{"id":2562,"date":"2024-05-18T22:44:24","date_gmt":"2024-05-18T19:44:24","guid":{"rendered":"https:\/\/www.techhacks.gr\/?p=2562"},"modified":"2024-05-18T22:44:25","modified_gmt":"2024-05-18T19:44:25","slug":"%cf%84%ce%b1-%ce%b5%cf%80%ce%af%cf%80%ce%b5%ce%b4%ce%b1-%cf%84%ce%bf%cf%85-%ce%bc%ce%bf%ce%bd%cf%84%ce%ad%ce%bb%ce%bf%cf%85-osi","status":"publish","type":"post","link":"https:\/\/www.techhacks.gr\/?p=2562","title":{"rendered":"\u03a4\u03b1 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf\u03c5 OSI"},"content":{"rendered":"\n<p>\u03a4\u03bf <strong>\u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2 OSI<\/strong> (\u0391\u03bd\u03bf\u03b9\u03ba\u03c4\u03ae\u03c2 \u0394\u03b9\u03b1\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7\u03c2 \u03a3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd) \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03b4\u03b9\u03b1\u03c3\u03c4\u03c1\u03c9\u03bc\u03b1\u03c4\u03c9\u03bc\u03ad\u03bd\u03b7, \u03b1\u03c6\u03b7\u03c1\u03b7\u03bc\u03ad\u03bd\u03b7 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03c3\u03c7\u03b5\u03b4\u03af\u03b1\u03c3\u03b7 \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03b1\u03ba\u03ce\u03bd \u03ba\u03b1\u03b9 \u03b4\u03b9\u03ba\u03c4\u03c5\u03b1\u03ba\u03ce\u03bd \u03c0\u03c1\u03c9\u03c4\u03bf\u03ba\u03cc\u03bb\u03bb\u03c9\u03bd. <br>\u03a7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03b5\u03af\u03c4\u03b1\u03b9 \u03ba\u03c5\u03c1\u03af\u03c9\u03c2 \u03c3\u03ae\u03bc\u03b5\u03c1\u03b1 \u03c9\u03c2 \u03b5\u03c1\u03b3\u03b1\u03bb\u03b5\u03af\u03bf \u03b4\u03b9\u03b4\u03b1\u03c3\u03ba\u03b1\u03bb\u03af\u03b1\u03c2. \u0394\u03b9\u03b1\u03b9\u03c1\u03b5\u03af \u03b5\u03bd\u03bd\u03bf\u03b9\u03bf\u03bb\u03bf\u03b3\u03b9\u03ba\u03ac \u03c4\u03b7\u03bd \u03b1\u03c1\u03c7\u03b9\u03c4\u03b5\u03ba\u03c4\u03bf\u03bd\u03b9\u03ba\u03ae \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5 \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ce\u03bd \u03c3\u03b5 7 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03c3\u03b5 \u03bc\u03b9\u03b1 \u03bb\u03bf\u03b3\u03b9\u03ba\u03ae \u03b5\u03be\u03ad\u03bb\u03b9\u03be\u03b7, \u03ba\u03ac\u03b8\u03b5 \u03ad\u03bd\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03bf\u03c0\u03bf\u03af\u03b1 \u03b5\u03ba\u03c4\u03b5\u03bb\u03b5\u03af \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b5\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u03a6\u03c5\u03c3\u03b9\u03ba\u03cc \u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf<\/strong>: \u0391\u03bd\u03b1\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9 \u03c4\u03b7 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae \u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ce\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0396\u03b5\u03cd\u03be\u03b7\u03c2 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/strong>: \u03a7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03be\u03b9\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c6\u03c5\u03c3\u03b9\u03ba\u03bf\u03cd \u03bc\u03ad\u03c3\u03bf\u03c5.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0394\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5<\/strong>: \u03a5\u03c0\u03b5\u03cd\u03b8\u03c5\u03bd\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03c1\u03bf\u03bc\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03bd\u03c4\u03b1\u03bb\u03bb\u03b1\u03b3\u03ae \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u039c\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2<\/strong>: \u03a0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03b1\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03a3\u03c5\u03bd\u03b5\u03b4\u03c1\u03af\u03b1\u03c2<\/strong>: \u0394\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03c3\u03c5\u03bd\u03b5\u03b4\u03c1\u03af\u03b5\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03a0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1\u03c3\u03b7\u03c2<\/strong>: \u03a7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b7 \u03bc\u03bf\u03c1\u03c6\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03ba\u03c1\u03c5\u03c0\u03c4\u03bf\u03b3\u03c1\u03ac\u03c6\u03b7\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae\u03c2<\/strong>: \u03a0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03af\u03b5\u03c2 \u03c3\u03b5 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03ba\u03b1\u03b9 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b5\u03c2.