{"id":1414,"date":"2019-04-22T10:42:12","date_gmt":"2019-04-22T03:42:12","guid":{"rendered":"https:\/\/blog.tinohost.com\/?p=1414"},"modified":"2025-06-11T14:02:30","modified_gmt":"2025-06-11T07:02:30","slug":"fqdn-la-gi","status":"publish","type":"post","link":"https:\/\/tino.vn\/blog\/fqdn-la-gi\/","title":{"rendered":"FQDN l\u00e0 g\u00ec? FQDN c\u00f3 c\u1ea7n thi\u1ebft kh\u00f4ng?"},"content":{"rendered":"\n

\u1ede nh\u1eefng b\u00e0i vi\u1ebft tr\u01b0\u1edbc, ch\u00fang ta \u0111\u00e3 t\u00ecm hi\u1ec3u v\u1ec1 t\u00ean mi\u1ec1n v\u1edbi nhi\u1ec1u thu\u1eadt ng\u1eef li\u00ean quan nh\u01b0 hostname<\/a>, DNS<\/a>, … Trong b\u00e0i vi\u1ebft n\u00e0y, Tino Group s\u1ebd gi\u1edbi thi\u1ec7u \u0111\u1ebfn b\u1ea1n thu\u1eadt ng\u1eef th\u01b0\u1eddng g\u1eb7p khi nh\u1eafc \u0111\u1ebfn t\u00ean mi\u1ec1n: FQDN. V\u1eady FQDN l\u00e0 g\u00ec? FQDN c\u00f3 c\u1ea7n thi\u1ebft kh\u00f4ng?<\/strong><\/p>\n\n\n\n

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

\u0110\u1ecbnh ngh\u0129a FQDN<\/strong><\/h3>\n\n\n\n

FQDN l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a c\u1ee5m t\u1eeb ti\u1ebfng Anh Fully Qualified Domain Name<\/strong> (t\u1ea1m d\u1ecbch: T\u00ean mi\u1ec1n ho\u00e0n to\u00e0n \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n<\/em> ). \u0110\u00e2y l\u00e0 m\u1ed9t \u0111\u1ecba ch\u1ec9 \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a c\u00e1c trang web, m\u00e1y t\u00ednh v\u00e0 c\u00e1c th\u1ef1c th\u1ec3 kh\u00e1c c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c truy c\u1eadp tr\u00ean Internet, FQDN \u0111\u01b0\u1ee3c vi\u1ebft b\u1eb1ng t\u00ean m\u00e1y ch\u1ee7<\/a> v\u00e0 t\u00ean mi\u1ec1n<\/a>. Ngo\u00e0i ra, v\u00ec FQDN cung c\u1ea5p \u0111\u01b0\u1eddng d\u1eabn tuy\u1ec7t \u0111\u1ed1i c\u1ee7a m\u00e1y ch\u1ee7 n\u00ean c\u0169ng c\u00f3 t\u00ean g\u1ecdi kh\u00e1c l\u00e0 t\u00ean mi\u1ec1n tuy\u1ec7t \u0111\u1ed1i.<\/strong><\/p>\n\n\n\n

FQDN \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong b\u1ea5t k\u1ef3 t\u01b0\u01a1ng t\u00e1c n\u00e0o tr\u00ean Internet v\u00e0 b\u1edfi c\u00e1c ph\u1ea7n m\u1edf r\u1ed9ng tr\u00ean b\u1ea5t k\u1ef3 m\u1ea1ng IP n\u00e0o. Th\u00f4ng qua qu\u00e1 tr\u00ecnh ph\u00e2n gi\u1ea3i DNS, FQDN b\u1ed5 sung m\u1ed9t m\u1ee9c \u0111\u1ed9 tr\u1eebu t\u01b0\u1ee3ng gi\u1eefa t\u00ean d\u1ecbch v\u1ee5 v\u00e0 \u0111\u1ecba ch\u1ec9 IP hi\u1ec7u qu\u1ea3 c\u1ee7a t\u00e0i nguy\u00ean l\u01b0u tr\u1eef d\u1ecbch v\u1ee5. Ngo\u00e0i ra, FQDN c\u00f2n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho b\u1ea5t k\u1ef3 lo\u1ea1i b\u1ea3n ghi DNS n\u00e0o, v\u00ed d\u1ee5: b\u1ea3n ghi TXT c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi FQDN.<\/p>\n\n\n\n

