{"id":1462,"date":"2024-11-11T03:51:59","date_gmt":"2024-11-11T03:51:59","guid":{"rendered":"https:\/\/kb.lagonet.vn\/?p=1462"},"modified":"2024-11-11T03:51:59","modified_gmt":"2024-11-11T03:51:59","slug":"check-jitter-bang-mtr-lam-sao-su-dung","status":"publish","type":"post","link":"https:\/\/kb.lagonet.vn\/?p=1462","title":{"rendered":"Check jitter b\u1eb1ng mtr, l\u00e0m sao s\u1eed d\u1ee5ng?"},"content":{"rendered":"\n<p>\u0110\u1ec3 ki\u1ec3m tra jitter (\u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9 tr\u1ec5) b\u1eb1ng c\u00f4ng c\u1ee5 <strong>MTR<\/strong> (My Traceroute), b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m theo c\u00e1c b\u01b0\u1edbc sau:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. C\u00e0i \u0111\u1eb7t MTR (n\u1ebfu ch\u01b0a c\u00f3)<\/h3>\n\n\n\n<p>N\u1ebfu b\u1ea1n ch\u01b0a c\u00e0i \u0111\u1eb7t MTR tr\u00ean h\u1ec7 th\u1ed1ng c\u1ee7a m\u00ecnh, b\u1ea1n c\u00f3 th\u1ec3 c\u00e0i \u0111\u1eb7t n\u00f3 th\u00f4ng qua c\u00e1c tr\u00ecnh qu\u1ea3n l\u00fd g\u00f3i t\u01b0\u01a1ng \u1ee9ng:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Tr\u00ean Ubuntu\/Debian<\/strong>:<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  sudo apt update\n  sudo apt install mtr<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Tr\u00ean CentOS\/RHEL<\/strong>:<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  sudo yum install mtr<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Tr\u00ean macOS<\/strong> (s\u1eed d\u1ee5ng Homebrew):<\/li>\n<\/ul>\n\n\n\n<pre class=\"wp-block-code\"><code>  brew install mtr<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">2. Ki\u1ec3m tra jitter b\u1eb1ng MTR<\/h3>\n\n\n\n<p>\u0110\u1ec3 ki\u1ec3m tra jitter, b\u1ea1n s\u1ebd th\u1ef1c hi\u1ec7n l\u1ec7nh MTR t\u1edbi m\u1ed9t \u0111\u1ecba ch\u1ec9 IP ho\u1eb7c t\u00ean mi\u1ec1n. MTR s\u1ebd cung c\u1ea5p th\u00f4ng tin v\u1ec1 \u0111\u1ed9 tr\u1ec5 (latency), bao g\u1ed3m c\u1ea3 jitter (bi\u1ebfn \u0111\u1ed9ng \u0111\u1ed9 tr\u1ec5).<\/p>\n\n\n\n<p>C\u00e1ch s\u1eed d\u1ee5ng MTR:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>mtr --report --report-cycles=10 &lt;\u0111\u1ecba ch\u1ec9 IP ho\u1eb7c t\u00ean mi\u1ec1n&gt;<\/code><\/pre>\n\n\n\n<p>Trong \u0111\u00f3:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>--report<\/code>: Ch\u1ebf \u0111\u1ed9 b\u00e1o c\u00e1o s\u1ebd t\u1ea1o ra m\u1ed9t b\u00e1o c\u00e1o t\u00f3m t\u1eaft khi qu\u00e1 tr\u00ecnh ki\u1ec3m tra k\u1ebft th\u00fac.<\/li>\n\n\n\n<li><code>--report-cycles=10<\/code>: S\u1ed1 l\u1ea7n l\u1eb7p l\u1ea1i c\u1ee7a th\u1eed nghi\u1ec7m (10 v\u00f2ng trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y).