{"id":21104,"date":"2021-06-30T07:29:24","date_gmt":"2021-06-30T07:29:24","guid":{"rendered":"https:\/\/hocvienit.vn\/?p=21104"},"modified":"2024-07-03T11:11:35","modified_gmt":"2024-07-03T04:11:35","slug":"ket-noi-khong-day-nfc-va-bluetooth-su-khac-biet-thuc-su-la-gi","status":"publish","type":"post","link":"https:\/\/hocvienit.vn\/?p=21104","title":{"rendered":"K\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y NFC v\u00e0 Bluetooth: S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c s\u1ef1 l\u00e0 g\u00ec?"},"content":{"rendered":"

C\u00f3 v\u1ebb nh\u01b0 NFC v\u00e0 Bluetooth c\u00f3 r\u1ea5t nhi\u1ec1u \u0111i\u1ec3m gi\u1ed1ng nhau. B\u1ea1n kh\u00f3 c\u00f3 th\u1ec3 nh\u1eadn ra b\u1ea5t k\u1ef3 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0o gi\u1eefa 2 ki\u1ec3u k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y n\u00e0y n\u1ebfu kh\u00f4ng th\u1eadt s\u1ef1 am hi\u1ec3u c\u00f4ng ngh\u1ec7. V\u1eady k\u1ebft b\u1ed1i kh\u00f4ng d\u00e2y<\/strong>\u00a0<\/span>NFC v\u00e0 Bluetooth c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c s\u1ef1 l\u00e0 g\u00ec<\/strong>?<\/span><\/span><\/p>\n

\"K\u1ebft
K\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y NFC v\u00e0 Bluetooth: S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c s\u1ef1 l\u00e0 g\u00ec?<\/span><\/figcaption><\/figure>\n

C\u1ea3 NFC v\u00e0 Bluetooth \u0111\u1ec1u l\u00e0 c\u00f4ng ngh\u1ec7 kh\u00f4ng d\u00e2y, \u0111\u1ec1u y\u00eau c\u1ea7u ph\u1ea7n c\u1ee9ng \u0111\u1eb7c bi\u1ec7t, ch\u00fang \u0111\u1ec1u chia s\u1ebb th\u00f4ng tin gi\u1eefa 2 thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i. Tuy nhi\u00ean, v\u1eabn c\u00f3 kh\u00e1 nhi\u1ec1u kh\u00e1c bi\u1ec7t, b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y s\u1ebd ch\u1ec9 ra nh\u1eefng \u0111i\u1ec1u \u0111\u00f3.<\/span><\/p>\n

\n

Xem th\u00eam:\u00a0C\u00e1ch s\u1eeda l\u1ed7i Bluetooth kh\u00f4ng l\u00e0m vi\u1ec7c tr\u00ean m\u00e1y t\u00ednh Windows hi\u1ec7u qu\u1ea3<\/a><\/span><\/p>\n<\/blockquote>\n

Bluetooth l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n

Bluetooth \u0111\u00e3 xu\u1ea5t hi\u1ec7n t\u1eeb r\u1ea5t l\u00e2u, tr\u01b0\u1edbc c\u1ea3 khi nh\u1eefng chi\u1ebfc \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh \u0111\u1ea7u ti\u00ean ra m\u1eaft ng\u01b0\u1eddi d\u00f9ng. N\u00f3 \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n l\u1ea7n \u0111\u1ea7u ti\u00ean b\u1edfi c\u00f4ng ty vi\u1ec5n th\u00f4ng Th\u1ee5y \u0110i\u1ec3n – Ericsson v\u00e0o n\u0103m 1989.<\/span><\/p>\n

\"NFC
NFC v\u00e0 Bluetooth: S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c s\u1ef1 l\u00e0 g\u00ec?<\/span><\/figcaption><\/figure>\n

Bluetooth l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u t\u1ea1i s\u1ef1 ki\u1ec7n COMDEX 1999 nh\u01b0ng 1 c\u00f4ng ngh\u1ec7 m\u1edbi h\u1ed7 tr\u1ee3 cho m\u00e1y nghe nh\u1ea1c MP3. Ch\u00ednh tai nghe Bluetooth kh\u00f4ng d\u00e2y \u0111\u00e3 \u0111\u01b0\u1ee3c gi\u1edbi thi\u1ec7u t\u1ea1i s\u1ef1 ki\u1ec7n n\u00e0y.<\/span><\/p>\n

