從國外買MIKROTIK CCR1009-8G-1S-1S+PC

yuan0715 · 2015-11-06T04:12:34+08:00

最近覺得家裡網路很爛想換一台機器最後看上MIKROTIK CCR1009-8G-1S-1S+PC主要是因為搭靜音適合放在家http://routerboard.com/CCR1009-8G-1S-1SplusPC找了一下國外網站在www.wifi-stock.com上用歐元結帳比較划算這台賣339.9歐元DHL運費29歐元4%刷卡手續費14.52歐元總共377.42歐元約台幣 13424元比台灣或是中國買划算很多不知道這台機器或是賣家有什麼需要注意的地方嗎?至於保固我想應該用不到無所謂了 XD

pctine

5094分

101樓

pctine

個人積分：5094分

文章編號：58262863

Sabrina111185 wrote:
聽到許多前輩在說 pppoe offload, 請問這功能的作用是什麼? 有這功能的好處為何? 謝謝前輩的解惑....(恕刪)

這我也不了解, 不過問過 Mikrotik, 他們說他們家的產品沒有做這個功能.

FB: Pctine

chrisintaipei

79分

102樓

chrisintaipei

個人積分：79分

文章編號：58263278

Sabrina111185 wrote:
聽到許多前輩在說 pppoe offload, 請問這功能的作用是什麼? 有這功能的好處為何? 謝謝前輩的解惑.

我之前也很好奇，查到的是這樣。基本上是，不讓 router 來 split into separate packets.

https://en.wikipedia.org/wiki/Large_segment_offload

In computer networking, large segment offload (LSO) is a technique for increasing outbound throughput of high-bandwidth network connections by reducing CPU overhead. It works by queuing up large buffers and letting the network interface card (NIC) split them into separate packets. The technique is also called TCP segmentation offload (TSO) when applied to TCP, or generic segmentation offload (GSO).

For example, a unit of 64kB (65,536 bytes) of data is usually segmented to 46 segments of 1448 bytes each before it is sent through the NIC and over the network. With some intelligence in the NIC, the host CPU can hand over the 64 KB of data to the NIC in a single transmit-request, the NIC can break that data down into smaller segments of 1448 bytes, add the TCP, IP, and data link layer protocol headers - according to a template provided by the host's TCP/IP stack - to each segment, and send the resulting frames over the network. This significantly reduces the work done by the CPU. As of 2014 many new NICs on the market support TSO.