In which way are EIGRP and OSPF similar?
In which way are EIGRP and OSPF similar?
EIGRP and OSPF are similar in that they both support MD5 authentication for routing updates. This security feature ensures that routing information exchanged between routers is verified and unaltered, which is essential for maintaining the integrity of the routing table. Other options, such as unequal-cost load balancing and autosummarization, are not implemented the same way in both protocols, and the two protocols have differing impacts on CPU usage, scalability, and network convergence times.
MD5 EIGRP https://networklessons.com/eigrp/how-to-configure-eigrp-authentication MD5 OSPF https://networklessons.com/ospf/how-to-configure-ospf-md5-authentication
https://community.fs.com/blog/eigrp-vs-ospf-differences.html
no MD5 on that page
use process of elimination
They both DONT support autosummarization in similar way
Correct = B. D is incorrect per: 'EIGRP vs OSPF: CPU Usage.OSPF maintains the complete information about the routers in its area. Each time there is a change within the area, all routers need to re-sync their database, which makes it more CPU intensive. EIGRP, on the other hand, has triggered and incremental updates and will not send all the information about the network rather just the information that has changed will be shared.'
B is correct
B is correct
100% D is the right answer. EIGRP supports MD5 but not for routing updates
OSPF is much more resource intensive, hence it was designed with areas to reduce the information needed to be processed.
"The IP Enhanced IGRP Route Authentication feature provides MD5 authentication of routing updates from the EIGRP routing protocol." https://www.cisco.com/c/en/us/td/docs/ios-xml/ios/iproute_eigrp/configuration/15-s/ire-15-s-book/ire-rte-auth.pdf