C\u00e1c lo\u1ea1i m\u00e1y t\u00ednh kh\u00e1c nhau \u0111\u00f4i khi s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt ng\u1eef kh\u00e1c nhau cho FQDN.<\/p>\n\n\n

\n
\"fqdn-la-gi\"
FQDN l\u00e0 g\u00ec?<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n

C\u00fa ph\u00e1p c\u1ee7a FQDN<\/strong><\/h3>\n\n\n\n

FQDN l\u00e0 m\u1ed9t \u0111\u1ecba ch\u1ec9 ho\u00e0n ch\u1ec9nh cho m\u1ed9t trang web, m\u00e1y t\u00ednh, m\u00e1y ch\u1ee7 ho\u1eb7c th\u1ef1c th\u1ec3 t\u01b0\u01a1ng t\u1ef1 t\u1ed3n t\u1ea1i tr\u00ean internet.<\/p>\n\n\n\n

M\u1ed9t FQDN bao g\u1ed3m ba ph\u1ea7n: t\u00ean m\u00e1y ch\u1ee7, t\u00ean mi\u1ec1n c\u1ea5p hai v\u00e0 t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t<\/a> (TLD), m\u1ed7i ph\u1ea7n \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ch\u1ea5m, k\u1ebft th\u00fac b\u1eb1ng d\u1ea5u ch\u1ea5m. Theo th\u1ee9 t\u1ef1 \u0111\u00f3, FQDN c\u00f3 c\u00fa ph\u00e1p nh\u01b0 sau: – [t\u00ean m\u00e1y ch\u1ee7]. [mi\u1ec1n]. [tld]<\/strong>. V\u00ed d\u1ee5: http:\/\/www.yahoo.com. , http:\/\/mail.yahoo.com.<\/p>\n\n\n

\n
\"cu-phap-cua-fqdn\"
C\u00fa ph\u00e1p c\u1ee7a FQDN<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n

T\u1ea1i sao n\u00ean s\u1eed d\u1ee5ng FQDN?<\/strong><\/h3>\n\n\n\n

T\u00ean mi\u1ec1n \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 thu\u1eadn ti\u1ec7n, nh\u01b0ng ch\u1ec9 trong m\u1ed9t s\u1ed1 ng\u1eef c\u1ea3nh nh\u1ea5t \u0111\u1ecbnh.<\/p>\n\n\n\n

    \n
  • FQDN s\u1ebd ch\u1ec9 \u0111\u1ecbnh v\u1ecb tr\u00ed ch\u00ednh x\u00e1c c\u1ee7a m\u1ed9t m\u00e1y ch\u1ee7 trong DNS.<\/li>\n\n\n\n
  • FQDN s\u1ebd gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng tham kh\u1ea3o t\u00ean m\u00e1y ch\u1ee7 m\u00e0 kh\u00f4ng tham chi\u1ebfu \u0111\u1ebfn to\u00e0n b\u1ed9 t\u00ean mi\u1ec1n ho\u00e0n to\u00e0n \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n. Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, t\u00ean mi\u1ec1n \u0111\u00e3 \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn \u1edf n\u01a1i kh\u00e1c. Ch\u00ednh v\u00ec th\u1ebf, ch\u1ec9 c\u00f3 t\u00ean m\u00e1y ch\u1ee7 l\u00e0 c\u1ea7n thi\u1ebft cho m\u1ed9t nhi\u1ec7m v\u1ee5 c\u1ee5 th\u1ec3.<\/li>\n\n\n\n
  • M\u1ed9t tr\u01b0\u1eddng h\u1ee3p c\u1ea7n thi\u1ebft \u0111\u1ec3 b\u1ea1n s\u1eed d\u1ee5ng FQDN l\u00e0 khi b\u1ea1n mu\u1ed1n l\u1ea5y ch\u1ee9ng ch\u1ec9 SSL.<\/li>\n\n\n\n
  • FQDN c\u00f2n gi\u00fap b\u1ea1n truy c\u1eadp c\u00e1c d\u1ecbch v\u1ee5 mi\u1ec1n nh\u01b0 Giao th\u1ee9c truy\u1ec1n t\u1ec7p (FTP) v\u00e0 email. V\u00ed d\u1ee5: n\u1ebfu b\u1ea1n mu\u1ed1n k\u1ebft n\u1ed1i email t\u00ean mi\u1ec1n v\u1edbi m\u1ed9t \u1ee9ng d\u1ee5ng email tr\u00ean \u0111i\u1ec7n tho\u1ea1i c\u1ee7a m\u00ecnh theo c\u00e1ch th\u1ee7 c\u00f4ng, b\u1ea1n c\u0169ng c\u1ea7n bi\u1ebft FQDN cho m\u00e1y ch\u1ee7 th\u01b0, c\u00f3 th\u1ec3 tr\u00f4ng gi\u1ed1ng nh\u01b0 \u201cmail.yourdomainname.com\u201d.<\/li>\n<\/ul>\n\n\n\n

