In the southbound protocol of the controller, the () protocol collects traffic performance data of ports, links, and tunnels (LSP) from PCC, including flow rate and bandwidth utilization, and…

Question

Options

• ABGP-LS
• BPCEP
• CSNMP
• DNetconf

• A
  7% (2)
• B
  11% (3)
• C
  79% (22)
• D
  4% (1)

Explanation

SNMP (Simple Network Management Protocol) is the correct southbound protocol because it is specifically designed for monitoring and collecting performance statistics from network devices - including port traffic rates, link bandwidth utilization, and tunnel (LSP) performance metrics, as well as quality detection data like latency and packet loss.

Why the distractors are wrong:

• BGP-LS (A) distributes network topology information (link state, nodes, prefixes) to the controller - it's about discovering the network map, not measuring traffic performance.
• PCEP (B) handles communication between a PCC and PCE for path computation requests - it's used to establish and modify LSPs, not to collect their performance statistics.
• Netconf (D) is a configuration management protocol used to push or pull device configurations - not designed for real-time performance data collection.

Memory tip: Think of SNMP as the controller's "traffic reporter" - if you need numbers (bandwidth %, flow rates, error counts), it's SNMP. The other three have specific jobs: BGP-LS = map the topology, PCEP = compute/control paths, Netconf = configure devices. SNMP is the odd one out that purely measures rather than discovers, computes, or configures.

No community discussion yet for this question.