<\/li>\n<\/ol>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cf-assets.www.cloudflare.com\/slt3lc6tev37\/6ZH2Etm3LlFHTgmkjLmkxp\/59ff240fb3ebdc7794ffaa6e1d69b7c2\/osi_model_7_layers.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u03a4\u03b1 \u03ba\u03b1\u03c4\u03ce\u03c4\u03b5\u03c1\u03b1 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03b1\u03c3\u03c7\u03bf\u03bb\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ac \u03c3\u03ae\u03bc\u03b1\u03c4\u03b1, \u03ba\u03bf\u03bc\u03bc\u03ac\u03c4\u03b9\u03b1 \u03b4\u03c5\u03b1\u03b4\u03b9\u03ba\u03ce\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03ba\u03b1\u03b9 \u03b4\u03c1\u03bf\u03bc\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7 \u03b1\u03c5\u03c4\u03ce\u03bd \u03c4\u03c9\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c3\u03c4\u03b1 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1. <br>\u03a4\u03b1 \u03c5\u03c8\u03b7\u03bb\u03cc\u03c4\u03b5\u03c1\u03b1 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03ba\u03b1\u03bb\u03cd\u03c0\u03c4\u03bf\u03c5\u03bd \u03b1\u03b9\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03ba\u03b1\u03b9 \u03b1\u03c0\u03bf\u03ba\u03c1\u03af\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5, \u03b1\u03bd\u03b1\u03c0\u03b1\u03c1\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c0\u03c1\u03c9\u03c4\u03cc\u03ba\u03bf\u03bb\u03bb\u03b1 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5, \u03cc\u03c0\u03c9\u03c2 \u03c6\u03b1\u03af\u03bd\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7 \u03c3\u03ba\u03bf\u03c0\u03b9\u03ac \u03c4\u03bf\u03c5 \u03c7\u03c1\u03ae\u03c3\u03c4\u03b7.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u03a0\u03bf\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03b7 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 \u03ba\u03ac\u03b8\u03b5 \u03b5\u03c0\u03b9\u03c0\u03ad\u03b4\u03bf\u03c5;<\/h2>\n\n\n\n<p>\u03a4\u03bf <strong>\u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2 OSI<\/strong> \u03c5\u03c0\u03bf\u03b4\u03b9\u03b1\u03b9\u03c1\u03b5\u03af \u03c4\u03b9\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2 \u03b5\u03bd\u03cc\u03c2 \u03c4\u03b7\u03bb\u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03b1\u03ba\u03bf\u03cd \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5 \u03c3\u03b5 \u03bc\u03b9\u03b1 \u201c\u03ba\u03b1\u03c4\u03b1\u03ba\u03cc\u03c1\u03c5\u03c6\u03b7\u201d \u03c3\u03c4\u03bf\u03af\u03b2\u03b1 \u03b1\u03c0\u03cc \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1, \u03b3\u03b9\u03b1 \u03c4\u03bf \u03ba\u03b1\u03b8\u03ad\u03bd\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03bf\u03c0\u03bf\u03af\u03b1 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03bf\u03c1\u03b9\u03c3\u03c4\u03b5\u03af \u03ba\u03ac\u03c0\u03bf\u03b9\u03bf \u03c0\u03c1\u03c9\u03c4\u03cc\u03ba\u03bf\u03bb\u03bb\u03bf \u03c3\u03b5 \u03bc\u03af\u03b1 \u03c3\u03c5\u03b3\u03ba\u03b5\u03ba\u03c1\u03b9\u03bc\u03ad\u03bd\u03b7 \u03c5\u03bb\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7. \u039a\u03ac\u03b8\u03b5 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03b1\u03be\u03b9\u03bf\u03c0\u03bf\u03b9\u03b5\u03af \u03c4\u03b9\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2 \u03c4\u03bf\u03c5 \u03ba\u03b1\u03c4\u03ce\u03c4\u03b5\u03c1\u03bf\u03cd \u03c4\u03bf\u03c5 \u03c3\u03c4\u03b7 \u03c3\u03c4\u03bf\u03af\u03b2\u03b1 \u03b5\u03c0\u03b9\u03c0\u03ad\u03b4\u03bf\u03c5, \u03b5\u03bd\u03ce \u03c3\u03c4\u03cc\u03c7\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03b5\u03af\u03bd\u03b1\u03b9 \u03bd\u03b1 \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03b9\u03ba\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c3\u03c4\u03bf \u03b1\u03bc\u03ad\u03c3\u03c9\u03c2 \u03b1\u03bd\u03ce\u03c4\u03b5\u03c1\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03cc \u03c4\u03bf\u03c5. \u0391\u03c2 \u03b4\u03bf\u03cd\u03bc\u03b5 \u03c4\u03b7 \u03c3\u03b7\u03bc\u03b1\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 \u03ba\u03ac\u03b8\u03b5 \u03b5\u03c0\u03b9\u03c0\u03ad\u03b4\u03bf\u03c5:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><th><\/th><th>\u039c\u03bf\u03bd\u03ac\u03b4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/th><th>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf<\/th><th>\u039b\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1<\/th><\/tr><tr><th rowspan=\"4\">\u039b\u03bf\u03b3\u03b9\u03c3\u03bc\u03b9\u03ba\u03cc<br><\/th><td rowspan=\"3\">\u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1<\/td><td>7. \u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd<\/td><td><small>\u03a0\u03b1\u03c1\u03ad\u03c7\u03b5\u03c4\u03b1\u03b9 \u03c3\u03c4\u03b9\u03c2 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2 \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7 \u03c3\u03c4\u03bf \u03b4\u03af\u03ba\u03c4\u03c5\u03bf<\/small><\/td><\/tr><tr><td>6. \u03a0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1\u03c3\u03b7\u03c2<\/td><td><small>\u0391\u03bd\u03b1\u03c0\u03b1\u03c1\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03ba\u03b1\u03b9 \u03ba\u03c1\u03c5\u03c0\u03c4\u03bf\u03b3\u03c1\u03ac\u03c6\u03b7\u03c3\u03b7<\/small><\/td><\/tr><tr><td>5. \u03a3\u03c5\u03bd\u03cc\u03b4\u03bf\u03c5<\/td><td><small>\u0388\u03bb\u03b5\u03b3\u03c7\u03bf\u03c2 \u03c4\u03bf\u03c5 \u03b4\u03b9\u03b1\u03bb\u03cc\u03b3\u03bf\u03c5 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03c9\u03bd \u03ac\u03ba\u03c1\u03c9\u03bd \u03c4\u03b7\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2<\/small><\/td><\/tr><tr><td>\u03a4\u03bc\u03ae\u03bc\u03b1<\/td><td>4. \u039c\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2<\/td><td><small>\u0391\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 \u03b1\u03c0\u03cc \u03ac\u03ba\u03c1\u03bf \u03c3\u03b5 \u03ac\u03ba\u03c1\u03bf<\/small><\/td><\/tr><tr><th rowspan=\"3\">\u03a5\u03bb\u03b9\u03ba\u03cc<\/th><td>\u03a0\u03b1\u03ba\u03ad\u03c4\u03bf<\/td><td>3. \u0394\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5<\/td><td><small>\u039a\u03b1\u03b8\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2 \u03b4\u03b9\u03b1\u03b4\u03c1\u03bf\u03bc\u03ce\u03bd \u03ba\u03b1\u03b9 \u03bb\u03bf\u03b3\u03b9\u03ba\u03ce\u03bd \u03b4\u03b9\u03b5\u03c5\u03b8\u03cd\u03bd\u03c3\u03b5\u03c9\u03bd \u03c4\u03c9\u03bd \u03ba\u03cc\u03bc\u03b2\u03c9\u03bd \u03c3\u03c4\u03b1 \u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03b1 \u03b5\u03bd\u03cc\u03c2 \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5<\/small><\/td><\/tr><tr><td>\u03a0\u03bb\u03b1\u03af\u03c3\u03b9\u03bf<\/td><td>2. \u0396\u03b5\u03cd\u03be\u03b7\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/td><td><small>\u03a6\u03c5\u03c3\u03b9\u03ba\u03ae \u03b4\u03b9\u03b5\u03c5\u03b8\u03c5\u03bd\u03c3\u03b9\u03bf\u03b4\u03cc\u03c4\u03b7\u03c3\u03b7 (MAC &amp; LLC)<\/small><\/td><\/tr><tr><td>Bit<\/td><td>1. \u03a6\u03c5\u03c3\u03b9\u03ba\u03cc<\/td><td><small>\u0394\u03c5\u03b1\u03b4\u03b9\u03ba\u03ae \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7 \u03c3\u03ae\u03bc\u03b1\u03c4\u03bf\u03c2 \u03bc\u03ad\u03c3\u03c9 \u03c4\u03bf\u03c5 \u03c6\u03c5\u03c3\u03b9\u03ba\u03bf\u03cd \u03bc\u03ad\u03c3\u03bf\u03c5<\/small><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>\u03a6\u03c5\u03c3\u03b9\u03ba\u03cc \u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf<\/strong>: \u0391\u03bd\u03b1\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9 \u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac \u03c4\u03c9\u03bd bits (\u03b4\u03c5\u03b1\u03b4\u03b9\u03ba\u03ce\u03bd \u03c8\u03b7\u03c6\u03af\u03c9\u03bd) \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ce\u03bd. \u03a0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03b5\u03b9 \u03c4\u03bf \u03c6\u03c5\u03c3\u03b9\u03ba\u03cc \u03bc\u03ad\u03c3\u03bf \u03c0\u03bf\u03c5 \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03b5\u03b9 \u03c4\u03b7\u03bd \u03ba\u03af\u03bd\u03b7\u03c3\u03b7 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b4\u03cd\u03bf \u03ba\u03cc\u03bc\u03b2\u03c9\u03bd (\u03c0.\u03c7. \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ce\u03bd, smartphones).<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0396\u03b5\u03cd\u03be\u03b7\u03c2 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/strong>: \u03a7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03be\u03b9\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03c4\u03bf\u03c5 \u03c6\u03c5\u03c3\u03b9\u03ba\u03bf\u03cd \u03bc\u03ad\u03c3\u03bf\u03c5. \u0395\u03c0\u03b9\u03b2\u03bb\u03ad\u03c0\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03c3\u03bc\u03b1\u03c4\u03b9\u03ba\u03ae \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b3\u03b5\u03b9\u03c4\u03bf\u03bd\u03b9\u03ba\u03ce\u03bd \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ce\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0394\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5<\/strong>: \u03a5\u03c0\u03b5\u03cd\u03b8\u03c5\u03bd\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03b4\u03c1\u03bf\u03bc\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03bd\u03c4\u03b1\u03bb\u03bb\u03b1\u03b3\u03ae \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b4\u03b9\u03b1\u03c6\u03bf\u03c1\u03b5\u03c4\u03b9\u03ba\u03ce\u03bd \u03b4\u03b9\u03ba\u03c4\u03cd\u03c9\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u039c\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2<\/strong>: \u03a0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03b1\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03b7 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ce\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03a3\u03c5\u03bd\u03b5\u03b4\u03c1\u03af\u03b1\u03c2<\/strong>: \u0394\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03c3\u03c5\u03bd\u03b5\u03b4\u03c1\u03af\u03b5\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c3\u03c5\u03c3\u03ba\u03b5\u03c5\u03ce\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03a0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1\u03c3\u03b7\u03c2<\/strong>: \u03a7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c4\u03b7 \u03bc\u03bf\u03c1\u03c6\u03bf\u03c0\u03bf\u03af\u03b7\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03ba\u03c1\u03c5\u03c0\u03c4\u03bf\u03b3\u03c1\u03ac\u03c6\u03b7\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.<\/li>\n\n\n\n<li><strong>\u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae\u03c2<\/strong>: \u03a0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03af\u03b5\u03c2<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">\u039a\u03cd\u03c1\u03b9\u03bf \u03bb\u03ae\u03bc\u03bc\u03b1 \u03b3\u03b9\u03b1 \u03ba\u03ac\u03b8\u03b5 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u03a4\u03bf \u03c6\u03c5\u03c3\u03b9\u03ba\u03cc \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1<\/strong> (\u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 1) &#8211; \u03bc\u03ad\u03c3\u03bf, \u200b\u200b\u03c3\u03ae\u03bc\u03b1 \u03ba\u03b1\u03b9 \u03b4\u03c5\u03b1\u03b4\u03b9\u03ba\u03ae \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7. \u03a0\u03b1\u03c1\u03b1\u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03b1 \u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03c5\u03bd \u03ba\u03cc\u03bc\u03b2\u03bf\u03c5\u03c2, \u03b5\u03c0\u03b1\u03bd\u03b1\u03bb\u03ae\u03c0\u03c4\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03ba\u03b1\u03bb\u03ce\u03b4\u03b9\u03b1 Ethernet. \u03a4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03bc\u03b5\u03c4\u03b1\u03b4\u03af\u03b4\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03b7\u03bb\u03b5\u03ba\u03c4\u03c1\u03b9\u03ba\u03ae \u03c4\u03ac\u03c3\u03b7, \u03c1\u03b1\u03b4\u03b9\u03bf\u03c3\u03c5\u03c7\u03bd\u03cc\u03c4\u03b7\u03c4\u03b5\u03c2, \u03c5\u03c0\u03ad\u03c1\u03c5\u03b8\u03c1\u03bf \u03ae \u03b1\u03c0\u03bb\u03cc \u03c6\u03c9\u03c2.