150-130 · Question #109
OU need to improve redundancy in your LAN as well as increase bandwidth between switches using a Layer 2 protocol. Which feature will provide this?
The correct answer is B. LACP. See the full explanation below for the reasoning.
Question
OU need to improve redundancy in your LAN as well as increase bandwidth between switches using a Layer 2 protocol. Which feature will provide this?
Options
- ALLDP
- BLACP
- CVRRP
- DSSTP
How the community answered
(35 responses)- A6% (2)
- B80% (28)
- C11% (4)
- D3% (1)
Community Discussion
6
Yusuf A.Apr 29, 2026LACP (Link Aggregation Control Protocol) is the right pick here because it lets you bundle multiple physical links between switches into a single logical channel, which gets you both the extra bandwidth and the redundancy you need at Layer 2. The other options are off target, LLDP is just for discovery, VRRP handles gateway redundancy at Layer 3, and SSTP is a Microsoft tunneling protocol that has nothing to do with switch links.
Toby R.Apr 23, 2026LACP is exactly right, that one shows up on the exam pretty much word for word like this. It bundles multiple physical links into a single logical channel so you get both redundancy and more bandwidth between switches, all at Layer 2.
Brenda K.Apr 5, 2026B, LACP, and this one should cost you no more than 20 seconds flat. The keywords are doing all the work for you, "redundancy," "bandwidth," "Layer 2," that trio points straight to link aggregation and nothing else on that list comes close. LLDP is just a discovery protocol, VRRP handles gateway redundancy at Layer 3, and SSTP is a Windows tunneling protocol that has no business being on a switch. When I sat for mine I almost second-guessed myself because VRRP has the word "redundancy" in its name too, but I caught it fast because VRRP is not a Layer 2 feature and the question was explicit about that. Banked the time, moved on, never looked back. Flag it only if you blanked on what LACP stands for, otherwise answer and go.
Yusuf A.Apr 6, 2026Solid breakdown, and the VRRP trap is real, though I would add that remembering LACP lives inside 802.3ad helps too because once you tie the acronym to that standard it stops feeling like a guess and starts feeling like a fact.
Prof. SaraApr 16, 2026I initially leaned toward VRRP because "redundancy" jumped off the page at me. What corrected my thinking was going back to the two-part requirement, Layer 2 protocol plus increased bandwidth between switches, because VRRP is a Layer 3 gateway failover tool that does nothing for inter-switch throughput, while LACP bundles multiple physical links into one logical channel and satisfies both conditions at once.
Toby R.Apr 17, 2026LACP is the right call, though worth noting it is technically defined in IEEE 802.3ad (later absorbed into 802.3-2005) so on the exam if they show you the standard number that is another way to confirm you are looking at the link aggregation answer and not a distractor.