CDP
Enhanced Interior Gateway Routing Protocol (EIGRP) was once as Cisco Propitiatory routing protocol for Cisco routers. However many routers that are not Cisco now support the use of EIGRP.
EIGRP
this is a cisco propreitory protocol is not available for rfc
IGRP is Interior Gateway Routing Protocol, enhanced by Cisco proprietary Enhanced IGRP.
it is a cisco propriatary routing protocol.
IGRP - Interior Gateway Routing Protocol EIGRP- Enhanced Interior Gateway Routing Protocol
The acronym EIGRP stands for Enhanced Internet Gateway Routing Protocol. The protocol is loosely based on the Interior Gateway Routing Protocol invented by Cisco.
EIGRP is a Cisco proprietary routing protocol and therefore can only be used with Cisco routers.You can do route redistribution on Cisco routers, this allows you to take routes from another routing protocol (such as OSPF or RIP) and place them into the EIGRP network that way downstream nodes can be informed of routes available.
Perhaps you mean the "passive-interface" command in Cisco routers; what this does is that no information related to the routing protocol will be sent through the specified interface. For example, the interface that connects your network to the ISP should not carry any routing protocol information, since the routing protocol is only useful within your company's network.
Open standard protocols: Rip or OSPF. They are not Cisco proprietary protocols.
Enhanced Interior Gateway Protocol It is a Cisco proprietary protocol. It uses bandwidth and delay by default to calculate the best path. It can also use load and delay, but these are usually not used. It is a distance vector routing protocol. It keeps a topology map, but it is only similar to the topology map of link state routing protocols.
The Cisco Certified Internwork Expert routing is a program to certify working with Cisco products. Cisco, Ine, and Bradreese are companies that perform CCIE routing.