The correct answer is B. Time-consuming configuration and maintenance .
In a traditional WAN architecture , configurations are typically performed manually on each device (router-by-router basis) . This leads to:
* Increased operational overhead
* Slower deployment times
* Higher chances of configuration inconsistency
* Difficult scalability
According to Cisco ENCOR (350-401) architecture principles, traditional WANs lack centralized orchestration, making configuration and maintenance time-consuming and complex .
In contrast, Cisco Catalyst SD-WAN introduces:
* Centralized management and control (via vManage, vSmart, vBond)
* Policy-based automation
* Zero-touch provisioning (ZTP)
* Simplified operations and faster deployment
Now, why the other options are incorrect:
* A. Centralized reachability, security, and application policies # This is a defining feature of Cisco SD-WAN , not traditional WAN.
* C. Low complexity and increased overall solution scale # SD-WAN is specifically designed to reduce complexity and improve scalability .
* D. Operates over DTLS/TLS-authenticated and secured tunnels # Cisco SD-WAN uses secure control connections (DTLS/TLS) , which is not a characteristic of traditional WAN .
Final Concept (ENCOR Exam Focus):
Traditional WAN = Manual, complex, time-consuming
Cisco SD-WAN = Centralized, automated, scalable, secure