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cf-assets.www.cloudflare.com\/slt3lc6tev37\/1HQ1W5P4XAinIdM37DTu4U\/900ccdceda346baf03ce8b9f977d2974\/osi_model_physical_layer_1.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u03a3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7\u03c2 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/strong> (\u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf 2) &#8211; \u03a0\u03c1\u03cc\u03ba\u03b5\u03b9\u03c4\u03b1\u03b9 \u03b3\u03b9\u03b1 \u03c4\u03bf \u03c0\u03b9\u03bf \u03c0\u03b5\u03c1\u03af\u03c0\u03bb\u03bf\u03ba\u03bf \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf\u03c5 OSI \u03ba\u03b1\u03b9 \u03bc\u03b5\u03c1\u03b9\u03ba\u03ad\u03c2 \u03c6\u03bf\u03c1\u03ad\u03c2 \u03c7\u03c9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c3\u03b5 \u03b4\u03cd\u03bf \u03bc\u03ad\u03c1\u03b7: \u03ad\u03bd\u03b1 \u03b3\u03b9\u03b1 \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf \u03c0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03c0\u03bf\u03bb\u03c5\u03bc\u03ad\u03c3\u03c9\u03bd \u03ba\u03b1\u03b9 \u03ad\u03bd\u03b1 \u03b3\u03b9\u03b1 \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf \u03bb\u03bf\u03b3\u03b9\u03ba\u03ae\u03c2 \u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7\u03c2.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cf-assets.www.cloudflare.com\/slt3lc6tev37\/3TLHavXiotb9ayyZFKECf3\/9456d1c431cd71ceea7f4b407f076f11\/data_link_layer_osi_model.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u03a3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5<\/strong> (\u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf 3) &#8211; \u039a\u03b1\u03b8\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc\u03c2 \u03b4\u03b9\u03b1\u03b4\u03c1\u03bf\u03bc\u03ae\u03c2, IP \u03ba\u03b1\u03b9 \u03b4\u03c1\u03bf\u03bc\u03bf\u03bb\u03cc\u03b3\u03b7\u03c3\u03b7\u03c2. \u03a4\u03bf Layer 3 \u03bc\u03bf\u03c1\u03c6\u03bf\u03c0\u03bf\u03b9\u03b5\u03af \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c9\u03c2 \u03c0\u03b1\u03ba\u03ad\u03c4\u03b1. \u03a3\u03c4\u03c1\u03ad\u03c6\u03b5\u03b9 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03c4\u03b7 \u03c3\u03c9\u03c3\u03c4\u03ae \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae \u03b4\u03b9\u03b1\u03b4\u03c1\u03bf\u03bc\u03ae.<strong>\u03a3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03bc\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2<\/strong> (\u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 4) &#8211; \u03a3\u03c5\u03bd\u03b4\u03ad\u03c3\u03b5\u03b9\u03c2 \u03b1\u03c0\u03cc \u03ac\u03ba\u03c1\u03bf \u03c3\u03b5 \u03ac\u03ba\u03c1\u03bf \u03ba\u03b1\u03b9 \u03b1\u03be\u03b9\u03bf\u03c0\u03b9\u03c3\u03c4\u03af\u03b1. \u038c\u03c0\u03c9\u03c2 \u03c5\u03c0\u03bf\u03b4\u03b7\u03bb\u03ce\u03bd\u03b5\u03b9 \u03c4\u03bf \u03cc\u03bd\u03bf\u03bc\u03b1, \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03bc\u03b5\u03c4\u03b1\u03ba\u03b9\u03bd\u03b5\u03af \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03b5 \u03c3\u03c5\u03bd\u03b4\u03ad\u03c3\u03b5\u03b9\u03c2 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5, \u03c3\u03c5\u03bd\u03ae\u03b8\u03c9\u03c2 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03ce\u03bd\u03c4\u03b1\u03c2 TCP. \u0395\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03b5\u03b9 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03c4\u03b7\u03bd \u03b1\u03bd\u03ac\u03ba\u03c4\u03b7\u03c3\u03b7 \u03c3\u03c6\u03b1\u03bb\u03bc\u03ac\u03c4\u03c9\u03bd \u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2 \u03b5\u03c0\u03b1\u03bd\u03b5\u03ba\u03c0\u03bf\u03bc\u03c0\u03ad\u03c2.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cf-assets.www.cloudflare.com\/slt3lc6tev37\/3g2Hv0frHsql5SFauJL5EG\/d8cede7b6a780e63413bd86de9eee7f9\/osi_model_network_layer_3.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u03a3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03c0\u03b5\u03c1\u03b9\u03cc\u03b4\u03bf\u03c5 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1\u03c2<\/strong> (\u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf 5) &#8211; \u0395\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 Interhost. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03b4\u03b9\u03b1\u03c7\u03b5\u03b9\u03c1\u03af\u03b6\u03b5\u03c4\u03b1\u03b9 \u03c0\u03bf\u03bb\u03bb\u03bf\u03cd\u03c2 \u03c4\u03cd\u03c0\u03bf\u03c5\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03b9\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c3\u03c4\u03ad\u03bb\u03bd\u03b5\u03b9 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03b5 \u03bb\u03bf\u03b3\u03b9\u03ba\u03ad\u03c2 \u03b8\u03cd\u03c1\u03b5\u03c2, \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03b1\u03bd\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03b5\u03ba\u03b5\u03af\u03bd\u03c9\u03bd \u03c0\u03bf\u03c5 \u03c7\u03c1\u03b7\u03c3\u03b9\u03bc\u03bf\u03c0\u03bf\u03b9\u03bf\u03cd\u03bd \u03c4\u03bf NFS \u03ba\u03b1\u03b9 \u03c4\u03bf SQL.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cf-assets.www.cloudflare.com\/slt3lc6tev37\/29mRrgK22AqJVlg2MMlD86\/34d8f4071b6cc0d3b03c93f55e4d89b7\/osi_model_session_layer_5.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u03a4\u03bf \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1\u03c3\u03b7\u03c2<\/strong> (\u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 6) &#8211; \u0391\u03bd\u03c4\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03ba\u03b1\u03b9 \u03ba\u03c1\u03c5\u03c0\u03c4\u03bf\u03b3\u03c1\u03ac\u03c6\u03b7\u03c3\u03b7 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd, \u03c3\u03c5\u03bc\u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03b1\u03bd\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03c4\u03c1\u03bf\u03c0\u03ce\u03bd \u03bc\u03bf\u03c1\u03c6\u03ae\u03c2. \u03a3\u03ba\u03b5\u03c6\u03c4\u03b5\u03af\u03c4\u03b5 \u03b1\u03c5\u03c4\u03cc \u03c4\u03bf \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03c9\u03c2 \u03bc\u03b5\u03c4\u03b1\u03c6\u03c1\u03b1\u03c3\u03c4\u03ae\u03c2. \u03a4\u03b1 \u03c0\u03b1\u03c1\u03b1\u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03b1 \u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03c5\u03bd \u03c4\u03b1 ASCII, TIFF, JPEG, MIDI \u03ba\u03b1\u03b9 MPEG.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cf-assets.www.cloudflare.com\/slt3lc6tev37\/19L86neKKT8srUkOSe4rf7\/ff4c91c94a1790651df7b48433913f59\/osi_model_presentation_layer_6.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u03a3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae\u03c2<\/strong> (\u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf 7) &#8211; \u0394\u03b9\u03b1\u03b4\u03b9\u03ba\u03b1\u03c3\u03af\u03b1 \u03b4\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5 \u03c0\u03c1\u03bf\u03c2 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae. \u0391\u03c5\u03c4\u03cc \u03c4\u03bf \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 \u03c4\u03b5\u03bb\u03b9\u03ba\u03bf\u03cd \u03c7\u03c1\u03ae\u03c3\u03c4\u03b7 \u03c0\u03b1\u03ba\u03b5\u03c4\u03ac\u03c1\u03b5\u03b9 \u03c4\u03b1 \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c0\u03bf\u03c5 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03bd\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf Layer \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1\u03c3\u03b7\u03c2 \u03c3\u03c4\u03b7 \u03bc\u03bf\u03c1\u03c6\u03ae \u03c0\u03bf\u03c5 \u03b1\u03c0\u03b1\u03b9\u03c4\u03b5\u03af\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03b7\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03ae \u03c4\u03b7 \u03b4\u03b9\u03b1\u03b4\u03b9\u03ba\u03b1\u03c3\u03af\u03b1 \u03c4\u03bf\u03c5 \u03c4\u03b5\u03bb\u03b9\u03ba\u03bf\u03cd \u03c7\u03c1\u03ae\u03c3\u03c4\u03b7 \u03c0\u03bf\u03c5 \u03c4\u03b7 \u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9. \u03a0\u03b1\u03c1\u03b1\u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03b1 \u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03bf\u03c5\u03bd \u03c0\u03c1\u03bf\u03b3\u03c1\u03ac\u03bc\u03bc\u03b1\u03c4\u03b1 \u03c0\u03b5\u03c1\u03b9\u03ae\u03b3\u03b7\u03c3\u03b7\u03c2, SMTP, HTTP \u03ba\u03b1\u03b9 FTP. \u0391\u03c5\u03c4\u03ae \u03b7 \u03c3\u03c4\u03c1\u03ce\u03c3\u03b7 \u03b4\u03b7\u03bc\u03b9\u03bf\u03c5\u03c1\u03b3\u03b5\u03af \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03b1\u03c5\u03c4\u03ac \u03c0\u03bf\u03c5 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03c3\u03c4\u03b1\u03bb\u03bf\u03cd\u03bd \u03c0\u03af\u03c3\u03c9 \u03c3\u03c4\u03bf Layer \u03c0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1\u03c3\u03b7\u03c2.<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img data-recalc-dims=\"1\" decoding=\"async\" src=\"https:\/\/i0.wp.com\/cf-assets.www.cloudflare.com\/slt3lc6tev37\/2rcDKpr4WLqoyAZ7GDKkyJ\/7cab96402de7ac5465b86e617da3da4e\/osi_model_application_layer_7.png?w=640&#038;ssl=1\" alt=\"\"\/><\/figure>\n\n\n\n<p>\u03a4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf OSI \u03c4\u03c5\u03c0\u03bf\u03c0\u03bf\u03b9\u03ae\u03b8\u03b7\u03ba\u03b5 \u03c9\u03c2 \u03c0\u03c1\u03cc\u03c4\u03c5\u03c0\u03bf ISO 7498-1 \u03ba\u03b1\u03b9 \u03c3\u03c4\u03b1 \u03c4\u03ad\u03bb\u03b7 \u03c4\u03b7\u03c2 \u03b4\u03b5\u03ba\u03b1\u03b5\u03c4\u03af\u03b1\u03c2 \u03c4\u03bf\u03c5 1980 \u03bf ISO \u03c3\u03c5\u03bd\u03b9\u03c3\u03c4\u03bf\u03cd\u03c3\u03b5 \u03c4\u03b7\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03c4\u03bf\u03c5 \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf\u03c5 OSI \u03c9\u03c2 \u03ba\u03bf\u03b9\u03bd\u03ce\u03c2 \u03b1\u03c0\u03bf\u03b4\u03b5\u03ba\u03c4\u03bf\u03cd \u03c5\u03c0\u03bf\u03b4\u03b5\u03af\u03b3\u03bc\u03b1\u03c4\u03bf\u03c2 \u03c3\u03c7\u03b5\u03b4\u03b9\u03b1\u03c3\u03bc\u03bf\u03cd \u03b4\u03b9\u03ba\u03c4\u03cd\u03c9\u03bd.<\/p>\n\n\n\n<p>\u03a0\u03b7\u03b3\u03ae \u03c6\u03c9\u03c4\u03bf\u03b3\u03c1\u03b1\u03c6\u03b9\u03ce\u03bd: Cloudflare<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u03a4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2 OSI (\u0391\u03bd\u03bf\u03b9\u03ba\u03c4\u03ae\u03c2 \u0394\u03b9\u03b1\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7\u03c2 \u03a3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd) \u03b5\u03af\u03bd\u03b1\u03b9 \u03bc\u03b9\u03b1 \u03b4\u03b9\u03b1\u03c3\u03c4\u03c1\u03c9\u03bc\u03b1\u03c4\u03c9\u03bc\u03ad\u03bd\u03b7, \u03b1\u03c6\u03b7\u03c1\u03b7\u03bc\u03ad\u03bd\u03b7 \u03c0\u03b5\u03c1\u03b9\u03b3\u03c1\u03b1\u03c6\u03ae \u03b3\u03b9\u03b1 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&quot;Tips&quot;","block_context":{"text":"Tips","link":"https:\/\/www.techhacks.gr\/?cat=4"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.techhacks.gr\/wp-content\/uploads\/2024\/05\/fibre-copper.webp?fit=1200%2C800&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.techhacks.gr\/wp-content\/uploads\/2024\/05\/fibre-copper.webp?fit=1200%2C800&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.techhacks.gr\/wp-content\/uploads\/2024\/05\/fibre-copper.webp?fit=1200%2C800&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.techhacks.gr\/wp-content\/uploads\/2024\/05\/fibre-copper.webp?fit=1200%2C800&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.techhacks.gr\/wp-content\/uploads\/2024\/05\/fibre-copper.webp?fit=1200%2C800&ssl=1&resize=1050%2C600 3x"},"classes":[]},{"id":3604,"url":"https:\/\/www.techhacks.gr\/?p=3604","url_meta":{"origin":2562,"position":1},"title":"\u03a3\u03b5\u03bc\u03b9\u03bd\u03ac\u03c1\u03b9\u03b1 \u03b1\u03c0\u03cc \u03c4\u03bf CERN","author":"maximus","date":"17\/06\/2025","format":false,"excerpt":"\u03a4\u03bf\u00a0CERN\u00a0(\u03c0\u03c1\u03bf\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9 \"\u03a3\u0395\u03a1\u039d\") \u03b5\u03af\u03bd\u03b1\u03b9 \u03bf\u00a0\u0395\u03c5\u03c1\u03c9\u03c0\u03b1\u03ca\u03ba\u03cc\u03c2 \u039f\u03c1\u03b3\u03b1\u03bd\u03b9\u03c3\u03bc\u03cc\u03c2 \u03a0\u03c5\u03c1\u03b7\u03bd\u03b9\u03ba\u03ae\u03c2 \u0388\u03c1\u03b5\u03c5\u03bd\u03b1\u03c2\u00a0(\u03c3\u03c4\u03b1 \u03b3\u03b1\u03bb\u03bb\u03b9\u03ba\u03ac:\u00a0Conseil Europ\u00e9en pour la Recherche Nucl\u00e9aire), \u03ba\u03b1\u03b9 \u03b1\u03c0\u03bf\u03c4\u03b5\u03bb\u03b5\u03af \u03ad\u03bd\u03b1 \u03b1\u03c0\u03cc \u03c4\u03b1 \u03c3\u03b7\u03bc\u03b1\u03bd\u03c4\u03b9\u03ba\u03cc\u03c4\u03b5\u03c1\u03b1\u00a0\u03b5\u03c1\u03b5\u03c5\u03bd\u03b7\u03c4\u03b9\u03ba\u03ac \u03ba\u03ad\u03bd\u03c4\u03c1\u03b1 \u03c3\u03c4\u03bf\u03bd \u03ba\u03cc\u03c3\u03bc\u03bf \u03b3\u03b9\u03b1 \u03c4\u03b7 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae \u03c4\u03c9\u03bd \u03c3\u03c9\u03bc\u03b1\u03c4\u03b9\u03b4\u03af\u03c9\u03bd. \ud83d\udd2c \u03a4\u03b9 \u03ba\u03ac\u03bd\u03b5\u03b9 \u03c4\u03bf CERN; \u03a4\u03bf CERN \u03bc\u03b5\u03bb\u03b5\u03c4\u03ac\u00a0\u03c4\u03b1 \u03b2\u03b1\u03c3\u03b9\u03ba\u03ac \u03c3\u03c5\u03c3\u03c4\u03b1\u03c4\u03b9\u03ba\u03ac \u03c4\u03b7\u03c2 \u03cd\u03bb\u03b7\u03c2\u00a0\u03ba\u03b1\u03b9 \u03c4\u03b9\u03c2\u00a0\u03b4\u03c5\u03bd\u03ac\u03bc\u03b5\u03b9\u03c2\u00a0\u03c0\u03bf\u03c5 \u03ba\u03c5\u03b2\u03b5\u03c1\u03bd\u03bf\u03cd\u03bd \u03c4\u03bf \u03c3\u03cd\u03bc\u03c0\u03b1\u03bd, \u03c0\u03c1\u03bf\u03c3\u03c0\u03b1\u03b8\u03ce\u03bd\u03c4\u03b1\u03c2 \u03bd\u03b1 \u03b1\u03c0\u03b1\u03bd\u03c4\u03ae\u03c3\u03b5\u03b9 \u03c3\u03b5 \u03b8\u03b5\u03bc\u03b5\u03bb\u03b9\u03ce\u03b4\u03b7 \u03b5\u03c1\u03c9\u03c4\u03ae\u03bc\u03b1\u03c4\u03b1 \u03cc\u03c0\u03c9\u03c2:\u2026","rel":"","context":"\u03c3\u03b5 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\u03c3\u03c5\u03bb\u03bb\u03ad\u03b3\u03bf\u03c5\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 &amp; \u03c0\u03ce\u03c2 \u03bd\u03b1 \u03b1\u03c0\u03b5\u03bd\u03b5\u03c1\u03b3\u03bf\u03c0\u03bf\u03b9\u03ae\u03c3\u03b5\u03b9\u03c2 \u03c4\u03b7\u03bd \u03c0\u03b1\u03c1\u03b1\u03ba\u03bf\u03bb\u03bf\u03cd\u03b8\u03b7\u03c3\u03b7.","author":"maximus","date":"20\/11\/2025","format":false,"excerpt":"\u039f\u03b9 \u03c3\u03cd\u03b3\u03c7\u03c1\u03bf\u03bd\u03b5\u03c2 Smart TVs \u03ad\u03c7\u03bf\u03c5\u03bd \u03b5\u03be\u03b5\u03bb\u03b9\u03c7\u03b8\u03b5\u03af \u03c3\u03b5 \u03c0\u03bb\u03ae\u03c1\u03b5\u03b9\u03c2 \u03c5\u03c0\u03bf\u03bb\u03bf\u03b3\u03b9\u03c3\u03c4\u03ad\u03c2: \u03c3\u03c5\u03bd\u03b4\u03ad\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03b4\u03b9\u03b1\u03b4\u03af\u03ba\u03c4\u03c5\u03bf, \u03c4\u03c1\u03ad\u03c7\u03bf\u03c5\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ad\u03c2, \u03ba\u03ac\u03bd\u03bf\u03c5\u03bd streaming \u03ba\u03b1\u03b9 \u03c0\u03c1\u03bf\u03c3\u03c6\u03ad\u03c1\u03bf\u03c5\u03bd \u03c0\u03c1\u03bf\u03c3\u03c9\u03c0\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b5\u03c2 \u03c0\u03c1\u03bf\u03c4\u03ac\u03c3\u03b5\u03b9\u03c2. \u03a9\u03c3\u03c4\u03cc\u03c3\u03bf, \u03b1\u03c5\u03c4\u03ae \u03b7 \u03b5\u03c5\u03ba\u03bf\u03bb\u03af\u03b1 \u03ad\u03c1\u03c7\u03b5\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03ad\u03bd\u03b1 \u03ba\u03cc\u03c3\u03c4\u03bf\u03c2: \u03c4\u03b7 \u03c3\u03c5\u03bb\u03bb\u03bf\u03b3\u03ae \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd \u03c7\u03c1\u03ae\u03c3\u03b7\u03c2. \u039f\u03b9 \u03c4\u03b7\u03bb\u03b5\u03bf\u03c1\u03ac\u03c3\u03b5\u03b9\u03c2 LG, \u03cc\u03c0\u03c9\u03c2 \u03bf\u03b9 \u03c0\u03b5\u03c1\u03b9\u03c3\u03c3\u03cc\u03c4\u03b5\u03c1\u03b5\u03c2 Smart TVs \u03c4\u03b7\u03c2 \u03b1\u03b3\u03bf\u03c1\u03ac\u03c2, \u03c3\u03c5\u03b3\u03ba\u03b5\u03bd\u03c4\u03c1\u03ce\u03bd\u03bf\u03c5\u03bd \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b5\u03c2 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