ISC2 CISSP (Certified Information Systems Security Professional)Communication and Network SecurityMedium
A financial institution is implementing a new trading platform that requires extremely low latency and deterministic packet delivery across its global network. The network team is evaluating a technology that can provide efficient forwarding decisions based on short, fixed-length labels rather than complex IP header lookups. Which networking technology is BEST suited for this requirement?
- ASoftware-Defined Networking (SDN)
- BEthernet over IP (EoIP)
- CMultiprotocol Label Switching (MPLS)
- DVirtual Local Area Network (VLAN)
Show answer & explanationAnswer & explanation
Correct answer: C. Multiprotocol Label Switching (MPLS)
MPLS is designed for high-performance packet forwarding by using short, fixed-length labels instead of traditional IP routing lookups. This significantly reduces latency and allows for traffic engineering, making it ideal for applications requiring deterministic delivery like financial trading platforms.
Why the other options are wrong
- A. SDN separates the control and data planes, offering flexibility and centralized management, but it's an architectural approach, not a direct packet forwarding technology for low latency.
- B. EoIP encapsulates Ethernet frames within IP packets, primarily for extending Layer 2 networks over Layer 3, and does not inherently provide low-latency, deterministic forwarding.
- D. VLANs are used for logical segmentation within a local area network, not for optimizing global wide-area network performance and latency.
Multiprotocol Label Switching (MPLS)
A routing technique in telecommunications networks that directs data from one network node to the next based on short path labels rather than long network addresses.
- Reduces latency by avoiding complex IP header lookups.
- Enables traffic engineering and quality of service (QoS).
- Often used in core networks of service providers and large enterprises.
Memory trick: MPLS: 'My Packet's Lightning Speed' for fast lane delivery.