    V\u00ed d\u1ee5: Trong b\u1ea3n ghi DNS, qu\u1ea3n tr\u1ecb vi\u00ean c\u00f3 th\u1ec3 tham chi\u1ebfu \u0111\u1ebfn t\u00ean mi\u1ec1n ho\u00e0n to\u00e0n \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n nh\u01b0 en.wikipedia.org ho\u1eb7c ch\u1ec9 r\u00fat ng\u1eafn v\u00e0 s\u1eed d\u1ee5ng t\u00ean m\u00e1y ch\u1ee7 c\u1ee7a vi<\/strong>. Khi \u0111\u01b0\u1ee3c r\u00fat ng\u1eafn, ph\u1ea7n c\u00f2n l\u1ea1i c\u1ee7a h\u1ec7 th\u1ed1ng s\u1ebd hi\u1ec3u r\u1eb1ng trong b\u1ed1i c\u1ea3nh c\u1ee5 th\u1ec3 \u0111\u00f3, vi<\/strong> \u0111\u1ec1 c\u1eadp \u0111\u1ebfn en.wikipedia.org<\/strong>.<\/p>\n\n\n

    \n
    \"loi-ich-cua-viec-su-dung-fqdn\"
    L\u1ee3i \u00edch c\u1ee7a vi\u1ec7c s\u1eed d\u1ee5ng FQDN<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n

    FQDN c\u00f3 g\u00ec kh\u00e1c so v\u1edbi PQDN?<\/strong><\/h2>\n\n\n\n

    S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa FQDN v\u00e0 PQDN<\/strong><\/h3>\n\n\n\n

    Nh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u1edf tr\u00ean, FQDN l\u00e0 t\u00ean mi\u1ec1n \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n <\/strong>. <\/p>\n\n\n\n

    Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, “\u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n<\/strong>” c\u00f3 ngh\u0129a l\u00e0 “\u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh<\/strong>” v\u00ec v\u1ecb tr\u00ed \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh th\u1ec3 hi\u1ec7n r\u00f5 trong t\u00ean mi\u1ec1n. N\u1ebfu t\u00ean mi\u1ec1n kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh, ch\u00fang s\u1ebd \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 PQDN (t\u00ean mi\u1ec1n kh\u00f4ng \u0111\u1ee7 \u0111i\u1ec1u ki\u1ec7n) v\u00ec m\u1ed9t t\u00ean mi\u1ec1n kh\u00f4ng \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh \u0111\u1ea7y \u0111\u1ee7.<\/p>\n\n\n\n

    M\u1ed9t FQDN cung c\u1ea5p \u0111\u01b0\u1eddng d\u1eabn tuy\u1ec7t \u0111\u1ed1i \u0111\u1ea7y \u0111\u1ee7 c\u1ee7a m\u00e1y ch\u1ee7. Trong khi \u0111\u00f3, PQDN ch\u1ec9 cung c\u1ea5p m\u1ed9t t\u00ean t\u01b0\u01a1ng \u0111\u1ed1i l\u00e0 m\u1ed9t ph\u1ea7n nh\u1ecf c\u1ee7a t\u00ean mi\u1ec1n \u0111\u1ea7y \u0111\u1ee7. PQDN kh\u00f4ng b\u1eaft bu\u1ed9c \u0111\u1ec3 l\u01b0u tr\u1eef c\u00e1c trang web, nh\u01b0ng ch\u00fang gi\u00fap kh\u00e1ch truy c\u1eadp trang web t\u00ecm th\u1ea5y trang c\u1ee7a b\u1ea1n d\u1ec5 d\u00e0ng h\u01a1n. Ngo\u00e0i ra, h\u1ea7u h\u1ebft ng\u01b0\u1eddi d\u00f9ng \u0111\u1ec1u mong \u0111\u1ee3i PQDN, ngay c\u1ea3 khi h\u1ecd kh\u00f4ng bi\u1ebft ch\u00fang l\u00e0 g\u00ec ho\u1eb7c kh\u00f4ng hi\u1ec3u ch\u00fang ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o.<\/p>\n\n\n\n