Bluetooth c\u00f3 th\u1ec3 c\u00f3 nhi\u1ec1u c\u00f4ng d\u1ee5ng nh\u01b0ng c\u00f3 1 s\u1ed1 t\u00e1c v\u1ee5 c\u1ed1t l\u00f5i m\u00e0 n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng nhi\u1ec1u nh\u1ea5t:<\/span><\/p>\n

– Truy\u1ec1n nh\u1ea1c t\u1eeb \u0111i\u1ec7n tho\u1ea1i th\u00f4ng minh sang loa ho\u1eb7c c\u1eb7p tai nghe.<\/span><\/p>\n

– G\u1eedi t\u1ec7p \u0111\u1ebfn c\u00e1c thi\u1ebft b\u1ecb kh\u00e1c nhau.<\/span><\/p>\n

– K\u1ebft n\u1ed1i c\u00e1c thi\u1ebft b\u1ecb nh\u01b0 b\u1ed9 \u0111i\u1ec1u khi\u1ec3n tr\u00f2 ch\u01a1i \u0111i\u1ec7n t\u1eed v\u00e0 \u0111\u1ed3ng h\u1ed3 th\u00f4ng minh.<\/span><\/p>\n

 <\/p>\n

NFC l\u00e0 g\u00ec?<\/strong><\/span><\/h2>\n

NFC l\u00e0 m\u1ed9t t\u00edn hi\u1ec7u v\u00f4 tuy\u1ebfn y\u1ebfu. C\u00f4ng ngh\u1ec7 n\u00e0y gi\u1ed1ng Bluetooth \u0111\u1ec1u \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ee5c \u0111\u00edch l\u00e0 truy\u1ec1n d\u1eef li\u1ec7u trong kho\u1ea3ng c\u00e1ch ng\u1eafn. Khi n\u00f3i \u0111\u1ebfn NFC, ch\u00fang ta c\u1ea7n nh\u1eafc \u0111\u1ebfn 2 th\u00e0nh ph\u1ea7n: \u0110\u1ea7u \u0111\u1ecdc v\u00e0 th\u1ebb.<\/span><\/p>\n

\"NFC
NFC v\u00e0 Bluetooth: S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c s\u1ef1 l\u00e0 g\u00ec?<\/span><\/figcaption><\/figure>\n

Theo \u0111\u00f3 khi ng\u01b0\u1eddi d\u00f9ng qu\u00e9t th\u1ebb, \u0111\u1ea7u \u0111\u1ecdc NFC s\u1ebd g\u1eedi 1 t\u00edn hi\u1ec7u \u0111i\u1ec7n t\u1eeb v\u1edbi t\u1ea7n\u00a0 t\u1ea7n s\u1ed1 13,56MHz \u0111\u1ebfn th\u1ebb. S\u00f3ng \u0111i\u1ec7n t\u1eeb s\u1ebd t\u1ea1o 1 d\u00f2ng \u0111i\u1ec7n n\u00e0y t\u1ea1o ra 1 d\u00f2ng \u0111i\u1ec7n \u0111\u1ee7 m\u1ea1nh \u0111\u1ec3 th\u1ebb c\u00f3 th\u1ec3 g\u1eedi l\u1ea1i th\u00f4ng tin v\u1ec1 \u0111\u1ea7u \u0111\u1ecdc.<\/span><\/p>\n

\u0110i\u1ec1u th\u00fa v\u1ecb c\u1ee7a c\u1ee7a NFC l\u00e0 b\u1ea1n kh\u00f4ng cung c\u1ea5p \u0111i\u1ec7n cho th\u1ebb. Nh\u1edd v\u1eady c\u00f4ng ngh\u1ec7 n\u00e0y c\u00f3 t\u00ednh \u1ee9ng d\u1ee5ng r\u1ed9ng r\u00e3i h\u01a1n, v\u00ed d\u1ee5 nh\u01b0 th\u1ebb t\u00edn d\u1ee5ng.<\/span><\/p>\n

 <\/p>\n

S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa NFC v\u00e0 Bluetooth<\/strong><\/span><\/h2>\n

