{"id":375,"date":"2024-07-08T05:28:29","date_gmt":"2024-07-08T05:28:29","guid":{"rendered":"https:\/\/the.2days.kr\/?p=375"},"modified":"2024-07-08T05:28:29","modified_gmt":"2024-07-08T05:28:29","slug":"%eb%84%a4%ed%8a%b8%ec%9b%8c%ed%81%ac-osi-%ec%b0%b8%ec%a1%b0-%eb%aa%a8%eb%8d%b8-7%ea%b3%84%ec%b8%b5osi-7-layer","status":"publish","type":"post","link":"https:\/\/the.2days.kr\/?p=375","title":{"rendered":"\ub124\ud2b8\uc6cc\ud06c OSI \ucc38\uc870 \ubaa8\ub378 7\uacc4\uce35(OSI 7 Layer)"},"content":{"rendered":"<div class=\"tt_article_useless_p_margin contents_style\">\n<p><figure class=\"imageblock alignCenter\" data-filename=\"1.png\" data-ke-mobilestyle=\"widthOrigin\" data-origin-height=\"516\" data-origin-width=\"560\" height=\"834\" width=\"906\">\n<span data-alt=\"OSI 7 Layer, \ucd9c\ucc98 : Profitap\" data-phocus=\"https:\/\/blog.kakaocdn.net\/dn\/ccHvvy\/btrd14WGs0K\/7LwJkNY5whUqofufxYj1K0\/img.png\" data-url=\"https:\/\/blog.kakaocdn.net\/dn\/ccHvvy\/btrd14WGs0K\/7LwJkNY5whUqofufxYj1K0\/img.png\"><br \/>\n<img loading=\"lazy\" decoding=\"async\" data-filename=\"1.png\" data-ke-mobilestyle=\"widthOrigin\" data-origin-height=\"516\" data-origin-width=\"560\" height=\"834\" onerror=\"this.onerror=null; this.src='\/\/t1.daumcdn.net\/tistory_admin\/static\/images\/no-image-v1.png'; this.srcset='\/\/t1.daumcdn.net\/tistory_admin\/static\/images\/no-image-v1.png';\" src=\"https:\/\/blog.kakaocdn.net\/dn\/ccHvvy\/btrd14WGs0K\/7LwJkNY5whUqofufxYj1K0\/img.png\" srcset=\"https:\/\/img1.daumcdn.net\/thumb\/R1280x0\/?scode=mtistory2&amp;fname=https%3A%2F%2Fblog.kakaocdn.net%2Fdn%2FccHvvy%2Fbtrd14WGs0K%2F7LwJkNY5whUqofufxYj1K0%2Fimg.png\" width=\"906\"\/><br \/>\n<\/span><figcaption>\n    OSI 7 Layer, \ucd9c\ucc98 : Profitap<br \/>\n   <\/figcaption><\/figure>\n<\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n<b><br \/>\n   [OSI \ucc38\uc870 \ubaa8\ub378]<br \/>\n  <\/b>\n<\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n  \ub124\ud2b8\uc6cc\ud06c\ub97c \uc124\uba85\ud558\uae30 \uc704\ud574\uc11c\ub294 OSI \ucc38\uc870 \ubaa8\ub378(Open Systems Interconnection Reference Model)\uc758 \uc774\ud574\uac00 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. OSI \ucc38\uc870 \ubaa8\ub378\uc740 1978\ub144 \uad6d\uc81c\ud1b5\uc2e0\uc5f0\ud569(ITU : International Telecommunication Union)\uc5d0\uc11c \uc624\ud508 \uc2dc\uc2a4\ud15c(Open System) \uac04 \ud1b5\uc2e0\uc744 \uc704\ud574 \ud544\uc694\ud55c \uae30\ub2a5\uc744 7 \uacc4\uce35\uc73c\ub85c \ub098\ub220 \uc11c\ube44\uc2a4(Service)\uc640 \ud504\ub85c\ud1a0\ucf5c(Protocol)\uc744 \uc815\uc758\ud55c \ubaa8\ub378\uc785\ub2c8\ub2e4. \uc624\ud508 \uc2dc\uc2a4\ud15c\uc774\ub780 \uc5b4\ub5a4 \ucef4\ud4e8\ud130\uac00 \ub2e8\ub3c5\uc73c\ub85c\ub9cc \uc0ac\uc6a9\ub418\ub294 \uac83\uc774 \uc544\ub2c8\ub77c, \ucef4\ud4e8\ud130 \ub124\ud2b8\uc6cc\ud06c\uc5d0 \uc5f0\uacb0\ub418\uc5b4 \ub2e4\ub978 \ucef4\ud4e8\ud130\uc640 \uc0c1\ud638 \ud1b5\uc2e0\ud560 \uc218 \uc788\ub294 \uc5ec\uac74\uc744 \uac16\ucd98 \ucef4\ud4e8\ud130\ub97c \ub9d0\ud569\ub2c8\ub2e4.\n <\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n<b><br \/>\n   [7 \uacc4\uce35]<br \/>\n  <\/b>\n<\/p>\n<p data-ke-size=\"size16\">\n  7 \uacc4\uce35\uc740 \uc544\ub798 \uacc4\uce35\ubd80\ud130 \ubb3c\ub9ac \uacc4\uce35(Physical Layer), \ub370\uc774\ud130\ub9c1\ud06c \uacc4\uce35(Data link Layer), \ub124\ud2b8\uc6cc\ud06c \uacc4\uce35(Network Layer), \uc804\uc1a1 \uacc4\uce35(Transport Layer), \uc138\uc158 \uacc4\uce35(Session Layer), \ud45c\ud604 \uacc4\uce35(Presentation Layer), \uc751\uc6a9 \uacc4\uce35(Application Layer)\uc73c\ub85c \uad6c\uc131\ub429\ub2c8\ub2e4. \uc774 \uc911 \ubb3c\ub9ac \uacc4\uce35, \ub370\uc774\ud130\ub9c1\ud06c \uacc4\uce35, \ub124\ud2b8\uc6cc\ud06c \uacc4\uce35\uc740 \ud558\uc704 \uacc4\uce35\uc73c\ub85c \ub124\ud2b8\uc6cc\ud06c \ud2b9\uc131\uc5d0\ub9cc \uc601\ud5a5\uc744 \ubc1b\uc9c0\ub9cc, \uc804\uc1a1 \uacc4\uce35, \uc138\uc158 \uacc4\uce35, \ud45c\ud604 \uacc4\uce35, \uc751\uc6a9 \uacc4\uce35\uc740 \uc0c1\uc704 \uacc4\uce35\uc73c\ub85c \ub124\ud2b8\uc6cc\ud06c \ud2b9\uc131\uc5d0 \uc601\ud5a5\uc744 \ubc1b\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4. \ub370\uc774\ud130\uc758 \uc804\uc1a1\uc740 \uc1a1\uc2e0 \uce21\uc758 \uacbd\uc6b0 \uc0c1\uc704 \uacc4\uce35\uc5d0\uc11c \ud558\uc704 \uacc4\uce35 \ubc29\ud5a5\uc73c\ub85c \uc774\ub8e8\uc5b4\uc9c0\uba70, \uc218\uc2e0 \uce21\uc758 \uacbd\uc6b0 \ubc18\ub300\ub85c \ud558\uc704 \uacc4\uce35\uc5d0\uc11c \uc0c1\uc704 \uacc4\uce35 \ubc29\ud5a5\uc73c\ub85c \uc774\ub8e8\uc5b4\uc9d1\ub2c8\ub2e4.\n <\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n<b><br \/>\n   OSI \ucc38\uc870 \ubaa8\ub378\uc758 \uac01 \uacc4\uce35\uc5d0 \ub300\ud558\uc5ec(OSI 7 \uacc4\uce35)<br \/>\n  <\/b>\n<\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n  1.<br \/>\n  <b><br \/>\n   \ubb3c\ub9ac \uacc4\uce35<br \/>\n  <\/b><br \/>\n  (Physical) : \ubb3c\ub9ac \uacc4\uce35\uc740 \uc1a1\uc218\uc2e0 \uc2dc\uc2a4\ud15c\uc758 \uc5f0\uacb0\uc5d0\uc11c \uae30\uacc4\uc801, \uc804\uae30\uc801 \ud2b9\uc131\uacfc \ubb3c\ub9ac\uc801\uc778 \uc2e0\ud638\uc758 \uc81c\uc5b4 \uc808\ucc28\uc758 \uae30\ub2a5\uc744 \uc815\uc758\ud569\ub2c8\ub2e4. \uae30\uacc4\uc801 \ud2b9\uc131\uc740 \uc804\uc1a1 \ub9e4\uccb4\uc758 \uc885\ub958, \ucee4\ub125\ud130\uc758 \ubaa8\uc591\uc774\ub098 \ud540 \uc218 \ub4f1\uc5d0 \ub300\ud55c \uac83\uc774\uba70, \uc804\uae30\uc801 \ud2b9\uc131\uc740 \uc1a1\uc218\uc2e0\ub418\ub294 \uc2e0\ud638\uc758 \uc804\uc555 \ub808\ubca8 \ub4f1\uc5d0 \ub300\ud55c \uac83\uc785\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uc2e0\ud638\uc758 \uc81c\uc5b4 \uc808\ucc28\ub294 \uc1a1\uc218\uc2e0 \uc2dc\uc2a4\ud15c \uac04 \uc5f0\uacb0 \uc81c\uc5b4\uc5d0 \ud544\uc694\ud55c \uc2e0\ud638 \uc81c\uc5b4 \uc808\ucc28\uc5d0 \ub300\ud55c \uac83\uc785\ub2c8\ub2e4.\n <\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n  2.<br \/>\n  <b><br \/>\n   \ub370\uc774\ud130\ub9c1\ud06c \uacc4\uce35<br \/>\n  <\/b><br \/>\n  (Data Link) : \ub370\uc774\ud130\ub9c1\ud06c \uacc4\uce35\uc740 \uc804\uc1a1\ub418\ub294 \ub370\uc774\ud130\uc758 \ubb3c\ub9ac\uc801 \uc804\uc1a1 \uc624\ub958\ub97c \uac10\uc9c0\ud558\uace0 \ubcf5\uad6c\ud558\ub294 \uc624\ub958 \uc81c\uc5b4 \uae30\ub2a5\uacfc \uc804\uc1a1\ub418\ub294 \ub370\uc774\ud130\uc758 \ud750\ub984\uc744 \uc870\uc808\ud558\ub294 \ud750\ub984 \uc81c\uc5b4 \uae30\ub2a5\uc744 \uc218\ud589\ud569\ub2c8\ub2e4. \uc2dc\uc2a4\ud15c \uac04\uc5d0 \ub370\uc774\ud130 \uc804\uc1a1 \uc2dc \uc5ec\ub7ec \uac00\uc9c0 \ud658\uacbd \uc694\uc778\uc5d0 \uc758\ud574 \uc7a1\uc74c(Noise)\uc774\ub098 \uac04\uc12d(Interference) \ub4f1\uc758 \ubb3c\ub9ac\uc801 \uc804\uc1a1 \uc624\ub958(Transmission Error)\uac00 \ubc1c\uc0dd\ud560 \uc218 \uc788\uc73c\ubbc0\ub85c \uc774\ub97c \ud574\uacb0\ud558\ub294 \uac83\uc774 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4. \uc624\ub958\uc758 \uc885\ub958\uc5d0\ub294 \uc1a1\uc2e0 \uce21\uc5d0\uc11c \uc804\uc1a1\ud55c \ub370\uc774\ud130\uac00 \uc218\uc2e0 \uce21\uc5d0 \ub3c4\ucc29\ud558\uc9c0 \ubabb\ud558\ub294 \ub370\uc774\ud130 \ubd84\uc2e4, \uc804\uc1a1 \uacfc\uc815\uc5d0\uc11c \ub370\uc774\ud130\uac00 \ubc14\ub00c\ub294 \ub370\uc774\ud130 \ubcc0\ud615 \ub4f1\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uc774\ub7ec\ud55c \uc624\ub958\uac00 \ubc1c\uc0dd\ud558\uba74 \uc1a1\uc2e0 \uce21\uc5d0\uc11c \uc7ac\uc804\uc1a1(Retransmission)\uc744 \uc2dc\ub3c4\ud558\uc5ec \uc624\ub958\ub97c \ubcf5\uad6c\ud558\uac8c \ub429\ub2c8\ub2e4.\n <\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n  3.<br \/>\n  <b><br \/>\n   \ub124\ud2b8\uc6cc\ud06c \uacc4\uce35<br \/>\n  <\/b><br \/>\n  (Network) : \ub124\ud2b8\uc6cc\ud06c \uacc4\uce35\uc740 \uc1a1\uc2e0 \uce21\uc5d0\uc11c \uc804\uc1a1\ud55c \ub370\uc774\ud130\uac00 \ub124\ud2b8\uc6cc\ud06c\uc5d0\uc11c \ucd5c\uc801\uc758 \uacbd\ub85c\ub85c \uc804\uc1a1\ub420 \uc218 \uc788\ub3c4\ub85d \uacbd\ub85c \ubc30\uc815\uacfc \ud63c\uc7a1 \uc81c\uc5b4\uc758 \uae30\ub2a5\uc744 \uc218\ud589\ud569\ub2c8\ub2e4. \uc989, \uc1a1\uc2e0 \uce21\uc5d0\uc11c \ub370\uc774\ud130\ub97c \uc804\uc1a1\ud558\uba74 \ub124\ud2b8\uc6cc\ud06c \uc7a5\ube44\uc778 \ub77c\uc6b0\ud130(Router)\uac00 \uc774\ub97c \uc218\uc2e0\ud558\uc5ec \uc218\uc2e0 \uce21\uae4c\uc9c0 \uac00\uc7a5 \ucd5c\uc801\uc758 \uacbd\ub85c\ub97c \ud0d0\uc0c9\ud569\ub2c8\ub2e4. \ub124\ud2b8\uc6cc\ud06c\uc758 \uacbd\ub85c\ub294 \uc5ec\ub7ec \uac00\uc9c0 \ud658\uacbd\uc801 \uc694\uc778\uc73c\ub85c \uc778\ud558\uc5ec \ud63c\uc7a1\ub3c4(Congestion)\uac00 \uc2dc\uac04\ub300\ubcc4\uc774\ub098 \uac01 \uad6c\uac04\ubcc4\ub85c \ub2ec\ub77c\uc9c8 \uc218\ub3c4 \uc788\uc73c\ubbc0\ub85c \ub124\ud2b8\uc6cc\ud06c \uacc4\uce35\uc774 \ub9e4\uc6b0 \uc911\uc694\ud569\ub2c8\ub2e4.\n <\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n  4.<br \/>\n  <b><br \/>\n   \uc804\uc1a1 \uacc4\uce35<br \/>\n  <\/b><br \/>\n  (Transport) : \uc804\uc1a1 \uacc4\uce35\uc740 \uc5f0\uacb0\ub41c \ub124\ud2b8\uc6cc\ud06c\uc758 \uae30\ub2a5\uc774\ub098 \ud2b9\uc131\uc5d0 \uc601\ud5a5\uc744 \ubc1b\uc9c0 \uc54a\uace0 \uc624\ub958 \uc81c\uc5b4, \ud750\ub984 \uc81c\uc5b4 \uae30\ub2a5\uc744 \uc218\ud589\ud558\uc5ec \uc2e0\ub8b0\uc131 \uc788\ub294 \ub370\uc774\ud130 \uc804\uc1a1\uc744 \ubcf4\uc7a5\ud569\ub2c8\ub2e4. \uc804\uc1a1 \uacc4\uce35\uc758 \uae30\ub2a5\uc740 \ub370\uc774\ud130\ub9c1\ud06c \uacc4\uce35\uc758 \uae30\ub2a5\uacfc \uc720\uc0ac\ud558\ub098 \uc804\uc1a1\uc758 \ucc45\uc784 \ubc94\uc704\uac00 \ub2e4\ub985\ub2c8\ub2e4. \ub370\uc774\ud130\ub9c1\ud06c \uacc4\uce35\uc758 \uc804\uc1a1 \ucc45\uc784 \ubc94\uc704\ub294 \uc1a1\uc218\uc2e0 \uc2dc\uc2a4\ud15c\uc758 \uac01 \uad6c\uac04\uc774\uc9c0\ub9cc, \uc804\uc1a1 \uacc4\uce35\uc758 \uc804\uc1a1 \ucc45\uc784 \ubc94\uc704\ub294 \ucd5c\ucd08 \uc1a1\uc2e0 \uc2dc\uc2a4\ud15c\uc5d0\uc11c\ubd80\ud130 \ucd5c\uc885 \uc218\uc2e0 \uc2dc\uc2a4\ud15c\uae4c\uc9c0 \uc804\uccb4 \uad6c\uac04\uc785\ub2c8\ub2e4.\n <\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n  5.<br \/>\n  <b><br \/>\n   \uc138\uc158 \uacc4\uce35<br \/>\n  <\/b><br \/>\n  (Session) : \uc138\uc158 \uacc4\uce35\uc740 \uc1a1\uc218\uc2e0 \ucef4\ud4e8\ud130\uc758 \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8 \uac04 \ub124\ud2b8\uc6cc\ud06c \ub300\ud654 \uc81c\uc5b4 \ubc0f \ub3d9\uae30\ud654(Synchronization) \uc720\uc9c0 \uae30\ub2a5\uc744 \uc218\ud589\ud569\ub2c8\ub2e4. \ub124\ud2b8\uc6cc\ud06c \ub300\ud654 \uc81c\uc5b4\ub294 \ub370\uc774\ud130\ub97c \uc1a1\uc218\uc2e0\ud560 \ub54c \ud1b5\uc2e0 \ubc29\uc2dd\uc744 \uacb0\uc815\ud558\ub294 \uae30\ub2a5\uc73c\ub85c \ub300\ud654 \uc81c\uc5b4 \ud611\uc0c1\uc744 \ud1b5\ud574 \uacb0\uc815\ud569\ub2c8\ub2e4. \ub3d9\uae30\ud654\ub294 \ub370\uc774\ud130\ub97c \uc1a1\uc218\uc2e0\ud560 \ub54c \ub370\uc774\ud130\uc758 \uc804\uc1a1 \uc21c\uc11c \ubc0f \ub3d9\uae30\uc810(Synchronization Point)\uc758 \uc704\uce58\ub97c \ubd80\uc5ec\ud558\uc5ec \uc804\uc1a1 \ub3c4\uc911 \ubc1c\uc0dd\ud558\ub294 \uc624\ub958\uc5d0 \ub300\ud558\uc5ec \ub370\uc774\ud130\ub97c \uc7ac\uc804\uc1a1\ud558\uac70\ub098 \ubcf5\uad6c\ud558\ub294 \uae30\ub2a5\uc785\ub2c8\ub2e4.\n <\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n  6.<br \/>\n  <b><br \/>\n   \ud45c\ud604 \uacc4\uce35<br \/>\n  <\/b><br \/>\n  (Presentation) : \ud45c\ud604 \uacc4\uce35\uc740 \uc1a1\uc218\uc2e0 \ucef4\ud4e8\ud130\uc758 \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8 \uac04 \uc1a1\uc218\uc2e0\ub418\ub294 \ub370\uc774\ud130\uc758 \uad6c\ubb38(Syntax)\uacfc \uc758\ubbf8(Semantics)\uc5d0 \uad00\ub828\ub41c \uae30\ub2a5\uc73c\ub85c \ubcc0\ud658(Translation), \uc554\ud638\ud654(Encryption), \uc555\ucd95(Compression)\uc744 \uc218\ud589\ud569\ub2c8\ub2e4. \ubcc0\ud658\uc740 \ub2e4\ub978 \ubd80\ud638\ud654 \ubc29\uc2dd\uc744 \uc0ac\uc6a9\ud558\ub294 \uc1a1\uc218\uc2e0 \uc2dc\uc2a4\ud15c \uac04\uc758 \uc0c1\ud638 \ud638\ud658\uc131\uc744 \uc81c\uacf5\ud558\uae30 \uc704\ud558\uc5ec \uc804\uc1a1 \ub370\uc774\ud130\uc758 \ubd80\ud638\ub97c \ud1b5\uc77c\uc2dc\ud0a4\ub294 \uae30\ub2a5\uc774\uba70, \uc554\ud638\ud654\ub294 \ub370\uc774\ud130\ub97c \ubcf4\ud638\ud558\uae30 \uc704\ud574 \uc554\ud638\ud654 \uc54c\uace0\ub9ac\uc998\uc73c\ub85c \ub370\uc774\ud130\ub97c \ubcc0\uc870\ud558\ub294 \uae30\ub2a5\uc785\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \uc555\ucd95\uc740 \uc81c\ud55c\ub41c \ub124\ud2b8\uc6cc\ud06c\uc758 \uc804\uc1a1 \ud6a8\uc728\uc744 \ub192\uc774\uae30 \uc704\ud574 \ubb38\uc790, \uc624\ub514\uc624, \ube44\ub514\uc624 \ub4f1\uc758 \uba40\ud2f0\ubbf8\ub514\uc5b4 \ub370\uc774\ud130\uc758 \ube44\ud2b8 \uc218\ub97c \uc904\uc5ec \uc804\uc1a1\ud558\ub294 \uae30\ub2a5\uc785\ub2c8\ub2e4.\n <\/p>\n<p data-ke-size=\"size16\">\n<p data-ke-size=\"size16\">\n  7.<br \/>\n  <b><br \/>\n   \uc751\uc6a9 \uacc4\uce35<br \/>\n  <\/b><br \/>\n  (Application) : \uc751\uc6a9 \uacc4\uce35\uc740 \ucd5c\uc0c1\uc704 \uacc4\uce35\uc73c\ub85c \uc0ac\uc6a9\uc790\uc758 \ub370\uc774\ud130 \ucc98\ub9ac\ub97c \ub3c4\uc640\uc90d\ub2c8\ub2e4. \ub610\ud55c \uc0ac\uc6a9\uc790\uc640 \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8 \uc0ac\uc774\uc5d0\uc11c \ub370\uc774\ud130 \uc1a1\uc218\uc2e0\uc744 \ucc98\ub9ac\ud558\uba70, \ub370\uc774\ud130 \uc1a1\uc218\uc2e0\uc744 \ub2f4\ub2f9\ud558\ub294 \ud504\ub85c\ud1a0\ucf5c\uc744 \ud3ec\ud568\ud569\ub2c8\ub2e4. \uc0ac\uc6a9\uc790\uc758 \ub370\uc774\ud130 \ucc98\ub9ac\ub97c \ub3c4\uc640\uc8fc\ub294 \uc608\ub85c\ub294 \uc6cc\ub4dc\ud504\ub85c\uc138\uc11c(Word), \uc5d1\uc140(Excel) \ub4f1\uc758 \ud504\ub85c\uadf8\ub7a8\uc774 \uc788\uace0, \uc0ac\uc6a9\uc790\uc640 \uc751\uc6a9 \ud504\ub85c\uadf8\ub7a8 \uc0ac\uc774\uc5d0\uc11c \ub370\uc774\ud130 \uc1a1\uc218\uc2e0\uc744 \ucc98\ub9ac\ud558\ub294 \uc11c\ube44\uc2a4\ub85c\ub294 \ud154\ub137(Telnet) \ub4f1\uc774 \uc788\uc2b5\ub2c8\ub2e4. \uadf8\ub9ac\uace0 \ub370\uc774\ud130 \uc1a1\uc218\uc2e0\uc744 \ub2f4\ub2f9\ud558\ub294 \ud504\ub85c\ud1a0\ucf5c\uc5d0\ub294 \uc804\uc790\uba54\uc77c \ud504\ub85c\ud1a0\ucf5c(SMTP), \ud30c\uc77c \uc804\uc1a1 \ud504\ub85c\ud1a0\ucf5c(FTP), \ud558\uc774\ud37c\ud14d\uc2a4\ud2b8 \uc804\uc1a1 \ud504\ub85c\ud1a0\ucf5c(HTTP) \ub4f1\uc774 \uc788\uc2b5\ub2c8\ub2e4.