My grandfather gave me a Cisco 2500 series router and it looks like it predates Ethernet. How can I get this working? What are all these ports, what signals do they use,
Cisco 1801 Series 341-0135-02 8-Port 10/100 Integrated
5-4 The Router | Networking Essentials: Interconnecting the LANs | Pearson IT Certification
Is there any router port module of the Cisco Packet Tracer Router? - Network Engineering Stack Exchange