<\/li>\n<\/ul>\n\n\n\n<p>K\u1ebft qu\u1ea3 c\u1ee7a l\u1ec7nh n\u00e0y s\u1ebd hi\u1ec3n th\u1ecb m\u1ed9t b\u00e1o c\u00e1o v\u1edbi c\u00e1c th\u00f4ng s\u1ed1 nh\u01b0:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Loss<\/strong>: T\u1ef7 l\u1ec7 m\u1ea5t g\u00f3i tin.<\/li>\n\n\n\n<li><strong>Snt<\/strong>: S\u1ed1 g\u00f3i tin \u0111\u00e3 g\u1eedi.<\/li>\n\n\n\n<li><strong>Last<\/strong>: Th\u1eddi gian tr\u1ec5 (latency) c\u1ee7a g\u00f3i tin cu\u1ed1i c\u00f9ng.<\/li>\n\n\n\n<li><strong>Avg<\/strong>: Tr\u1ec5 trung b\u00ecnh.<\/li>\n\n\n\n<li><strong>Best<\/strong>: Tr\u1ec5 t\u1ed1t nh\u1ea5t.<\/li>\n\n\n\n<li><strong>Worst<\/strong>: Tr\u1ec5 t\u1ed3i t\u1ec7 nh\u1ea5t.<\/li>\n\n\n\n<li><strong>Stdev<\/strong>: \u0110\u1ed9 l\u1ec7ch chu\u1ea9n, c\u00f3 th\u1ec3 coi l\u00e0 ch\u1ec9 s\u1ed1 c\u1ee7a jitter (bi\u1ebfn \u0111\u1ed9ng \u0111\u1ed9 tr\u1ec5).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. Ph\u00e2n t\u00edch k\u1ebft qu\u1ea3<\/h3>\n\n\n\n<p>Jitter \u0111\u01b0\u1ee3c t\u00ednh t\u1eeb \u0111\u1ed9 l\u1ec7ch chu\u1ea9n (Stdev) trong c\u00e1c k\u1ebft qu\u1ea3 tr\u1ec5 (latency). M\u1ed9t gi\u00e1 tr\u1ecb <strong>Stdev<\/strong> l\u1edbn cho th\u1ea5y jitter cao, t\u1ee9c l\u00e0 \u0111\u1ed9 tr\u1ec5 bi\u1ebfn \u0111\u1ed9ng nhi\u1ec1u. Ng\u01b0\u1ee3c l\u1ea1i, gi\u00e1 tr\u1ecb <strong>Stdev<\/strong> th\u1ea5p cho th\u1ea5y \u0111\u1ed9 tr\u1ec5 \u1ed5n \u0111\u1ecbnh h\u01a1n.<\/p>\n\n\n\n<p>V\u00ed d\u1ee5 k\u1ebft qu\u1ea3:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>HOST: example.com               Loss%   Snt   Last   Avg  Best  Worst  Stdev\n  1. 192.168.1.1                 0.0%    10   0.35   0.36   0.33   0.40   0.02\n  2. 203.0.113.1                 0.0%    10   10.10   10.15   10.02   10.30   0.07\n  3. 198.51.100.1                0.0%    10   50.30   50.35   50.25   50.50   0.05<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stdev<\/strong> cho bi\u1ebft s\u1ef1 bi\u1ebfn \u0111\u1ed9ng \u0111\u1ed9 tr\u1ec5 c\u1ee7a m\u1ed7i hop.<\/li>\n\n\n\n<li>N\u1ebfu <strong>Stdev<\/strong> c\u00f3 gi\u00e1 tr\u1ecb cao, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 th\u1ec3 ch\u1ec9 ra m\u1ed9t v\u1ea5n \u0111\u1ec1 v\u1ec1 jitter ho\u1eb7c kh\u00f4ng \u1ed5n \u0111\u1ecbnh trong m\u1ea1ng.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">L\u01b0u \u00fd:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Jitter th\u01b0\u1eddng c\u00f3 \u1ea3nh h\u01b0\u1edfng l\u1edbn trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh, v\u00ed d\u1ee5 nh\u01b0 tho\u1ea1i VoIP, video conferencing, ho\u1eb7c gaming tr\u1ef1c tuy\u1ebfn.