telnet and http protocols are insecure, i.e., information is transmitted in plain text. They use TCP port numbers 23 and 80 respectively.
ssh and https are secure protocols, i.e., they carry information in encrypted form. They use TCP port numbers 22 and 443 respectively.
Authenticated Routing Protocol Updates:
Routing protocol authentication options for the most often used routing protocols such as EIGRP, OSPF, RIP and BGP are preferred due to reasons such as route manipulation or poisoning. There are two ways to do this:
The following security measures may be applied to Data Plane:
OSPF authentication can be enabling in two ways:
Types of Authentication : There are three different types of authentication available for OSPF version 2: