1Y0-351 · Question #203
What does the TCP Buffering feature on the NetScaler accomplish?
The correct answer is D. It offloads the server response to the NetScaler before delivering it to the client. See the full explanation below for the reasoning.
Question
What does the TCP Buffering feature on the NetScaler accomplish?
Options
- AIt enables the TCP options field syn-cookie.
- BIt optimizes the client and server TCP window size.
- CIt buffers incoming client connections on the NetScaler.
- DIt offloads the server response to the NetScaler before delivering it to the client.
How the community answered
(19 responses)- A16% (3)
- B5% (1)
- C5% (1)
- D74% (14)
Community Discussion
6
Nina C.May 16, 2026The correct answer is D. TCP Buffering on the NetScaler works by pulling the full server response down to the appliance first, so the server can close its connection right away instead of sitting there waiting on a slow client to receive the data piece by piece. That frees up server resources much faster, which is the whole point, since the NetScaler then handles drip-feeding the response to the client at whatever pace the client can handle. Options A and B describe separate TCP features (SYN cookies and window size tuning), and C has the direction wrong, because it is the server side being offloaded here, not the incoming client connections being buffered.
Giselle K.Jun 1, 2026TCP Buffering is all about offloading the server-side response to the NetScaler so the backend gets freed up fast, regardless of how slow the client connection is. The server dumps the full response to the NetScaler, closes its connection, and the NetScaler handles the slow drip to the client, which directly reduces server-side TCP connections held open waiting on sluggish clients.
Ingrid P.May 19, 2026I had this one on my exam and almost clicked C because "buffering" made me think of holding client connections, but then I remembered that TCP Buffering is really about the NetScaler pulling the full server response before trickling it out to slow clients, which frees the server immediately. The key is that it offloads the server, not the client side, so D is the one you want.
Nina C.May 21, 2026That server-side framing is exactly what locked it in for me too, and I would just add that it helps to keep TCP Buffering separate from TCP Multiplexing in your head, since Multiplexing is about reusing server-side connections while Buffering is about holding the response after the server is already done and gone.
Mei-Ling H.May 30, 2026D is correct, and the word "offloads" is the key here. TCP Buffering means the NetScaler receives the full server response, frees the server connection early, and then delivers that buffered data to the slow or variable-speed client on its own schedule, so the server is not held waiting. Option C looks attractive because "buffers incoming client connections" sounds like what a load balancer does, but that describes surge protection or connection queuing, not this specific feature. Option B is also tempting because TCP window size is a real TCP concept, but tuning window size falls under TCP optimization profiles, not TCP Buffering. The exam is testing whether you know that TCP Buffering is specifically about absorbing the server-side response on the appliance, and D captures that exactly.
Nina C.Jun 2, 2026Good breakdown, and the direction thing is what finally made C click as wrong for me too, because it is describing the client side of the handoff when TCP Buffering is specifically about what happens on the server side of the appliance.