{"id":29,"date":"2020-03-30T19:50:19","date_gmt":"2020-03-30T16:50:19","guid":{"rendered":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/?p=29"},"modified":"2020-03-30T19:50:19","modified_gmt":"2020-03-30T16:50:19","slug":"%cf%84%ce%bf-%ce%bc%ce%bf%ce%bd%cf%84%ce%ad%ce%bb%ce%bf-%ce%b1%ce%bd%ce%b1%cf%86%ce%bf%cf%81%ce%ac%cf%82-%ce%b3%ce%b9%ce%b1-%cf%84%ce%b7-%ce%b4%ce%b9%ce%b1%cf%83%cf%8d%ce%bd%ce%b4%ce%b5%cf%83%ce%b7","status":"publish","type":"post","link":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/2020\/03\/30\/%cf%84%ce%bf-%ce%bc%ce%bf%ce%bd%cf%84%ce%ad%ce%bb%ce%bf-%ce%b1%ce%bd%ce%b1%cf%86%ce%bf%cf%81%ce%ac%cf%82-%ce%b3%ce%b9%ce%b1-%cf%84%ce%b7-%ce%b4%ce%b9%ce%b1%cf%83%cf%8d%ce%bd%ce%b4%ce%b5%cf%83%ce%b7\/","title":{"rendered":"\u03a4\u03bf \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u0394\u03b9\u03b1\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7 \u0391\u03bd\u03bf\u03b9\u03ba\u03c4\u03ce\u03bd \u03a3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd (OSI)"},"content":{"rendered":"<p>\u03a4\u03b1 \u03b5\u03c0\u03c4\u03ac (7) \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf\u03c5 \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u0394\u03b9\u03b1\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7 \u0391\u03bd\u03bf\u03b9\u03ba\u03c4\u03ce\u03bd \u03a3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd:<\/p>\n<p>1. \u03a4\u03bf \u03a6\u03c5\u03c3\u03b9\u03ba\u03cc \u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03ae \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 (Physical layer) \u03b1\u03c3\u03c7\u03bf\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7 \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7 \u03c4\u03c9\u03bd bit (1|0) \u03c0\u03bf\u03c5 \u03b1\u03c0\u03b1\u03c1\u03c4\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03bf\u03bc\u03b1\u03b4\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b7 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b1 (\u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03bf \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd), \u03bc\u03ad\u03c3\u03c9 \u03c4\u03bf\u03c5 \u03c6\u03c5\u03c3\u03b9\u03ba\u03bf\u03cd \u03bc\u03ad\u03c3\u03bf\u03c5 \u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03bb\u03ce\u03b4\u03b9\u03bf, \u03bf\u03c0\u03c4\u03b9\u03ba\u03ae \u03af\u03bd\u03b1 \u03ae \u03b1\u03c3\u03cd\u03c1\u03bc\u03b1\u03c4\u03b7 \u03b6\u03b5\u03cd\u03be\u03b7.<\/p>\n<p>2.\u03a4\u03bf \u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0396\u03b5\u03cd\u03be\u03b7\u03c2 \u03ae \u03a3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7\u03c2 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd (Data Link layer) \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03c4\u03b7 \u03c6\u03c5\u03c3\u03b9\u03ba\u03ae \u03b4\u03b9\u03b5\u03c5\u03b8\u03c5\u03bd\u03c3\u03b9\u03bf\u03b4\u03cc\u03c4\u03b7\u03c3\u03b7 (MAC Addresses) \u03ba\u03b1\u03b9 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c5\u03c0\u03b5\u03cd\u03b8\u03c5\u03bd\u03bf \u03b3\u03b9\u03b1 \u03c4\u03bf\u03bd \u03ad\u03bb\u03b5\u03b3\u03c7\u03bf \u03c4\u03bf\u03c5 \u03bc\u03ad\u03c3\u03bf\u03c5 \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03c0\u03cc\u03c4\u03b5 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03b5\u03ba\u03c0\u03b5\u03bc\u03c6\u03b8\u03bf\u03cd\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03b1 \u03c3\u03b5 \u03b1\u03c5\u03c4\u03cc. \u0397 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03b1\u03c5\u03c4\u03ae \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03c4\u03bf \u03c5\u03c0\u03bf\u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0395\u03bb\u03ad\u03b3x\u03bf\u03c5 \u03a0\u03c1\u03cc\u03c3\u03b2\u03b1\u03c3\u03b7\u03c2 \u03c3\u03c4\u03bf \u039c\u03ad\u03c3\u03bf (Media Access Control).\u03a4\u03bf \u03c5\u03c0\u03bf\u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u039b\u03bf\u03b3\u03b9\u03ba\u03bf\u03cd \u0395\u03bb\u03ad\u03b3\u03c7\u03bf\u03c5 \u03c4\u03b7\u03c2 \u0396\u03b5\u03cd\u03be\u03b7\u03c2 (Logical Link Control) \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b1\u03be\u03b9\u03cc\u03c0\u03b9\u03c3\u03c4\u03b7 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03b4\u03c5\u03bf \u03ac\u03bc\u03b5\u03c3\u03b1 \u03c3\u03c5\u03bd\u03b4\u03b5\u03b4\u03b5\u03bc\u03ad\u03bd\u03c9\u03bd \u03b3\u03b5\u03b9\u03c4\u03bf\u03bd\u03b9\u03ba\u03ce\u03bd \u03ba\u03cc\u03bc\u03b2\u03c9\u03bd (\u03b2\u03c1\u03af\u03c3\u03ba\u03bf\u03bd\u03c4\u03b1\u03b9 \u03c3\u03c4\u03bf \u03af\u03b4\u03b9\u03bf \u03c6\u03c5\u03c3\u03b9\u03ba\u03cc\/\u03c4\u03bf\u03c0\u03b9\u03ba\u03cc \u03b4\u03af\u03ba\u03c4\u03c5\u03bf).<\/p>\n<p>&nbsp;<\/p>\n<p>3. \u03a4\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0394\u03b9\u03ba\u03c4\u03cd\u03bf\u03c5 (Network layer) \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03c4\u03b7 \u03bb\u03bf\u03b3\u03b9\u03ba\u03ae \u03b4\u03b9\u03b5\u03c5\u03b8\u03c5\u03bd\u03c3\u03b9\u03bf\u03b4\u03cc\u03c4\u03b7\u03c3\u03b7 \u03bc\u03b5 \u03b5\u03bd\u03b9\u03b1\u03af\u03bf \u03ba\u03b1\u03b9 \u03bc\u03bf\u03bd\u03b1\u03b4\u03b9\u03ba\u03cc \u03c4\u03c1\u03cc\u03c0\u03bf \u03b3\u03b9\u03b1 \u03cc\u03bb\u03b7 \u03c4\u03b7\u03bd \u03ad\u03ba\u03c4\u03b1\u03c3\u03b7 \u03c4\u03c9\u03bd \u03b4\u03b9\u03b1\u03c3\u03c5\u03bd\u03b4\u03b5\u03bc\u03ad\u03bd\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03bf\u03c5\u03c2 \u03b4\u03b9\u03ba\u03c4\u03cd\u03c9\u03bd. \u03a6\u03c1\u03bf\u03bd\u03c4\u03af\u03b6\u03b5\u03b9 \u03ce\u03c3\u03c4\u03b5 \u03c0\u03b1\u03ba\u03ad\u03c4\u03b1 \u03b4\u03b9\u03b1\u03c6\u03cc\u03c1\u03c9\u03bd \u03bc\u03b5\u03b3\u03b5\u03b8\u03ce\u03bd \u03bd\u03b1 \u03bc\u03c0\u03bf\u03c1\u03bf\u03cd\u03bd \u03bd\u03b1 \u03c0\u03b1\u03c1\u03b1\u03b4\u03bf\u03b8\u03bf\u03cd\u03bd \u03b1\u03c0\u03cc \u03c4\u03bf\u03bd \u03b1\u03c0\u03bf\u03c3\u03c4\u03bf\u03bb\u03ad\u03b1 \u03c3\u03c4\u03bf\u03bd \u03c4\u03b5\u03bb\u03b9\u03ba\u03cc \u03ba\u03cc\u03bc\u03b2\u03bf \u03c4\u03bf\u03c5 \u03c0\u03b1\u03c1\u03b1\u03bb\u03ae\u03c0\u03c4\u03b7 \u03b4\u03b9\u03b1\u03c3\u03c7\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03cc\u03bb\u03bf\u03c5\u03c2 \u03c4\u03bf\u03c5\u03c2 \u03b5\u03bd\u03b4\u03b9\u03ac\u03bc\u03b5\u03c3\u03bf\u03c5\u03c2 \u03ba\u03cc\u03bc\u03b2\u03bf\u03c5\u03c2 \u03ba\u03b1\u03b9 \u03b4\u03af\u03ba\u03c4\u03c5\u03b1, \u03c0\u03bf\u03c5 \u03b5\u03bd\u03b4\u03b5\u03c7\u03bf\u03bc\u03ad\u03bd\u03c9\u03c2 \u03bc\u03b5\u03c3\u03bf\u03bb\u03b1\u03b2\u03bf\u03cd\u03bd \u03bc\u03ad\u03c7\u03c1\u03b9 \u03c4\u03bf\u03bd \u03c4\u03b5\u03bb\u03b9\u03ba\u03cc \u03c0\u03c1\u03bf\u03bf\u03c1\u03b9\u03c3\u03bc\u03cc.