<\/li>\n\n\n\n<li>K\u1ebft qu\u1ea3 t\u1eeb MTR ch\u1ec9 ra jitter qua nhi\u1ec1u b\u01b0\u1edbc \u0111\u01b0\u1eddng truy\u1ec1n (hop) v\u00e0 c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n x\u00e1c \u0111\u1ecbnh li\u1ec7u v\u1ea5n \u0111\u1ec1 c\u00f3 n\u1eb1m \u1edf m\u1ea1ng n\u1ed9i b\u1ed9, ISP, hay c\u00e1c tuy\u1ebfn \u0111\u01b0\u1eddng xa h\u01a1n.<\/li>\n<\/ul>\n\n\n\n<p>\u0110\u1ec3 \u0111\u00e1nh gi\u00e1 <strong>jitter<\/strong> (bi\u1ebfn \u0111\u1ed9ng \u0111\u1ed9 tr\u1ec5) l\u00e0 <strong>th\u1ea5p<\/strong> hay <strong>cao<\/strong>, b\u1ea1n c\u1ea7n ph\u1ea3i hi\u1ec3u r\u1eb1ng m\u1ee9c \u0111\u1ed9 jitter c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 tr\u1ec5 th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh, nh\u01b0 <strong>VoIP<\/strong>, <strong>video conferencing<\/strong>, ho\u1eb7c <strong>gaming tr\u1ef1c tuy\u1ebfn<\/strong>. M\u1eb7c d\u00f9 kh\u00f4ng c\u00f3 m\u1ed9t ng\u01b0\u1ee1ng tuy\u1ec7t \u0111\u1ed1i n\u00e0o cho m\u1ecdi t\u00ecnh hu\u1ed1ng, b\u1ea1n c\u00f3 th\u1ec3 tham kh\u1ea3o c\u00e1c m\u1ee9c jitter sau \u0111\u00e2y \u0111\u1ec3 \u0111\u00e1nh gi\u00e1:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">1. <strong>Jitter th\u1ea5p (\u1ed4n \u0111\u1ecbnh)<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>0 &#8211; 10 ms<\/strong>: \u0110\u00e2y l\u00e0 m\u1ee9c jitter <strong>r\u1ea5t th\u1ea5p<\/strong> v\u00e0 kh\u00e1 l\u00fd t\u01b0\u1edfng cho h\u1ea7u h\u1ebft c\u00e1c \u1ee9ng d\u1ee5ng, k\u1ec3 c\u1ea3 c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c nh\u01b0 tho\u1ea1i VoIP ho\u1eb7c video call.<\/li>\n\n\n\n<li>C\u00e1c cu\u1ed9c g\u1ecdi VoIP, video call (Skype, Zoom, v.v.) s\u1ebd kh\u00f4ng g\u1eb7p v\u1ea5n \u0111\u1ec1 g\u00ec \u1edf m\u1ee9c jitter n\u00e0y.<\/li>\n\n\n\n<li>Game tr\u1ef1c tuy\u1ebfn c\u0169ng s\u1ebd m\u01b0\u1ee3t m\u00e0 v\u00e0 kh\u00f4ng c\u00f3 \u0111\u1ed9 tr\u1ec5 l\u1edbn g\u00e2y gi\u1eadt lag.<\/li>\n\n\n\n<li><strong>10 &#8211; 20 ms<\/strong>: Jitter v\u1eabn kh\u00e1 \u1ed5n \u0111\u1ecbnh v\u00e0 c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c cho c\u00e1c \u1ee9ng d\u1ee5ng c\u1ea7n \u0111\u1ed9 tr\u1ec5 th\u1ea5p.<\/li>\n\n\n\n<li>V\u1edbi c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c, \u0111\u00f4i khi c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y m\u1ed9t ch\u00fat thay \u0111\u1ed5i, nh\u01b0ng kh\u00f4ng \u0111\u00e1ng k\u1ec3.<\/li>\n\n\n\n<li>C\u00e1c d\u1ecbch v\u1ee5 tho\u1ea1i v\u00e0 video v\u1eabn ho\u1ea1t \u0111\u1ed9ng t\u1ed1t \u1edf m\u1ee9c n\u00e0y.