[802.11ac] Netgear A6200 USB 無線網卡開箱評測

 去年八月我們曾經測試了全球第一款 802.11ac 的 Router - Netgear R6300 無線路由器,讓我們有機會體驗 802.11ac 所帶來的無線傳輸魅力。如今時間已過近半年,我們一直期待會有其他相關產品推出,無奈這期間在市場上似乎還未有 802.11ac 的終端商品出現。今有幸再度取得 Netgear 推出的 A6200 802.11ac USB 無線網卡,並搭配 Netgear R6300 無線路由器測試,讓我們有機會一窺 802.11ac 無線傳輸效能的極致表現。


這次拿到這款 Netgear A6200 測試網卡是 Netgear 所推出的第一款支援 802.11ac 標準的 USB 無線網路卡,應該也是國內第一款上市的 802.11ac 無線網卡,它同時支援 2.4GHz 和 5GHz 雙頻段,其中在 5GHz 頻段,它支援 2*2 的 802.11ac,因此其最高無線傳輸速率可達 867Mbps,而在 2.4GHz 頻段,它同樣支持 2*2 的 802.11n,因此其最高無線傳輸速率為 300Mbps。

開 箱
Netgear A6200 採用黑灰兩色搭配的外觀設計,棱角分明的機身,盡顯犀利時尚科技風采。機身側方及後方則是整齊排列三角散熱小孔,不僅達到散熱效果,更顯大方有型,機身設計 USB 接頭可以平行桌面或旋轉 90 度後接入筆記型電腦。
http://digiland.tw/uploads/54_a6200_05.jpg 

此外,若嫌網卡接在筆電影響鍵盤打字操作或覺得收訊不如預期時,透過原廠隨機提供外接 USB 延伸座,您可將 Netgear A6200 放置於適當位置以利您筆電的操作或求得更好的傳輸效果。
http://digiland.tw/uploads/54_a6200_01.jpg

Netgear A6200 不僅提供了近 Gigabit 等級的無線傳輸速率,還具備 WPS 功能,用戶無需記憶冗長的密碼,即可建立 WPA2 的安全網路連線,非常的方便。
http://digiland.tw/uploads/54_a6200_02.jpg

此外,Netgear A6200 的天線設計也別出心裁,上層黑色天線與底層灰色本體是可以 90 度或 180 度旋轉,以求最佳傳輸收訊效果。根據這幾天的測試下來,我發現旋轉 90 度呈十字架狀的收訊似乎有比較好的傳輸效果,擺在機房甚至具有辟邪鎮魔、預防當機之功效,您不妨試試。
http://digiland.tw/uploads/54_a6200_03.jpg

產品規格
. 標準協定: IEEE 802.11 b/g/n 2.4 GHz、
              IEEE 802.11 a/n/ac 5.0 GHz
. 界面: USB 2.0
. 尺寸: 95.3 x 31.4 x 14.3 mm
. 重量: 19.5g 

軟體界面
接下來我們就進行實機安裝使用,原廠提供的安裝程式會自動幫您安裝 NETGEAR A6200 Genie 管理界面,透過 NETGEAR Genie,可以協助您快速進行網路連線設定。這裡所搭配的無線路由器同樣是具備 802.11ac 規格的 Netgear R6300,當我們採用 5GHz 頻段完成無線網卡的連線設定時,NETGEAR Genie 視窗底下狀態列則會顯示目前無線網卡狀態,眼尖的你一定會看到 866.5Mbps。沒錯,目前連線速度是 866.5Mbps。
http://digiland.tw/uploads/54_a6200_genie_01.jpg

換成 Windows 內建無線網路連線狀態視窗,一樣顯示 866.5Mbps。
http://digiland.tw/uploads/54_a6200_net_status_01.jpg