<\/p>\n<p>&nbsp;<\/p>\n<p>4. \u03a4\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u039c\u03b5\u03c4\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2 (Transport layer) \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03cc\u03bb\u03b5\u03c2 \u03c4\u03b9\u03c2 \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b5\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b1 \u03bc\u03ad\u03c3\u03b1 \u03c0\u03bf\u03c5 \u03b1\u03c0\u03b1\u03b9\u03c4\u03bf\u03cd\u03bd\u03c4\u03b1\u03b9 \u03ce\u03c3\u03c4\u03b5 \u03bd\u03b1 \u03b5\u03c0\u03b9\u03c4\u03b5\u03c5\u03c7\u03b8\u03b5\u03af \u03bc\u03b9\u03b1 \u03b1\u03c0\u03cc \u03ac\u03ba\u03c1\u03bf \u03c3\u03b5 \u03ac\u03ba\u03c1\u03bf \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1 \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c0\u03c1\u03bf\u03b3\u03c1\u03b1\u03bc\u03bc\u03ac\u03c4\u03c9\u03bd \u03ae \u03b4\u03b9\u03b5\u03c1\u03b3\u03b1\u03c3\u03b9\u03ce\u03bd, \u03b5\u03be\u03b1\u03c3\u03c6\u03b1\u03bb\u03af\u03b6\u03bf\u03bd\u03c4\u03b1\u03c2 \u03c4\u03bf \u03b5\u03c0\u03b9\u03b8\u03c5\u03bc\u03b7\u03c4\u03cc \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03c0\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03af\u03b1\u03c2 (quality of service, QoS). \u0397 \u03c0\u03bf\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03b7\u03c2 \u03c5\u03c0\u03b7\u03c1\u03b5\u03c3\u03af\u03b1\u03c2 \u03c0\u03b5\u03c1\u03b9\u03bb\u03b1\u03bc\u03b2\u03ac\u03bd\u03b5\u03b9 \u03c4\u03b9\u03c2 \u03b1\u03c0\u03b1\u03b9\u03c4\u03ae\u03c3\u03b5\u03b9\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03ba\u03b1\u03b8\u03c5\u03c3\u03c4\u03ad\u03c1\u03b7\u03c3\u03b7 \u03b1\u03c0\u03bf\u03ba\u03b1\u03c4\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7\u03c2 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03af\u03b1\u03c2, \u03c4\u03b7\u03bd \u03c0\u03b9\u03b8\u03b1\u03bd\u03cc\u03c4\u03b7\u03c4\u03b1 \u03b1\u03c0\u03ce\u03bb\u03b5\u03b9\u03b1\u03c2 \u03c4\u03b7\u03c2 \u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7\u03c2, \u03c4\u03bf\u03bd \u03b5\u03c0\u03b9\u03c4\u03c5\u03b3\u03c7\u03b1\u03bd\u03cc\u03bc\u03b5\u03bd\u03bf \u03c1\u03c5\u03b8\u03bc\u03cc \u03b4\u03b9\u03b1\u03ba\u03af\u03bd\u03b7\u03c3\u03b7 (throughput), \u03c4\u03bf \u03b2\u03b1\u03b8\u03bc\u03cc \u03c0\u03c1\u03bf\u03c4\u03b5\u03c1\u03b1\u03b9\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03ba\u03b1\u03b9 \u03c4\u03b7\u03bd \u03b1\u03c3\u03c6\u03ac\u03bb\u03b5\u03b9\u03b1.