Tu kiem tra toc do duong truyen tai gia

Thứ ba, 03 Tháng ba 2009, 08:49 GMT+7


Goi cuoc Internet ca nhan thong dung o Viet Nam la khoang tu 4-6Mbps, nhung trong hop dong hay ghi la "chia se", boi ho se khong cam ket voi chung ta la toc do duong truyen se la bao nhieu. Co truong hop cung la 5Mbps nhu nhau nhung toc do Internet moi nha moi khac. De danh gia duong truyen cua ban, chung toi xin goi den mot cong cu huu ich va mien phi MyConnection PC.

Trong qua trinh truyen du lieu Internet, thinh thoang mot so goi du lieu bi mat. Dieu nay lam cho cac game thu bi lag, mot chi tiet lag nho thoi cung du khien ho thua kem trong cac tro choi yeu cau thoi gian thuc. Con voi nhung nguoi download cac file lon thi thinh thoang lai thay tien trinh bong nhien that cham, va co khi la keo dai den vo han.

Khi ma duyet web thi thay kha nhanh, nhung den khi choi game online hoac download nhung file nang lai cam thay i ach thi tuc la chat luong duong truyen cua ban co van de. Vay ban hay dung MyConnection PC de danh gia lai chung.

Truoc day nguoi ta co the dung cac cong cu web nhu trang SpeedTest hoac BroadbandReports de test xem toc do duong truyen the nao. Nguyen tac chung cua nhung cong cu tren la no mieu ta toc do ket noi va truyen dan bang cach goi va nhan du lieu. Nhung MyConnection PC cung cap nhieu thong tin hon, va cho phep di sau vao nhung bai test chuyen biet.

Cac ban co the tai ve MyConnection PC mien phi tai day (1,3 Mb), chuong trinh chay tren Windows 2000, XP va Vista. Phien ban mien phi chi cho phep cong cu test toc do down va up, va cho xai thu cong cu test Capacity Speed. Phien ban "Advandced" hoac "Business" ban phai ton tu 30$ den 200$ de co nhung cong cu chuyen dung hon.

Neu ban khong phai nha cung cap dich vu, hoac dang khao sat duong truyen 1 cach chuyen nghiep thi phien ban mien phi da la qua du.

Nao bat dau khao sat!

Chay chuong trinh lan dau se hien mot "cai banh", do nhu la cai menu de lua chon vay. Ban hay an vao nut Application Speed o menu ben trai.

Anh minh hoa


An vao Run Application Speed, bai test ton chua den 1 phut.
Co 2 che do xem do thi la Classic View va Graph.

Anh minh hoa


Che do xem Classic View

Vi du voi che do xem Classic View nhu hinh tren thi MyConnection PC cho biet toc do download-upload cua duong truyen nha toi tuong ung la 854- 433 Kbps (KB/giay). No con uoc luong cho toi biet la 1Mb tai trong 10s; 10 Mb tai trong 2 phut; 100 Mb tai trong 16 phut, 1 CD tai trong 1,6 gio..v.v..

Toi chua tin tuong cho lam nen thu vao trang Skydrive tai 2,5 Mb thi ton 20s. Roi vao trang Mediafire tai thu bo cai dat cua trinh nghe nhac Songbird (toi cat tren trang do) khoang 11,75 Mb thi tai trong 1 phut 50s.

Vi may tinh toi cai phan mem ho tro tai IDM nen toc do co nhanh hon mot chut so voi su uoc luong cua MyConnection. Nhung qua day cho thay su tinh toan cua MyConnection kha chinh xac.

Nhung so lieu no cung cap cho ta mot su uoc luong ve thoi gian, cung nhu khao sat tinh trang duong truyen luc do de ta co the quyet dinh xem co nen download du lieu hay khong.

Nhung "xa xoi cach tro" khien cho cac goi du lieu bi mat mat la dieu binh thuong. Cho nen phai co nhung qua trinh tim kiem hoac goi lai nhung du lieu bi mat do. Day chinh la mot trong nhung nguyen nhan chinh gay ra su cham tre.

Anh minh hoa
Application Speed xem o che do Graph

An qua de xem o che do Graph ta biet them nhieu thong tin thu vi khac. Vi du nhu danh gia chat luong Internet luc do (Service Quality).

Va mot so thong so khac nua, ban muon xem them thi bam vao Explain Futher.

Y nghia cac thong so:

Duoi day toi xin dich lai 1 so giai thich cua trang myconnectionPC khi toi an vao Explain Futher:

* Timer Accuracy: Sai so trong qua trinh do
* Download speed: toc do download.
* Upload speed: toc do upload, thuong nho hon toc do download. Ca 2 con so nay danh gia toc do thuc te ngay tai thoi diem ban khao sat. Vi the tuy vao gio cao diem hay khong ma toc do nay se thay doi.
* Max Bandwidth: bang thong toi da : con so nay thuong khong thay doi, du ban test vao bat ki luc nao trong ngay. Day moi chinh la bang thong thuc su ma dich vu ADSL cung cap cho ban.
* Toc do Download thuong nho hon Max Bandwidth la boi nhung ly do khach quan cua duong truyen. Khi ma toc do Download cang gan voi Max Bandwidth thi duong truyen ban dang co "phong do" tot.
* Roundtrip time la thoi gian di chuyen thuc te cua goi du lieu. Nhu trong truong hop cua toi thi Roundtrip time la 450ms (mili giay), trong khi myconnection tinh toan la toc do 880 Kbps can 596ms de truyen du lieu. Nhung voi co che thong minh cua cong nghe truyen thong bay gio thi server luon goi truoc cac goi du lieu toi, truoc khi PC co xu ly xong cac goi du lieu truoc thi cac goi sau da toi noi roi. Do la ly do tai sao thoi gian cua toi lai nhanh hon ly thuyet. Noi chung la con so Roundtrip time cua ban nho hon con so ly thuyet ma Myconnectionpc tinh toan la tot roi.
* Max Delay danh gia su tre nguyen nhan boi cac goi du lieu bi mat trong qua trinh truyen. Max Delay cang cao thi kha nang ban choi game bi lag nhieu va khi tai cac du lieu lon thi se rat cham, tham chi dung khung luon.
* Cuoi cung la Server Quality danh gia chat luong duong truyen bang %. Cang cao thi cang chat luong.

Ngoai chuc nang Application Test mien phi thi con cho phep ta xai thu Capacity Speed trong 15 ngay. Day la chuc nang danh gia kha nang va toc do toi da cua duong truyen danh cho phien ban "Advanced". Neu ban la ky su khao sat duong truyen va san long bo tien ra de mua ban Advanced, ban co the tham khao trang chu myconnectionPC hoac bai viet so sanh giua 2 chuc nang nay tai day .


(Theo TTCN)



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