效能測試
測試環境:
Server:QNAP TS-459 Pro+ 
Client:i7 2670QM / 8GB / 120GB SSD
這次測試我們設定的環境是以一台 NAS 當 Server,接於 Netgear R6300 的 LAN port,另一台 i7 等級的筆電外接 A6200 無線網卡當成 Client。為避免 USB 速度造成瓶頸,我們使用筆電上的 USB 3.0 port 來接 A6200 無線網卡,(雖說 A6200 為 USB 2.0 規格,我們希望以較高規格的界面以壓榨更多的效能),R6300 及 A6200 兩者之間的直線距離約五公尺(中間無明顯障礙物),同時測試了網芳傳檔及 iperf 傳輸效率,供大家參考。

網芳效能測試
網芳 5GB 檔案下載速度約 26MB/s
http://digiland.tw/uploads/54_a6200_download_01.jpg

網芳 5GB 檔案上傳速度約 20MB/s
http://digiland.tw/uploads/54_a6200_upload_01.jpg

iperf 效能測試
Client to Server : 217Mbps

> iperf -c 192.168.2.55 -w 128k -t 60 -P 5 ------------------------------------------------------------ Client connecting to 192.168.2.55, TCP port 5001 TCP window size: 128 KByte ------------------------------------------------------------ [180] local 192.168.2.160 port 51030 connected with 192.168.2.55 port 5001 [188] local 192.168.2.160 port 51031 connected with 192.168.2.55 port 5001 [156] local 192.168.2.160 port 51027 connected with 192.168.2.55 port 5001 [172] local 192.168.2.160 port 51029 connected with 192.168.2.55 port 5001 [164] local 192.168.2.160 port 51028 connected with 192.168.2.55 port 5001 [ ID] Interval Transfer Bandwidth [180] 0.0-60.1 sec 311 MBytes 43.5 Mbits/sec [188] 0.0-60.1 sec 311 MBytes 43.4 Mbits/sec [172] 0.0-60.1 sec 311 MBytes 43.4 Mbits/sec [156] 0.0-60.1 sec 311 MBytes 43.4 Mbits/sec [164] 0.0-60.1 sec 311 MBytes 43.4 Mbits/sec [SUM] 0.0-60.1 sec 1.52 GBytes 217 Mbits/sec


Server to Client : 220Mbps

> iperf -c 192.168.2.160 -w 128k -t 60 -P 5 ------------------------------------------------------------ Client connecting to 192.168.2.160, TCP port 5001 TCP window size: 256 KByte (WARNING: requested 128 KByte) ------------------------------------------------------------ [ 7] local 192.168.2.55 port 50225 connected with 192.168.2.160 port 5001 [ 6] local 192.168.2.55 port 50223 connected with 192.168.2.160 port 5001 [ 5] local 192.168.2.55 port 50224 connected with 192.168.2.160 port 5001 [ 8] local 192.168.2.55 port 50227 connected with 192.168.2.160 port 5001 [ 9] local 192.168.2.55 port 50226 connected with 192.168.2.160 port 5001 [ ID] Interval Transfer Bandwidth [ 7] 0.0-60.0 sec 327 MBytes 45.7 Mbits/sec [ 6] 0.0-60.0 sec 316 MBytes 44.2 Mbits/sec [ 9] 0.0-60.0 sec 300 MBytes 41.9 Mbits/sec [ 8] 0.0-60.0 sec 287 MBytes 40.1 Mbits/sec [ 5] 0.0-60.0 sec 341 MBytes 47.7 Mbits/sec [SUM] 0.0-60.0 sec 1.53 GBytes 220 Mbits/sec


測試心得
時間已進入 2013 年,十多年來無線網路技術在歷經 802.11b、802.11g 及 802.11n 時代之後,為了實現更高的可靠性、更長的傳輸距離和更大的覆蓋範圍,開始邁入 802.11ac 時代。Netgear 順應世代交替推出了第一款 ac 規格的 A6200 無線網卡,經過我們長時間的觀察及測試,實際傳輸速度雖然距離 Gigabit 等級的期待還有一段距離,不過這已經是凌駕現有 802.11n 產品等級的連線水準,對有意打造極致無線網路環境的玩家,Netgear R6300 及 A6200 是值得直接攻頂的組合。

延伸閱讀:
[簡易開箱] 802.11ac 極速無線初體驗 Netgear R6300

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