How do ACLs differ in various network devices such as routers, switches, and firewalls, and how do you adapt your implementation strategies to cater to these differences?

ACLs in routers primarily filter traffic based on IP addresses and protocols, while switches use ACLs to filter at the MAC address level. Firewalls utilize more advanced filtering techniques, including stateful inspection and application-layer filtering.

To adapt implementation strategies :

1. For routers, focus on controlling traffic flow between subnets using standard or extended ACLs.
2. In switches, implement VLAN-based ACLs (VACLs) or port-based ACLs (PACLs) for granular control within a subnet.
3. With firewalls, leverage their advanced capabilities by creating rules that inspect packet content, track connections, and block specific applications.

Consider device-specific features and limitations when designing ACLs, such as hardware resources and processing capacity. Ensure proper placement of ACLs to minimize performance impact and maximize security effectiveness.