Cisco Certified Support Technician (CCST) NetworkingNetwork AccessMedium
A company requires a reliable and secure WAN connection between its main data center and a new branch office. The connection must support various types of traffic (voice, video, data) with different Quality of Service (QoS) requirements and should utilize a service provider's existing infrastructure. Which WAN technology is best suited for these needs?
- AISDN (Integrated Services Digital Network)
- BMPLS (Multiprotocol Label Switching)
- CFrame Relay
- DDial-up
Show answer & explanationAnswer & explanation
Correct answer: B. MPLS (Multiprotocol Label Switching)
MPLS is a high-performance, scalable WAN technology that can handle various traffic types with QoS requirements by using labels for forwarding. It is commonly implemented by service providers to offer secure and reliable connections between customer sites over their existing infrastructure.
Why the other options are wrong
- A. ISDN provides digital connectivity but is generally limited in bandwidth and largely deprecated for modern WAN solutions.
- C. Frame Relay is an older packet-switched technology, largely superseded by MPLS, and offers less flexibility and QoS capabilities compared to MPLS.
- D. Dial-up offers very low bandwidth and is not suitable for modern business needs with voice, video, and QoS.
Multiprotocol Label Switching (MPLS)
A high-performance, scalable WAN technology that speeds up network traffic flow by using labels to forward data packets, allowing for efficient routing, QoS, and VPN services over a service provider's network.
- Uses labels for efficient packet forwarding
- Supports QoS for different traffic types
- Scalable and flexible for various services (VPNs)
- Commonly offered by service providers
Memory trick: MPLS labels guide traffic with QoS.