    V\u00ed d\u1ee5: www.microsoft.com. l\u00e0 FQDN v\u00e0 microsoft.com l\u00e0 PQDN<\/p>\n\n\n

    \n
    \"su-khac-biet-giua-fqdn-va-pqdn\"
    S\u1ef1 kh\u00e1c bi\u1ec7t gi\u1eefa FQDN v\u00e0 PQDN<\/strong><\/figcaption><\/figure>\n<\/div>\n\n\n

    C\u00e1ch t\u00ecm FQDN nh\u01b0 th\u1ebf n\u00e0o?<\/strong><\/h3>\n\n\n\n

    B\u1ea1n c\u00f3 th\u1ec3 th\u1ef1c hi\u1ec7n tra c\u1ee9u FQDN tr\u00ean m\u00e1y t\u00ednh c\u1ee7a m\u00ecnh v\u1edbi b\u1ea5t k\u1ef3 h\u1ec7 \u0111i\u1ec1u h\u00e0nh ph\u1ed5 bi\u1ebfn n\u00e0o.<\/p>\n\n\n\n

      \n
    • Windows 10:<\/strong> B\u1ea1n h\u00e3y v\u00e0o \u201cb\u1ea3ng \u0111i\u1ec1u khi\u1ec3n\u201d<\/strong> v\u00e0 nh\u1ea5p v\u00e0o \u201ch\u1ec7 th\u1ed1ng\u201d<\/strong>. T\u1ea1i \u0111\u00e2y, b\u1ea1n s\u1ebd th\u1ea5y FQDN b\u00ean c\u1ea1nh \u201cT\u00ean m\u00e1y t\u00ednh \u0111\u1ea7y \u0111\u1ee7\u201d<\/strong>.<\/li>\n\n\n\n
    • MacOS:<\/strong> B\u1ea1n h\u00e3y m\u1edf terminal<\/strong>, nh\u1eadp \u201chostname \u2013f\u201d<\/strong> r\u1ed3i nh\u1ea5n n\u00fat enter<\/strong>. Khi \u0111\u00f3, b\u1ea1n s\u1ebd th\u1ea5y FQDN.<\/li>\n\n\n\n
    • Linux:<\/strong> t\u01b0\u01a1ng t\u1ef1 nh\u01b0 MacOS, b\u1ea1n h\u00e3y m\u1edf terminal<\/strong> nh\u01b0ng h\u00e3y g\u00f5 \u201ct\u00ean m\u00e1y \u2013A\u201d<\/strong> \u0111\u1ec3 t\u00ecm FQDN<\/li>\n<\/ul>\n\n\n\n

      T\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c t\u1ed3n t\u1ea1i d\u01b0\u1edbi nhi\u1ec1u \u0111\u1ecbnh d\u1ea1ng. V\u00ec v\u1eady, b\u1ea1n c\u1ea7n hi\u1ec3u r\u00f5 v\u1ec1 ch\u00fang \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ean mi\u1ec1n m\u00e0 b\u1ea1n \u0111ang s\u1edf h\u1eefu l\u00e0 h\u1ee3p ph\u00e1p, kh\u00f4ng b\u1ecb gi\u1edbi h\u1ea1n ho\u1ea1t \u0111\u1ed9ng. Hy v\u1ecdng m\u1ed9t s\u1ed1 th\u00f4ng tin c\u1ea7n thi\u1ebft v\u1ec1 FQDN tr\u00ean \u0111\u00e2y s\u1ebd l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c b\u1ed5 \u00edch d\u00e0nh cho b\u1ea1n.<\/p>\n\n\n\n

      Nh\u1eefng c\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p<\/strong><\/h2>\n\n\n\t\t\n\t\t\t\t

      Kh\u00f4ng c\u1ea7n nh\u1eadp t\u00ean m\u00e1y ch\u1ee7 c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o trang web kh\u00f4ng?<\/h2>\t\t\t\t
      \n\t\t\t\t\t\t
      \n\t\t\t\t\n\n

