– In the interest of conserving local router resources and alleviating network load, EIGRP supports stub routing. A stub router is a router that should not be used as a transit router, meaning that the stub router does not have any information about other EIGRP routers behind it and does not need to advertise anything other than locally connected and summary routes to its neighbours.

– Simple Network Management Protocol version 3 introduces much needed security features to the SNMP protocol, SNMPv1 and v2c do not support authentication or encryption of SNMP data. SNMPv3 introduces authentication based on the HMAC-MD5 and HMAC-SHA algorithms, and encryption using AES algorithms (weaker algorithms are also supported).