Ngay c\u1ea3 \u1edf nh\u1eefng c\u00f4ng tr\u00ecnh nh\u1ecf h\u01a1n, n\u00f3 v\u1eabn c\u00f3 gi\u00e1 tr\u1ecb: vi\u1ec7c l\u1eafp \u0111\u1eb7t c\u00f3 th\u1ec3 \u0111\u01a1n gi\u1ea3n h\u01a1n, v\u00e0 h\u1ec7 th\u1ed1ng th\u01b0\u1eddng s\u1ebd g\u1ecdn g\u00e0ng h\u01a1n v\u00e0 d\u1ec5 d\u00e0ng b\u1ea3o tr\u00ec h\u01a1n.<\/p>\n
![\"\"](\"https:\/\/bas-ip.com\/wp-content\/uploads\/2026\/03\/5_Are-There-Any-Limitations.png\")
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Nh\u1eefng g\u00ec b\u1ea1n c\u1ea7n ki\u1ec3m tra tr\u01b0\u1edbc<\/h2>\n
PoE r\u1ea5t h\u1eefu \u00edch, nh\u01b0ng \u0111i\u1ec1u \u0111\u00f3 kh\u00f4ng c\u00f3 ngh\u0129a l\u00e0 m\u1ecdi thi\u1ebft b\u1ecb IP \u0111\u1ec1u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n qua c\u00e1p m\u1ea1ng m\u00e0 kh\u00f4ng c\u1ea7n suy t\u00ednh th\u00eam.<\/p>\n
Th\u1ee9 nh\u1ea5t, b\u1ea3n th\u00e2n thi\u1ebft b\u1ecb \u0111\u00f3 ph\u1ea3i h\u1ed7 tr\u1ee3 PoE. Th\u1ee9 hai, b\u1ea1n c\u1ea7n bi\u1ebft n\u00f3 y\u00eau c\u1ea7u ti\u00eau chu\u1ea9n PoE v\u00e0 m\u1ee9c c\u00f4ng su\u1ea5t n\u00e0o. Th\u1ee9 ba, b\u1ed9 chuy\u1ec3n m\u1ea1ch ho\u1eb7c b\u1ed9 b\u01a1m ngu\u1ed3n (injector) c\u0169ng ph\u1ea3i \u0111\u00e1p \u1ee9ng c\u00e1c y\u00eau c\u1ea7u \u0111\u00f3. Ngay c\u1ea3 khi b\u1ea1n \u0111ang xem x\u00e9t m\u1ed9t th\u01b0\u01a1ng hi\u1ec7u c\u1ee5 th\u1ec3, ch\u1eb3ng h\u1ea1n nh\u01b0 BAS-IP, kh\u1ea3 n\u0103ng h\u1ed7 tr\u1ee3 PoE v\u00e0 y\u00eau c\u1ea7u v\u1ec1 ngu\u1ed3n \u0111i\u1ec7n v\u1eabn c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m tra theo t\u1eebng model. B\u1ea1n kh\u00f4ng th\u1ec3 m\u1eb7c \u0111\u1ecbnh r\u1eb1ng m\u1ecdi b\u1ea3ng g\u1ecdi IP ho\u1eb7c m\u1ecdi m\u00e0n h\u00ecnh trong nh\u00e0 trong c\u00f9ng m\u1ed9t th\u01b0\u01a1ng hi\u1ec7u \u0111\u1ec1u \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n theo c\u00f9ng m\u1ed9t c\u00e1ch.<\/p>\n
C\u0169ng c\u1ea7n nh\u1edb r\u1eb1ng kh\u00f4ng ph\u1ea3i m\u1ecdi ph\u1ea7n c\u1ee7a h\u1ec7 th\u1ed1ng nh\u1ea5t thi\u1ebft \u0111\u1ec1u \u0111\u01b0\u1ee3c c\u1ea5p ngu\u1ed3n theo c\u00f9ng m\u1ed9t c\u00e1ch. M\u1ed9t thi\u1ebft b\u1ecb c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng qua PoE, trong khi thi\u1ebft b\u1ecb kh\u00e1c c\u00f3 th\u1ec3 v\u1eabn y\u00eau c\u1ea7u b\u1ed9 ngu\u1ed3n ri\u00eang.<\/p>\n
C\u00f3 b\u1ea5t k\u1ef3 h\u1ea1n ch\u1ebf n\u00e0o kh\u00f4ng?<\/h2>\n
C\u00f3. Gi\u1ed1ng nh\u01b0 b\u1ea5t k\u1ef3 gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt n\u00e0o, PoE c\u0169ng c\u00f3 nh\u1eefng gi\u1edbi h\u1ea1n.<\/p>\n
PoE kh\u00f4ng lo\u1ea1i b\u1ecf nhu c\u1ea7u ph\u1ea3i t\u00ednh to\u00e1n v\u1ec1 ch\u1ea5t l\u01b0\u1ee3ng m\u1ea1ng, chi\u1ec1u d\u00e0i c\u00e1p, t\u1ed5ng c\u00f4ng su\u1ea5t ngu\u1ed3n (power budget) v\u00e0 kh\u1ea3 n\u0103ng t\u01b0\u01a1ng th\u00edch c\u1ee7a thi\u1ebft b\u1ecb. N\u1ebfu c\u00f4ng tr\u00ecnh ph\u1ee9c t\u1ea1p, h\u1ec7 th\u1ed1ng v\u1eabn ph\u1ea3i \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u00fang c\u00e1ch thay v\u00ec coi nh\u01b0 m\u1ed9t s\u1ee3i c\u00e1p s\u1ebd t\u1ef1 gi\u1ea3i quy\u1ebft m\u1ecdi th\u1ee9.<\/p>\n