      T\u00ean m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh FQDN. Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p, b\u1ea1n kh\u00f4ng c\u1ea7n nh\u1eadp t\u00ean m\u00e1y ch\u1ee7 v\u1eabn c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o website. V\u00ed d\u1ee5: B\u1ea1n ch\u1ec9 c\u1ea7n nh\u1eadp Google.com m\u00e0 kh\u00f4ng c\u1ea7n nh\u1eadp www.google.com \u0111\u1ec3 c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o trang Google.<\/p>\n\n\n\n

      Tuy nhi\u00ean, \u0111\u00f4i l\u00fac b\u1ea1n c\u0169ng c\u1ea7n ph\u1ea3i nh\u1eadp t\u00ean m\u00e1y ch\u1ee7 m\u1edbi c\u00f3 th\u1ec3 truy c\u1eadp ch\u00ednh x\u00e1c \u0111\u1ecba ch\u1ec9 m\u00ecnh c\u1ea7n.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\n\t\t\t\t

      PQDN d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<\/h2>\t\t\t\t
      \n\t\t\t\t\t\t
      \n\t\t\t\t\n\n

      PQDN \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong m\u1ed9t s\u1ed1 b\u1ed1i c\u1ea3nh nh\u1ea5t \u0111\u1ecbnh. Ch\u00fang d\u00e0nh cho c\u00e1c t\u00ecnh hu\u1ed1ng \u0111\u1eb7c bi\u1ec7t nh\u01b0 h\u1ed7 tr\u1ee3 cho vi\u1ec7c tham chi\u1ebfu hostname d\u1ec5 d\u00e0ng h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n tham kh\u1ea3o to\u00e0n b\u1ed9 FQDN<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\n\t\t\t\t

      B\u1ea3n ghi DNS l\u00e0 g\u00ec?<\/h2>\t\t\t\t
      \n\t\t\t\t\t\t
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      DNS l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Domain Name System<\/strong>, t\u1ea1m dich: h\u1ec7 th\u1ed1ng ph\u00e2n gi\u1ea3i t\u00ean mi\u1ec1n<\/strong>, l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng gi\u00fap con ng\u01b0\u1eddi v\u00e0 m\u00e1y t\u00ednh giao ti\u1ebfp v\u1edbi nhau d\u1ec5 d\u00e0ng h\u01a1n. Con ng\u01b0\u1eddi s\u1eed d\u1ee5ng t\u00ean, c\u00f2n m\u00e1y t\u00ednh s\u1ebd s\u1eed d\u1ee5ng s\u1ed1, DNS l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng gi\u00fap bi\u00ean d\u1ecbch t\u00ean hostname (t\u00ean mi\u1ec1n) th\u00e0nh s\u1ed1 \u0111\u1ec3 m\u00e1y t\u00ednh c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01b0\u1ee3c. DNS t\u01b0\u01a1ng t\u1ef1 nh\u01b0 \u1ee9ng d\u1ee5ng Danh B\u1ea1 tr\u00ean \u0111i\u1ec7n tho\u1ea1i c\u1ee7a b\u1ea1n<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\n\t\t\t\t

      M\u1ed9t FQDN c\u00f3 y\u00eau c\u1ea7u ph\u1ea3i \u0111\u1ea7y \u0111\u1ee7 3 ph\u1ea7n kh\u00f4ng?<\/h2>\t\t\t\t
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      Nh\u01b0 \u0111\u00e3 chia s\u1ebb, c\u1ea5u tr\u00fac c\u1ee7a m\u1ed9t FQDN g\u1ed3m 3 ph\u1ea7n l\u00e0: t\u00ean m\u00e1y ch\u1ee7, t\u00ean mi\u1ec1n c\u1ea5p hai v\u00e0 t\u00ean mi\u1ec1n c\u1ea5p cao nh\u1ea5t (TLD). N\u1ebfu thi\u1ebfu 1 trong 3, t\u00ean mi\u1ec1n \u0111\u00f3 s\u1ebd kh\u00f4ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 FQDN. B\u00ean c\u1ea1nh \u0111\u00f3, c\u00e1c FQDN c\u00f2n y\u00eau c\u1ea7u m\u1ed9t d\u1ea5u ch\u1ea5m \u1edf cu\u1ed1i, v\u00ed d\u1ee5 www.microsoft.com. s\u1ebd l\u00e0 c\u00e1ch nh\u1eadp FQDN \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn.<\/p>\n\n\t\t\t<\/div>\n\t\t<\/div>\n\t\t<\/section>\n\t\t\n