentication protocol that restricts unauthorized clients from connecting to the network through a switch port. Before using a switch port, an authentication server authenticates each client connected to the switch port. Until authentication is passed, IEEE 802.1X allows only EAPoL (Extensible Authentication Protocol over LAN) data to pass through the switch port to which the host is connected; after authentication is passed, the client can use the switch port normally. IEEE802.lx authentication system adopts typical Client/Server architecture, including 3 parts: Client > Device and Authentication Server. o IEEE802.lx system supports EAP relay method and EAP termination method to interact with remote RADIUS server to complete authentication. Assuming that the client initiates authentication, the following is an example of the EAP-MD5 relay method to explain the authentication process of the IEEE802.lx.Client Alkaline Authentication ServerEAP0L EAP0REAPOL-Start