Wi-Fi 83 là cng nào? Gii thích chi tit d hiu

Wi-Fi 83 la gi? Nguon goc cua su nham lan

Khi tim kiem cu phap "qual e a porta do Wi Fi 83" hay "Wi-Fi 83 la cong nao", nhieu nguoi thuong hieu nham rang Wi-Fi co mot cong mang rieng biet danh so 83. Thuc te, khong ton tai bat ky cong mang nao duoc goi la "Wi-Fi 83". Thuat ngu nay xuat phat tu viec nguoi dung doc sai day IP cua router hoac bo dinh tuyen. Cu the, so 83 thuong la phan cuoi cung cua mot dia chi IP, chang han nhu 192.168.1.83, va bi nham tuong la mot cong mang. Wi-Fi hoat dong dua tren chuan IEEE 802.11, su dung cac tan so radio nhu 2.4 GHz hoac 5 GHz, chu khong can den cong mang rieng. Do do, viec hoi "cong cua Wi-Fi 83" thuc chat la hieu nham ve cach thuc hoat dong cua thiet bi mang.

Dia chi IP 192.168.1.83 khac voi cong mang nhu the nao?

De de hieu, can phan biet ro giua dia chi IP va cong mang. Dia chi IP, chang han nhu 192.168.1.83, la mot day so nhat dinh duoc gan cho moi thiet bi trong mang noi bo, bao gom may tinh, dien thoai, hoac router. No giong nhu dia chi nha, giup cac thiet bi khac tim den va ket noi. Trong khi do, cong mang la mot "cua" logic cho phep cac ung dung hoac dich vu cu the truy cap vao thiet bi. Vi du, cong 80 thuong dung cho HTTP, cong 443 cho HTTPS. Khi ban nhap "192.168.1.83:80" tren trinh duyet, ban dang yeu cau truy cap vao dia chi IP do thong qua cong 80. Neu ban chi nhap "192.168.1.83" ma khong co cong, trinh duyet se tu dong dung cong mac dinh la 80. So 83 trong cau hoi nay chinh la phan cuoi cua IP, khong phai cong. Dieu nay giai thich tai sao khong co "cong Wi-Fi 83" thuc su.

Router va cong quan ly mac dinh

Router gia dinh hoac van phong nho thuong co mot trinh quan ly web, cho phep nguoi dung cau hinh mang, mat khau, va cac thiet lap khac. Trinh quan ly nay duoc truy cap qua mot trinh duyet web bang cach nhap dia chi IP cua router. Theo mac dinh, cong duoc su dung cho trinh quan ly la cong 80 (HTTP) hoac 443 (HTTPS). Day la cac cong chuan cho giao thuc web. Neu nha san xuat router thay doi cong quan ly, ho co the dat thanh cong 8080, 8443, hoac bat ky con so nao khac, nhung rat hiem khi dung so 83. Vi du, mot router co IP 192.168.1.83 se mac dinh mo cong 80 cho giao dien quan ly. Vay, neu ban thay "83" xuat hien trong truy van, do la dia chi IP chu khong phai cong.

Wi-Fi 83 là cng nào? Gii thích chi tit d hiu - 1

Bang so sanh: IP va cong mang trong router

De giup ban phan biet ro hon, duoi day la bang so sanh giua dia chi IP va cong mang trong boi canh cua router Wi-Fi:

Dac diem	Dia chi IP (vi du: 192.168.1.83)	Cong mang (vi du: 80, 443)
Vai tro	Xac dinh thiet bi trong mang	Xac dinh dich vu hoac ung dung tren thiet bi
Vi du su dung	Nhap vao trinh duyet de mo trang quan ly router	Them vao sau dia chi IP, chang han 192.168.1.83:80
Mac dinh cho router	Thuong la 192.168.0.1, 192.168.1.1, hoac 192.168.1.83	80 (HTTP) va 443 (HTTPS)
Co the thay doi khong	Co, bang cach cau hinh DHCP hoac IP tinh	Co, trong phan cai dat nang cao cua router

Nhu bang tren cho thay, so 83 thuoc ve dia chi IP, khong lien quan den cong. Do do, khi tim kiem "cong Wi-Fi 83", ban dang bi nham lan giua hai khai niem nay.

Cac nguyen nhan khac gay ra nham lan ve cong 83

Ngoai viec doc sai IP, con co mot vai nguyen nhan khac khien nguoi dung nghi rang ton tai cong Wi-Fi 83. Thu nhat, mot so thiet bi mang cung cap dich vu nhu DVR hoac camera an ninh co the su dung cong 83 cho muc dich dac biet, chang han nhu quay phim hoac luu tru du lieu. Tuy nhien, day khong phai la tieu chuan chung cho Wi-Fi. Thu hai, trong mot so firware hoac phan mem router tu tao, nguoi dung co the cau hinh cong quan ly la 83 de tranh bi tan cong, nhung dieu nay rat hiem va phu thuoc vao tung truong hop. Thu ba, co the nguoi dung doc tai lieu huong dan nham lan, chang han nhu mot so bai viet tren mang xa hoi co the de cap den "cong 83" nhu mot cach goi tat cho mang con hoac VLAN. Tat ca nhung dieu nay khong thay doi su that co ban: Wi-Fi khong co cong mac dinh mang so 83.