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">2. <strong>Jitter trung b\u00ecnh (M\u1ed9t ch\u00fat bi\u1ebfn \u0111\u1ed9ng)<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>20 &#8211; 50 ms<\/strong>: \u0110\u00e2y l\u00e0 m\u1ee9c jitter c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c, nh\u01b0ng v\u1eabn c\u00f3 th\u1ec3 g\u00e2y ra m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 nh\u1ecf trong c\u00e1c \u1ee9ng d\u1ee5ng y\u00eau c\u1ea7u \u0111\u1ed9 tr\u1ec5 th\u1ea5p, ch\u1eb3ng h\u1ea1n nh\u01b0:<\/li>\n\n\n\n<li>C\u00e1c cu\u1ed9c g\u1ecdi VoIP c\u00f3 th\u1ec3 c\u00f3 m\u1ed9t ch\u00fat gi\u1eadt hay \u00e2m thanh b\u1ecb \u0111\u1ee9t qu\u00e3ng n\u1ebfu jitter t\u0103ng cao \u0111\u1ed9t ng\u1ed9t.<\/li>\n\n\n\n<li>Video call c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i v\u1ea5n \u0111\u1ec1 nh\u01b0 \u0111\u1ed9 tr\u1ec5 h\u00ecnh \u1ea3nh v\u00e0 \u00e2m thanh kh\u00f4ng \u0111\u1ed3ng b\u1ed9.<\/li>\n\n\n\n<li>Game tr\u1ef1c tuy\u1ebfn c\u00f3 th\u1ec3 b\u1ecb lag ho\u1eb7c m\u1ea5t ph\u1ea3n h\u1ed3i khi jitter bi\u1ebfn \u0111\u1ed9ng m\u1ea1nh.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">3. <strong>Jitter cao (Bi\u1ebfn \u0111\u1ed9ng l\u1edbn)<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>50 &#8211; 100 ms<\/strong>: \u0110\u00e2y l\u00e0 m\u1ee9c jitter c\u00f3 th\u1ec3 g\u00e2y ra <strong>gi\u1eadt lag<\/strong> r\u00f5 r\u1ec7t, \u1ea3nh h\u01b0\u1edfng \u0111\u00e1ng k\u1ec3 \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c.<\/li>\n\n\n\n<li>C\u00e1c cu\u1ed9c g\u1ecdi VoIP s\u1ebd c\u00f3 hi\u1ec7n t\u01b0\u1ee3ng \u00e2m thanh \u0111\u1ee9t qu\u00e3ng ho\u1eb7c m\u1ea5t k\u1ebft n\u1ed1i.<\/li>\n\n\n\n<li>Video conferencing c\u00f3 th\u1ec3 g\u1eb7p t\u00ecnh tr\u1ea1ng h\u00ecnh \u1ea3nh v\u00e0 \u00e2m thanh kh\u00f4ng \u0111\u1ed3ng b\u1ed9, ch\u1ea5t l\u01b0\u1ee3ng gi\u1ea3m s\u00fat.<\/li>\n\n\n\n<li>Game tr\u1ef1c tuy\u1ebfn s\u1ebd g\u1eb7p lag ho\u1eb7c hi\u1ec7n t\u01b0\u1ee3ng m\u1ea5t k\u1ebft n\u1ed1i, l\u00e0m gi\u00e1n \u0111o\u1ea1n tr\u1ea3i nghi\u1ec7m.<\/li>\n\n\n\n<li><strong>Tr\u00ean 100 ms<\/strong>: \u0110\u00e2y l\u00e0 m\u1ee9c jitter <strong>r\u1ea5t cao<\/strong>, v\u00e0 th\u01b0\u1eddng s\u1ebd g\u00e2y ra c\u00e1c v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng trong t\u1ea5t c\u1ea3 c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c.<\/li>\n\n\n\n<li>Th\u1eadm ch\u00ed cu\u1ed9c g\u1ecdi tho\u1ea1i s\u1ebd kh\u00f4ng c\u00f2n s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c \u1ed5n \u0111\u1ecbnh.<\/li>\n\n\n\n<li>Video call c\u00f3 th\u1ec3 b\u1ecb gi\u1eadt n\u00e1t, lag ho\u1eb7c th\u1eadm ch\u00ed ng\u1eebng ho\u1ea1t \u0111\u1ed9ng.<\/li>\n\n\n\n<li>C\u00e1c tr\u00f2 ch\u01a1i tr\u1ef1c tuy\u1ebfn s\u1ebd g\u1ea7n nh\u01b0 kh\u00f4ng th\u1ec3 ch\u01a1i \u0111\u01b0\u1ee3c do \u0111\u1ed9 tr\u1ec5 qu\u00e1 l\u1edbn.