N\u1ebfu kh\u00f4ng hi\u1ec3u r\u00f5 nguy\u00ean l\u00fd, nhi\u1ec1u ng\u01b0\u1eddi cho r\u1eb1ng NFC v\u00e0 Bluetooth l\u00e0 gi\u1ed1ng nhau v\u00ec \u0111\u1ec1u c\u00f3 ch\u1ee9c n\u0103ng truy\u1ec1n t\u1ea3i th\u00f4ng tin t\u1eeb m\u00e1y n\u00e0y qua m\u00e1y kh\u00e1c. Nh\u01b0ng th\u1ef1c t\u1ebf ch\u00fang ch\u1ec9 gi\u1ed1ng nhau \u1edf m\u1ed9t v\u00e0i \u0111i\u1ec3m v\u00e0 c\u00f3 nhi\u1ec1u \u0111\u1eb7c t\u00ednh r\u1ea5t ri\u00eang v\u00e0 kh\u00e1c bi\u1ec7t.<\/span><\/p>\n

\"NFC
NFC v\u00e0 Bluetooth: S\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c s\u1ef1 l\u00e0 g\u00ec?<\/span><\/figcaption><\/figure>\n

Ph\u1ea1m vi truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u<\/span><\/h3>\n

NFC truy\u1ec1n t\u1ea3i d\u1eef li\u1ec7u \u1edf nh\u1eefng kho\u1ea3ng c\u00e1ch r\u1ea5t nh\u1ecf d\u01b0\u1edbi 10cm, nh\u01b0ng v\u1edbi Bluetooth kho\u1ea3ng c\u00e1ch \u0111\u00f3 l\u00e0 10m. V\u00e0 \u0111\u00e2y c\u0169ng ch\u00ednh l\u00e0 \u01b0u \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a NFC, tr\u00e1nh t\u00ecnh tr\u1ea1ng ch\u1ed3ng ch\u00e9o s\u00f3ng trong khu v\u1ef1c c\u00f3 nhi\u1ec1u thi\u1ebft b\u1ecb s\u1eed d\u1ee5ng v\u00e0 h\u1ea1n ch\u1ebf c\u00e1c k\u1ebft n\u1ed1i ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng mong mu\u1ed1n.<\/span><\/p>\n

 <\/p>\n

Th\u1eddi gian gh\u00e9p n\u1ed1i<\/span><\/h3>\n

\u0110\u00e2y c\u0169ng l\u00e0 \u0111i\u1ec3m n\u1ed5i b\u1eadt c\u1ee7a c\u00f4ng ngh\u1ec7 NFC b\u1edfi th\u1eddi gian k\u1ebft n\u1ed1i gi\u1eefa c\u00e1c thi\u1ebft b\u1ecb c\u1ef1c nhanh. K\u1ebft n\u1ed1i NFC kh\u00f4ng ph\u1ea3i thao t\u00e1c b\u1eb1ng tay nh\u01b0 Bluetooth m\u00e0 hai thi\u1ebft b\u1ecb c\u00f3 NFC s\u1ebd t\u1ef1 \u0111\u1ed9ng hi\u1ec3u v\u00e0 k\u1ebft n\u1ed1i v\u1edbi nhau ch\u1ec9 trong kho\u1ea3ng 1\/10 gi\u00e2y.<\/span><\/p>\n

Trong khi Bluetooth phi\u00ean b\u1ea3n 3.0 hay 4.0 m\u1edbi nh\u1ea5t c\u0169ng kh\u00f4ng th\u1ec3 l\u00e0m \u0111\u01b0\u1ee3c \u0111i\u1ec1u n\u00e0y. B\u1edfi v\u1eady, \u0111\u00f4i khi trong th\u1ef1c t\u1ebf k\u1ebft n\u1ed1i NFC c\u0169ng th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 thay th\u1ebf cho qu\u00e1 tr\u00ecnh k\u1ebft n\u1ed1i ph\u1ee9c t\u1ea1p gi\u1eefa 2 thi\u1ebft b\u1ecb Bluetooth.<\/span><\/p>\n

 <\/p>\n

T\u1ed1c \u0111\u1ed9 truy\u1ec1n file<\/span><\/h3>\n

\u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 gi\u00fap Bluetooth lu\u00f4n \u0111\u1ee9ng v\u1eefng v\u00e0 kh\u00f4ng th\u1ec3 b\u1ecb thay th\u1ebf b\u1edfi NFC khi c\u1ea7n truy\u1ec1n c\u00e1c file c\u00f3 d\u1eef li\u1ec7u l\u1edbn. B\u1edfi NFC ho\u1ea1t \u0111\u1ed9ng \u1edf t\u1ea7n s\u1ed1 radio b\u0103ng t\u1ea7n ISM 13,56MHz v\u00e0 t\u1ed1c \u0111\u1ed9 truy\u1ec1n kho\u1ea3ng t\u1eeb 106 – 424 Kb\/s.<\/span><\/p>\n

