Which of the following WAN technologies are most commonly used in modern enterprise networks? (Select all that apply.)
Correct Answer: A,C
Detailed Explanation: Wide Area Network (WAN) technologies are used to connect geographically dispersed networks and branch offices to the central corporate network or the Internet. Over the years, technologies have evolved significantly, and some legacy methods have been largely replaced by more modern, scalable solutions. A. MPLS (Multiprotocol Label Switching): MPLS is widely adopted in modern enterprise WANs. It works by labeling packets and forwarding them along predetermined paths based on these labels rather than solely on long network addresses. MPLS supports traffic engineering, quality of service (QoS), and VPNs, making it a preferred choice for organizations requiring reliable, high-performance WAN connectivity. It allows multiple types of traffic (voice, video, data) to coexist on the same network while maintaining performance.
This CCNA practice question helps students prepare for Cisco networking certification exams by testing knowledge of network fundamentals, routing, switching, and network security concepts.