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n frame
Go-Back-N ARQ is a specific instance of the automatic repeat request (ARQ) protocol, in which the sending process continues to send a number of frames specified by a window size even without receiving an acknowledgement (ACK) packet from the receiver. It is a special case of the general sliding window protocol with the transmit window size of N and receive window size of 1. It can transmit N frames to the peer before requiring an ACK.
The receiver process keeps track of the sequence number of the next frame it expects to receive, and sends that number with every ACK it sends. The receiver will discard any frame that does not have the exact sequence number it expects (either a duplicate frame it already acknowledged, or an out-of-order frame it expects to receive later) and will resend an ACK for the last correct in-order frame. Once the sender has sent all of the frames in its window, it will detect that all of the frames since the first lost frame are outstanding, and will go back to the sequence number of the last ACK it received from the receiver process and fill its window starting with that frame and continue the process over again.
Go-Back-N ARQ is a more efficient use of a connection than Stop-and-wait ARQ, since unlike waiting for an acknowledgement for each packet, the connection is still being utilized as packets are being sent. In other words, during the time that would otherwise be spent waiting, more packets are being sent. However, this method also results in sending frames multiple times – if any frame was lost or damaged, or the ACK acknowledging them was lost or damaged, then that frame and all following frames in the window (even if they were received without error) will be re-sent. To avoid this, Selective Repeat ARQ can be used.
Bought these at the Albany Gun Show today thinking my 529 had a round butt but it's a square butt. The all rubber ones are brand new and the rubber/wooden set appears new but doesn't have packaging. $25 for the all rubber and $55 for the presentation type set. Would gladly trade for a nice set...
I am looking for a set of grips that cover the back strap on my older S&W 29 in 44Mag. I replaced the old worn Hogue grips with new ones and even the new ones are junk, they flex under recoil and pinch the S out of my palm. So, wanting grips that completely cover the back strap, I have larger...
New old stock in package.
VZ GRIPS - Model 320. Screw included.
Black Cherry.
Model NF-320-C-RB
Made of G10
Fit RB Smith & Wesson N-Frame revolvers.
Local sales only.
No interest in shipping.
$50 OBO
Possible trades include pre-1965 U.S. silver coins or silver rounds/bars.
Please DM me with...
New old stock in box.
VZ model
320 grips for a Smith & Wesson N-frame round butt revolver.
Made of G10.
Color: Hyena Brown.
Model NF - 320 - HB - RB.
Made in USA.
Comes with screw.
Local sales only.
No interest in shipping.
Only trades of any interest are pre-1965 U.S. silver coins or...
WTS/WTT Altamont Roper Grips.
First set is a K/L (Round Frame) Roper set, Smooth, no pattern, high gloss. These fit pretty well and feel great in hand. See photos for condition and fit on a 686. New these are around $80 from Altamont. I'm asking $45 picked up in person.
Second set is a N...
CRIMSON TRACE LASER GRIPS - BNIB - LG-306 - S&W K, L, N FRAME, GOVERNOR REVOLVERS
PM only for communication please.
First one to post "I'll take it" in this thread gets the item. I have this cross posted and the same rule applies everywhere.
Asking questions will not cause me to hold this item...
Jay Scott pearlite magna grips - great condition. Minor scratches that are hard to see. These are made by Jay Scott with a black composite base between the pearlite and the frame for strength. Nice fit and finish.
$25 delivered.
This is stock photo of rubber Hogue monogrips. Mine are...
Please send me PM and
no need post in this thread
Like to purchase old school Bomar 1911 sight rail 5"
First pic is a 6” extend
2nd is the 5” rail that I need
Trade Items maybe
40 cal ammo and folding Money
All are for N frame square butt.
Set #1 - Altamont finger groove combats, nice condition, good fit. $65
Set #2 - Siles target style, great condition and fit. $70
Set #3 - Unknown brand, very shinny, fit acceptable, great condition. $40
Open to trades.
I will ship for $10 extra and payment...
Altamont G10 Smooth K/L frame. With new screw. looks like new / minor scuff marks. $40
Smith and Wesson factory grips from the 686 "3-5-7" Plus models. $50 each
(Made by Altamont for Smith, I removed these myself from new guns)
Hogue N frame Round Butt NEW in package. $20
Used Pachmayr K...