Final answer:
The intermediary devices that can be used to implement security between networks are routers and firewalls. Routers control access using ACLs, while firewalls monitor and control network traffic with security rules.
Step-by-step explanation:
In the context of networking, when considering which intermediary devices can be used to implement security between networks, the correct options are:
- Router
- Firewall
Routers can be used to create and control access between networks. They can implement security by using Access Control Lists (ACLs) to permit or deny traffic based on IP address, protocol, ports, and more. Routers can act as a basic security measure by controlling the flow of traffic between networks.
Firewalls stand out as dedicated security devices designed to monitor and control incoming and outgoing network traffic based on predetermined security rules. They establish a barrier between trusted internal networks and untrusted external networks such as the internet.