What is EIGRP? EIGRP is a Routing Protocol used for IP Networks. It is classless, Distance Vector & Hybrid type of Routing protocol. It was released in 1993.   Is EIGRP a Cisco proprietary protocol or open source protocol? EIGRP is partially open source routing protocol. It was a Cisco proprietary protocol till 2013. Then Cisco submitted a portion of EIGRP to the IETF for consideration as a potential standard. The entire protocol has not yet been accepted as a standard and remains proprietary to Cisco. Therefore, some portion of EIGRP is open standard & some portion of it is … Continue reading EIGRP Interview Questions & Answers