\n <\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>OSI 7 Layer, \ucd9c\ucc98 : Profitap [OSI \ucc38\uc870 \ubaa8\ub378] \ub124\ud2b8\uc6cc\ud06c\ub97c \uc124\uba85\ud558\uae30 \uc704\ud574\uc11c\ub294 OSI \ucc38\uc870 \ubaa8\ub378(Open Systems Interconnection Reference Model)\uc758 \uc774\ud574\uac00 \ud544\uc218\uc801\uc785\ub2c8\ub2e4. OSI \ucc38\uc870 \ubaa8\ub378\uc740 1978\ub144 \uad6d\uc81c\ud1b5\uc2e0\uc5f0\ud569(ITU : International Telecommunication Union)\uc5d0\uc11c \uc624\ud508 \uc2dc\uc2a4\ud15c(Open System) \uac04 \ud1b5\uc2e0\uc744 \uc704\ud574 \ud544\uc694\ud55c \uae30\ub2a5\uc744 7 \uacc4\uce35\uc73c\ub85c \ub098\ub220 \uc11c\ube44\uc2a4(Service)\uc640 \ud504\ub85c\ud1a0\ucf5c(Protocol)\uc744 \uc815\uc758\ud55c \ubaa8\ub378\uc785\ub2c8\ub2e4. \uc624\ud508 \uc2dc\uc2a4\ud15c\uc774\ub780 \uc5b4\ub5a4 \ucef4\ud4e8\ud130\uac00 \ub2e8\ub3c5\uc73c\ub85c\ub9cc \uc0ac\uc6a9\ub418\ub294 \uac83\uc774 \uc544\ub2c8\ub77c, \ucef4\ud4e8\ud130 \ub124\ud2b8\uc6cc\ud06c\uc5d0&#8230;<\/p>\n","protected":false},"author":1,"featured_media":374,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_kadence_starter_templates_imported_post":false,"_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"footnotes":""},"categories":[17],"tags":[],"_links":{"self":[{"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/posts\/375"}],"collection":[{"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=375"}],"version-history":[{"count":1,"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/posts\/375\/revisions"}],"predecessor-version":[{"id":376,"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/posts\/375\/revisions\/376"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=\/wp\/v2\/media\/374"}],"wp:attachment":[{"href":"https:\/\/the.2days.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=375"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=375"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/the.2days.kr\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=375"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}