Which three options are limiting factors of traditional networks in the new age of digitalization? (Choose three.)
- IP Access Lists
- VRFs
- VLANs
- VXLANs
- IP subnets
- LISPs
Explanation: Traditional networks rely on topology-based constructs that have become limiting factors in the face of modern digitalization requirements, such as host mobility and large-scale automation.
- VLANs: The sources explicitly state that VLANs are a limiting factor due to inefficient use of available network links, rigid requirements on device placements, and limited scalability (restricted to 4,094 IDs).
- IP subnets: Traditional segmentation is tied to the network topology, such as the IP subnet, which limits flexibility because policies are coupled to where a device is physically located in the network.
- IP Access Lists: In traditional designs, security policies leverage ACLs that are statically mapped to IP and MAC addresses. The sources note that it is challenging to track ACLs, VLANs, and IP addresses to ensure optimal policy and security compliance as the network grows.
In contrast, VXLAN and LISP are modern overlay technologies used in Cisco SD-Access to overcome these traditional limitations. While VRFs are used in traditional segmentation, the primary "topology-based" constraints highlighted as hurdles for digitalization are VLANs, subnets, and the resulting complexity of ACL management.
Related exam: Modules 23 – 26: Checkpoint Exam: Software-Defined Networking Answers (CCNP ENCOR v9)