Wi-Fi 83 là cng nào? Gii thích chi tit d hiu - 2

Danh sach cac cong pho bien trong thiet bi mang

De lam ro hon ve cac cong thuong duoc su dung trong thiet bi mang, duoi day la danh sach cac cong pho bien va chuc nang cua chung:

Cong 20 va 21: Su dung cho giao thuc FTP (File Transfer Protocol) de truyen file.
Cong 22: Su dung cho SSH (Secure Shell), bao mat cho truy cap tu xa.
Cong 23: Su dung cho Telnet, mot giao thuc ket noi tu xa khong bao mat.
Cong 25: Su dung cho SMTP (Simple Mail Transfer Protocol) de gui email.
Cong 53: Su dung cho DNS (Domain Name System) de phan giai ten mien.
Cong 80: Su dung cho HTTP, la cong chinh de truy cap web va giao dien quan ly router.
Cong 443: Su dung cho HTTPS, la phien ban bao mat cua HTTP.
Cong 8080: Thuong dung thay the cho cong 80 khi can cau hinh nang cao.
Cong 8443: Thuong dung thay the cho cong 443 trong mot so thiet bi quan ly tu xa.

Nhu ban thay, khong co cong 83 trong danh sach nay. Dieu nay cung co khan nang "Wi-Fi 83" chi la mot biet danh khong chinh thuc hoac mot loi danh may trong tai lieu. Vi du, mot so router co the co cong quan ly mac dinh la 80, nhung neu nha san xuat dat nham hoac nguoi dung cau hinh sai, cong co the tro thanh 83, nhung rat hiem.

Thuc te: Cach truy cap router co IP 192.168.1.83

Neu ban co mot router co dia chi IP la 192.168.1.83, viec truy cap giao dien quan ly rat don gian. Ban chi can mo trinh duyet web va nhap "http://192.168.1.83" vao thanh dia chi. Trinh duyet se tu dong ket noi den cong 80 mac dinh. Neu router cua ban da duoc cau hinh su dung HTTPS, ban co the nhap "https://192.168.1.83" de ket noi den cong 443. Trong mot so truong hop, neu router bat buoc dung cong khac, ban can nhap cu the, chang han nhu "http://192.168.1.83:8080". Tuy nhien, nhu da de cap, cong 83 khong phai la lua chon mac dinh. Vay, khi ban tim kiem "cong Wi-Fi 83", ban thuc chat dang tim cach truy cap router tai IP 192.168.1.83 thong qua cong chuan la 80 hoac 443.

Wi-Fi 83 là cng nào? Gii thích chi tit d hiu - 3

Tai lieu tham khao tu cac nguon dang tin cay

De cung cap thong tin chinh xac, chung toi da tham khao cac nguon duoi day. Cac tai lieu nay giai thich ro ve dia chi IP, cong mang, va cach thuc hoat dong cua router. Ban co the xem them de hieu sau hon:

Thu nhat, trang Router Network dinh nghia cong mac dinh cho giao dien quan ly router la 80 (HTTP) va 443 (HTTPS). Trang nay cung giai thich ve cac dia chi IP noi bo, bao gom ca 192.168.1.83. Ban co the truy cap tai: Router Network - Dia chi IP.

Thu hai, tai lieu tu Cisco Small Business Support mo ta ve cong quan ly cua cac thiet bi mang, trong do khang dinh rang cong mac dinh la 80/443. Tai lieu nay co the giup ban hieu ve tieu chuan cong trong thiet bi mang: Cisco - Thong so ky thuat WAP581.

Wi-Fi 83 là cng nào? Gii thích chi tit d hiu - 4

Thu ba, tai lieu huong dan su dung router MF283 tu Scribd cho thay router nay co the truy cap tai dia chi 192.168.0.1 thong qua cong 80. Dieu nay cung co cho thay rang so 83 khong phai la cong. Ban co the xem them tai: Scribd - Huong dan su dung MF283.

Cuoi cung, mot cuoc thao luan tren dien dan Intelbras cho thay rang cac cong tieu chuan cho DVR la 37777 va 80, va khong co cong 83 nao duoc xem la tieu chuan. Dieu nay cung co them bang chung rang "cong Wi-Fi 83" khong ton tai: Dien dan Intelbras - Cong 83.

Ket luan

Tom lai, khong co khai niem "cong Wi-Fi 83" trong thuc te. So 83 xuat hien trong truy van thuong la phan cuoi cua dia chi IP nhu 192.168.1.83, chu khong phai cong mang. Router su dung cong 80 hoac 443 cho giao dien quan ly mac dinh. Cac nguon tai lieu dang tin cay da xac nhan dieu nay. Neu ban gap kho khan khi truy cap router, hay kiem tra lai dia chi IP va su dung cong chuan. Hy vong bai viet nay da giai thich ro rang va giup ban hieu dung ve van de nay.