Trong khi \u0111\u00f3 \u1edf phi\u00ean b\u1ea3n 2.1 EDR b\u0103ng t\u1ea7n c\u1ee7a Bluetooth l\u00e0 2,4 GHz n\u00ean t\u1ed1c \u0111\u1ed9 \u0111\u1ea1t 2,1 Mb\/s. \u0110\u1ed1i v\u1edbi phi\u00ean b\u1ea3n 3.0+HS th\u00ec t\u1ed1c \u0111\u1ed9 t\u1ed1i \u0111a c\u1ee7a Bluetooth c\u00f3 th\u1ec3 l\u00ean t\u1edbi 24 Mb\/s ( 1Mb = 1024 Kb).<\/span><\/p>\n

\n

Xem th\u00eam:\u00a0L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 Bluetooth tr\u00ean Macbook?<\/a><\/span><\/p>\n<\/blockquote>\n

Gi\u1edd \u0111\u00e2y, s\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa Bluetooth v\u00e0 NFC \u0111\u00e3 r\u00f5 r\u00e0ng h\u01a1n, nh\u00ecn b\u1ec1 ngo\u00e0i, Bluetooth v\u00e0 NFC c\u00f3 v\u1ebb gi\u1ed1ng nhau v\u00e0 gi\u1ed1ng nhau. Nh\u01b0ng t\u00ecm hi\u1ec3u s\u00e2u h\u01a1n th\u00ec c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t r\u00f5 r\u00e0ng. Bluetooth nhanh h\u01a1n nhi\u1ec1u khi truy\u1ec1n t\u1ec7p, nh\u01b0ng NFC t\u1ed1t h\u01a1n khi ti\u00eau th\u1ee5 \u0111i\u1ec7n n\u0103ng v\u00e0 b\u1ea3o m\u1eadt h\u01a1n. NFC v\u00e0 Bluetooth, b\u1ea1n h\u00e3y th\u1eed tr\u1ea3i nghi\u1ec7m c\u1ea3 2 v\u00e0 l\u1ef1a ch\u1ecdn th\u00edch c\u00f4ng ngh\u1ec7 n\u00e0o h\u01a1n nh\u00e9.<\/span><\/p>\n

M\u1ecdi chi ti\u1ebft xin vui l\u00f2ng li\u00ean h\u1ec7:
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\nH\u1ecdc vi\u1ec7n IT.vn \u2013 Truy\u1ec1n ngh\u1ec1 th\u1ef1c t\u1ebf c\u00f9ng b\u1ea1n \u0111\u1ebfn th\u00e0nh c\u00f4ng!\u00a0<\/i><\/strong><\/p>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

C\u00f3 v\u1ebb nh\u01b0 NFC v\u00e0 Bluetooth c\u00f3 r\u1ea5t nhi\u1ec1u \u0111i\u1ec3m gi\u1ed1ng nhau. B\u1ea1n kh\u00f3 c\u00f3 th\u1ec3 nh\u1eadn ra b\u1ea5t k\u1ef3 s\u1ef1 kh\u00e1c bi\u1ec7t n\u00e0o gi\u1eefa 2 ki\u1ec3u k\u1ebft n\u1ed1i kh\u00f4ng d\u00e2y n\u00e0y n\u1ebfu kh\u00f4ng th\u1eadt s\u1ef1 am hi\u1ec3u c\u00f4ng ngh\u1ec7. V\u1eady k\u1ebft b\u1ed1i kh\u00f4ng d\u00e2y NFC v\u00e0 Bluetooth c\u00f3 s\u1ef1 kh\u00e1c bi\u1ec7t th\u1ef1c s\u1ef1 l\u00e0 g\u00ec?<\/p>\n","protected":false},"author":95,"featured_media":21105,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96,94],"tags":[566],"_links":{"self":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/21104"}],"collection":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/users\/95"}],"replies":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=21104"}],"version-history":[{"count":0,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/posts\/21104\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=\/wp\/v2\/media\/21105"}],"wp:attachment":[{"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=21104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=21104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hocvienit.vn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=21104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}