N\u00f3i c\u00e1ch kh\u00e1c, PoE l\u00e0m \u0111\u01a1n gi\u1ea3n h\u00f3a h\u1ec7 th\u1ed1ng, nh\u01b0ng n\u00f3 kh\u00f4ng thay th\u1ebf cho c\u00e1c gi\u1ea3i ph\u00e1p k\u1ef9 thu\u1eadt b\u00e0i b\u1ea3n.<\/p>\n
Khi n\u00e0o PoE th\u1ef1c s\u1ef1 c\u00f3 \u00fd ngh\u0129a<\/h2>\n
PoE \u0111\u1eb7c bi\u1ec7t h\u1eefu \u00edch khi h\u1ec7 th\u1ed1ng chu\u00f4ng c\u1eeda c\u00f3 h\u00ecnh IP \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng nh\u01b0 m\u1ed9t ph\u1ea7n c\u1ee7a h\u1ea1 t\u1ea7ng m\u1ea1ng r\u1ed9ng l\u1edbn h\u01a1n c\u1ee7a m\u1ed9t c\u00f4ng tr\u00ecnh. \u0110\u00f3 c\u00f3 th\u1ec3 l\u00e0 v\u0103n ph\u00f2ng, t\u00f2a nh\u00e0 chung c\u01b0, b\u1ea5t \u0111\u1ed9ng s\u1ea3n th\u01b0\u01a1ng m\u1ea1i ho\u1eb7c m\u1ed9t ng\u00f4i nh\u00e0 ri\u00eang hi\u1ec7n \u0111\u1ea1i.<\/p>\n
C\u00e0ng c\u00f3 nhi\u1ec1u thi\u1ebft b\u1ecb m\u1ea1ng trong h\u1ec7 th\u1ed1ng, gi\u00e1 tr\u1ecb c\u1ee7a n\u00f3 c\u00e0ng tr\u1edf n\u00ean r\u00f5 r\u00e0ng: gi\u1ea3m b\u1edbt nhu c\u1ea7u v\u1ec1 c\u00e1c b\u1ed9 ngu\u1ed3n ri\u00eang bi\u1ec7t v\u00e0 c\u00e1c \u0111\u01b0\u1eddng d\u00e2y \u0111i\u1ec7n b\u1ed5 sung.<\/p>\n
N\u1ebfu b\u1ea1n mu\u1ed1n phi\u00ean b\u1ea3n ng\u1eafn g\u1ecdn<\/h2>\n
PoE l\u00e0 vi\u1ec7c truy\u1ec1n t\u1ea3i ngu\u1ed3n \u0111i\u1ec7n v\u00e0 d\u1eef li\u1ec7u qua m\u1ed9t s\u1ee3i c\u00e1p Ethernet duy nh\u1ea5t.<\/p>\n
\u0110\u1ed1i v\u1edbi chu\u00f4ng c\u1eeda c\u00f3 h\u00ecnh IP, n\u00f3 h\u1eefu \u00edch v\u00ec gi\u00fap \u0111\u01a1n gi\u1ea3n h\u00f3a vi\u1ec7c l\u1eafp \u0111\u1eb7t, l\u00e0m cho h\u1ec7 th\u1ed1ng g\u1ecdn g\u00e0ng h\u01a1n, gi\u00fap t\u1eadp trung ngu\u1ed3n \u0111i\u1ec7n v\u00e0 ph\u00f9 h\u1ee3p m\u1ed9t c\u00e1ch t\u1ef1 nhi\u00ean v\u1edbi ki\u1ebfn tr\u00fac d\u1ef1a tr\u00ean m\u1ea1ng.<\/p>\n\n\n
<\/p>","protected":false},"excerpt":{"rendered":"
\u00dd ngh\u0129a c\u1ee7a PoE theo c\u00e1ch hi\u1ec3u \u0111\u01a1n gi\u1ea3n PoE l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Power over Ethernet. N\u00f3i m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n, \u0111i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0 c\u00f9ng m\u1ed9t s\u1ee3i c\u00e1p Ethernet c\u00f3 th\u1ec3 truy\u1ec1n t\u1ea3i c\u1ea3 d\u1eef li\u1ec7u v\u00e0 ngu\u1ed3n \u0111i\u1ec7n. \u0110i\u1ec1u \u0111\u00f3 c\u00f3 ngh\u0129a l\u00e0, \u0111\u1ed1i v\u1edbi m\u1ed9t s\u1ed1 thi\u1ebft b\u1ecb, b\u1ea1n kh\u00f4ng […]<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[48],"tags":[],"class_list":["post-163338","post","type-post","status-publish","format-standard","hentry","category-uncategorized-vi"],"acf":[],"_links":{"self":[{"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/posts\/163338","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/comments?post=163338"}],"version-history":[{"count":2,"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/posts\/163338\/revisions"}],"predecessor-version":[{"id":165647,"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/posts\/163338\/revisions\/165647"}],"wp:attachment":[{"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/media?parent=163338"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/categories?post=163338"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/bas-ip.com\/vi\/wp-json\/wp\/v2\/tags?post=163338"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}