TACACS+ (Terminal Access Controller Access Control System) is an enhancement to TACACS developed by Cisco. Which means TACACS+ is Cisco's proprietary protocol. TACACS+ is mainly used for device administration using ACS (Access Control Server). TACACS+ is used for the communication between the client and the Cisco ACS server. TACACS+ is a reliable protocol because it uses TCP port 49 for communication and the TACACS+ communication is encrypted means all the packets is encrypted. TACACS+ provides more control over accounting and authorization. TACACS+ combines authentication and authorization in one step. Remote Access Dial-In User Service (RADIUS) is the IEFT standard protocol. The RADIUS protocol is used for communication between any vendor (cisco or non-cisco) AAA client and ACS server. If you are using multiple vendors devices then you can use RADIUS. In RADIUS communication is faster but a bit less reliable uses UDP port 1645/1812 for authentication and 1646/1813 for accounting. In a single process authentication and authorization can be done. RADIUS key with MD5 is used to hide the user password. Free Tutorials Theories and Labs 1. Complete CCNA CCNP and CCIE 2. CCIE LABs 3. MPLS full course 4. DMVPN 5. QoS 6. IPSec Social media linkdin: twitter: Instagram: Facebook : #cisco #ciscogateway #cisconetworking #ciscosecure #ciscosecurity #ciscocertification #ciscopartners #ciscocert #ccna #ccnacertification #ccnatraining #networksecurity #bgproducts #networkengineer #networkadministration #ccie #ccna #ccnp #networkinfrastructure #internetprotocol