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">4. <strong>Ch\u1ec9 s\u1ed1 Stdev (\u0110\u1ed9 l\u1ec7ch chu\u1ea9n)<\/strong>:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Trong k\u1ebft qu\u1ea3 c\u1ee7a <strong>MTR<\/strong>, <strong>Stdev<\/strong> (standard deviation) cho b\u1ea1n bi\u1ebft m\u1ee9c \u0111\u1ed9 <strong>bi\u1ebfn \u0111\u1ed9ng<\/strong> c\u1ee7a \u0111\u1ed9 tr\u1ec5 gi\u1eefa c\u00e1c g\u00f3i tin.<\/li>\n\n\n\n<li><strong>Stdev th\u1ea5p<\/strong> (0-10 ms) c\u00f3 ngh\u0129a l\u00e0 \u0111\u1ed9 tr\u1ec5 \u1ed5n \u0111\u1ecbnh, kh\u00f4ng c\u00f3 s\u1ef1 thay \u0111\u1ed5i l\u1edbn.<\/li>\n\n\n\n<li><strong>Stdev cao<\/strong> (tr\u00ean 50 ms) cho th\u1ea5y jitter cao, c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn ch\u1ea5t l\u01b0\u1ee3ng k\u1ebft n\u1ed1i.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 jitter t\u1eeb k\u1ebft qu\u1ea3 MTR?<\/strong><\/h3>\n\n\n\n<p>Gi\u1ea3 s\u1eed b\u1ea1n ch\u1ea1y l\u1ec7nh MTR v\u00e0 nh\u1eadn \u0111\u01b0\u1ee3c k\u1ebft qu\u1ea3 nh\u01b0 sau:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>HOST: example.com               Loss%   Snt   Last   Avg  Best  Worst  Stdev\n  1. 192.168.1.1                 0.0%    10   0.35   0.36   0.33   0.40   0.02\n  2. 203.0.113.1                 0.0%    10   10.10   10.15   10.02   10.30   0.07\n  3. 198.51.100.1                0.0%    10   50.30   50.35   50.25   50.50   0.05<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stdev (\u0110\u1ed9 l\u1ec7ch chu\u1ea9n)<\/strong>: 0.02, 0.07, 0.05 l\u1ea7n l\u01b0\u1ee3t cho th\u1ea5y r\u1eb1ng jitter r\u1ea5t th\u1ea5p v\u00e0 \u1ed5n \u0111\u1ecbnh, t\u1ee9c l\u00e0 m\u1ea1ng \u0111ang ho\u1ea1t \u0111\u1ed9ng r\u1ea5t t\u1ed1t, kh\u00f4ng c\u00f3 s\u1ef1 bi\u1ebfn \u0111\u1ed9ng l\u1edbn trong \u0111\u1ed9 tr\u1ec5.<\/li>\n<\/ul>\n\n\n\n<p>N\u1ebfu <strong>Stdev<\/strong> c\u1ee7a b\u1ea1n l\u00e0 tr\u00ean 50 ms ho\u1eb7c th\u1eadm ch\u00ed 100 ms, \u0111\u00f3 c\u00f3 th\u1ec3 l\u00e0 d\u1ea5u hi\u1ec7u c\u1ee7a m\u1ed9t <strong>jitter cao<\/strong>, v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 g\u1eb7p ph\u1ea3i c\u00e1c v\u1ea5n \u0111\u1ec1 v\u1ec1 k\u1ebft n\u1ed1i nh\u01b0 gi\u1eadt lag ho\u1eb7c m\u1ea5t g\u00f3i tin.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">K\u1ebft lu\u1eadn:<\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Jitter th\u1ea5p<\/strong>: D\u01b0\u1edbi 10 ms, m\u1ea1ng \u1ed5n \u0111\u1ecbnh, kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c.<\/li>\n\n\n\n<li><strong>Jitter trung b\u00ecnh<\/strong>: T\u1eeb 10 \u0111\u1ebfn 50 ms, c\u00f3 th\u1ec3 nh\u1eadn th\u1ea5y m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 nh\u1ecf, nh\u01b0ng v\u1eabn ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p.