Which of the following mechanisms or techniques can VRRP be combined with to monitor uplink connectivity? (Multiple choice)

Question

Options

• ABFD
• BInterface Track
• CNQA
• DNGA

• A
  100% (64)

Explanation

VRRP alone only detects local interface failures, so it relies on external mechanisms to detect uplink connectivity loss and trigger priority changes or failovers. BFD (A) provides sub-second failure detection and can be paired with VRRP so that a BFD session failure lowers the router's VRRP priority, triggering a switchover. Interface Track (B) is a built-in VRRP feature that monitors a specified uplink interface and decrements the VRRP priority if it goes down, natively causing the backup to take over. NQA (C) (Network Quality Analysis, a Huawei feature) runs active probes (e.g., ICMP, TCP) to test end-to-end reachability; binding an NQA result to VRRP lets even deeper network faults - not just local link failures - trigger a priority change.

Option D (NGA) is not a recognized standard networking mechanism for VRRP uplink monitoring; it does not exist as a defined protocol or feature in this context and appears to be a distractor or a typographical error in the answer key - the legitimate answers are A, B, and C.

Memory tip: Think "BIN" - BFD (speed), Interface Track (local link), NQA (end-to-end path) - three real tools that give VRRP "eyes" beyond its own interface. If you see an unfamiliar acronym like NGA alongside them, treat it as the odd one out.

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