- TCP/UDP port 53.
- Issue the acces-list x deny eigrp any any command.
- EIGRP: Interface mode authentication; and OSPF: authentication under router OSPF and under interface configuration.
- From the show version command (see below).
- Both types of links.
- Use the virtual-link command (this is not in the CCNA syallbus but I thought I’d add it just in case).
The content below this message is for members only.