<\/li>\n\n\n\n<li><strong>Jitter cao<\/strong>: Tr\u00ean 50 ms, c\u00f3 th\u1ec3 g\u00e2y gi\u00e1n \u0111o\u1ea1n v\u00e0 \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn tr\u1ea3i nghi\u1ec7m ng\u01b0\u1eddi d\u00f9ng, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c \u1ee9ng d\u1ee5ng th\u1eddi gian th\u1ef1c.<\/li>\n<\/ul>\n\n\n\n<p>C\u00e1c gi\u00e1 tr\u1ecb <strong>0.02<\/strong>, <strong>0.07<\/strong>, <strong>0.05<\/strong> m\u00e0 t\u00f4i \u0111\u00e3 \u0111\u1ec1 c\u1eadp l\u00e0 c\u00e1c gi\u00e1 tr\u1ecb c\u1ee7a <strong>Stdev<\/strong> (\u0111\u1ed9 l\u1ec7ch chu\u1ea9n), v\u00e0 <strong>\u0111\u01a1n v\u1ecb c\u1ee7a ch\u00fang l\u00e0 milliseconds (ms)<\/strong>.<\/p>\n\n\n\n<p>Trong k\u1ebft qu\u1ea3 c\u1ee7a MTR, <strong>Stdev<\/strong> (standard deviation) ph\u1ea3n \u00e1nh s\u1ef1 <strong>bi\u1ebfn \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9 tr\u1ec5<\/strong> gi\u1eefa c\u00e1c g\u00f3i tin. Th\u1ebf n\u00ean, n\u1ebfu b\u1ea1n th\u1ea5y:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Stdev = 0.02 ms<\/strong>: \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 \u0111\u1ed9 l\u1ec7ch chu\u1ea9n gi\u1eefa c\u00e1c l\u1ea7n \u0111o \u0111\u1ed9 tr\u1ec5 l\u00e0 r\u1ea5t nh\u1ecf, ch\u1ec9 kho\u1ea3ng 0.02 ms, cho th\u1ea5y m\u1ea1ng r\u1ea5t \u1ed5n \u0111\u1ecbnh, kh\u00f4ng c\u00f3 bi\u1ebfn \u0111\u1ed9ng l\u1edbn.<\/li>\n\n\n\n<li><strong>Stdev = 0.07 ms<\/strong>: S\u1ef1 bi\u1ebfn \u0111\u1ed9ng gi\u1eefa c\u00e1c g\u00f3i tin l\u00e0 0.07 ms, v\u1eabn r\u1ea5t nh\u1ecf v\u00e0 cho th\u1ea5y k\u1ebft n\u1ed1i \u1ed5n \u0111\u1ecbnh.<\/li>\n\n\n\n<li><strong>Stdev = 0.05 ms<\/strong>: T\u01b0\u01a1ng t\u1ef1, \u0111\u1ed9 l\u1ec7ch chu\u1ea9n n\u00e0y c\u0169ng kh\u00e1 th\u1ea5p, ch\u1ec9 kho\u1ea3ng 0.05 ms, cho th\u1ea5y \u0111\u1ed9 tr\u1ec5 \u1ed5n \u0111\u1ecbnh.<\/li>\n<\/ul>\n\n\n\n<p>T\u00f3m l\u1ea1i, t\u1ea5t c\u1ea3 c\u00e1c gi\u00e1 tr\u1ecb n\u00e0y (0.02 ms, 0.07 ms, 0.05 ms) \u0111\u1ec1u l\u00e0 <strong>ms (milliseconds)<\/strong>, v\u00e0 ch\u00fang cho th\u1ea5y m\u1ea1ng c\u1ee7a b\u1ea1n \u0111ang ho\u1ea1t \u0111\u1ed9ng r\u1ea5t \u1ed5n \u0111\u1ecbnh v\u1edbi <strong>jitter th\u1ea5p<\/strong>.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u0110\u1ec3 ki\u1ec3m tra jitter (\u0111\u1ed9 bi\u1ebfn \u0111\u1ed9ng c\u1ee7a \u0111\u1ed9 tr\u1ec5) b\u1eb1ng c\u00f4ng c\u1ee5 MTR (My Traceroute), b\u1ea1n c\u00f3 th\u1ec3 l\u00e0m [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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