<\/p>\n<p>&nbsp;<\/p>\n<p>5. \u03a4\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03a3\u03c5\u03bd\u03cc\u03b4\u03bf\u03c5 (Session layer) \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03c4\u03b1 \u03b1\u03bd\u03b1\u03b3\u03ba\u03b1\u03af\u03b1 \u03bc\u03ad\u03c3\u03b1 \u03b3\u03b9\u03b1 \u03c4\u03b7\u03bd \u03bf\u03c1\u03b3\u03ac\u03bd\u03c9\u03c3\u03b7 \u03ba\u03b1\u03b9 \u03c4\u03bf \u03c3\u03c5\u03b3\u03c7\u03c1\u03bf\u03bd\u03b9\u03c3\u03bc\u03cc \u03c4\u03c9\u03bd \u03b4\u03b9\u03b1\u03bb\u03cc\u03b3\u03c9\u03bd \u03bc\u03b5\u03c4\u03b1\u03be\u03cd \u03c4\u03c9\u03bd \u03b1\u03bd\u03c9\u03c4\u03ad\u03c1\u03c9\u03bd \u03b5\u03c0\u03b9\u03c0\u03ad\u03b4\u03c9\u03bd.<\/p>\n<p>&nbsp;<\/p>\n<p>6. \u03a4\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03a0\u03b1\u03c1\u03bf\u03c5\u03c3\u03af\u03b1\u03c3\u03b7\u03c2 (Presentation layer) \u03b1\u03c3\u03c7\u03bf\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7\u03bd \u03b1\u03bd\u03b1\u03c0\u03b1\u03c1\u03ac\u03c3\u03c4\u03b1\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b1\u03c2 \u03c0\u03bf\u03c5 \u03bc\u03b5\u03c4\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b1\u03b9 \u03b1\u03c0\u03cc \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03c3\u03b5 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03ba\u03b1\u03b8\u03ce\u03c2 \u03b5\u03c0\u03af\u03c3\u03b7\u03c2 \u03ba\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7 \u03b4\u03bf\u03bc\u03ae \u03c4\u03c9\u03bd \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd.<\/p>\n<p>7.\u03a4\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae\u03c2 (Application layer) \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03bf \u03b1\u03bd\u03ce\u03c4\u03b5\u03c1\u03bf \u03ba\u03b1\u03b9 \u03c4\u03b5\u03bb\u03b5\u03c5\u03c4\u03b1\u03af\u03bf \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03c0\u03c1\u03bf\u03c2 \u03c4\u03bf\u03bd \u03c7\u03c1\u03ae\u03c3\u03c4\u03b7 \u03ba\u03b1\u03b9 \u03c0\u03b1\u03c1\u03ad\u03c7\u03b5\u03b9 \u03c4\u03bf\u03bd \u03c4\u03c1\u03cc\u03c0\u03bf \u03b3\u03b9\u03b1 \u03bd\u03b1 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bc\u03b9\u03b1 \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae \u03bd\u03b1 \u201c\u03c3\u03c5\u03bd\u03bf\u03bc\u03b9\u03bb\u03b5\u03af\u201d \u03bc\u03b5 \u03bc\u03b9\u03b1 \u03ac\u03bb\u03bb\u03b7. \u0395\u03b9\u03b4\u03b9\u03ba\u03cc\u03c4\u03b5\u03c1\u03b1 \u03b5\u03c0\u03b9\u03c4\u03c1\u03ad\u03c0\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b5\u03be\u03b1\u03ba\u03c1\u03af\u03b2\u03c9\u03c3\u03b7 \u03c4\u03b7\u03c2 \u03c4\u03b1\u03c5\u03c4\u03cc\u03c4\u03b7\u03c4\u03b1\u03c2 \u03c4\u03c9\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd \u03c0\u03bf\u03c5 \u03b8\u03ad\u03bb\u03bf\u03c5\u03bd \u03bd\u03b1 \u03b5\u03c0\u03b9\u03ba\u03bf\u03b9\u03bd\u03c9\u03bd\u03ae\u03c3\u03bf\u03c5\u03bd, \u03b5\u03c0\u03b9\u03b2\u03b5\u03b2\u03b1\u03b9\u03ce\u03bd\u03b5\u03b9 \u03c4\u03b7\u03bd \u03b4\u03b9\u03b1\u03b8\u03b5\u03c3\u03b9\u03bc\u03cc\u03c4\u03b7\u03c4\u03b1 \u03c4\u03c9\u03bd \u03b5\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ce\u03bd \u03ba\u03b1\u03b9 \u03c4\u03bf\u03c5 \u03b4\u03b9\u03ba\u03b1\u03b9\u03ce\u03bc\u03b1\u03c4\u03bf\u03c2 \u03b3\u03b9\u03b1 \u201c\u03c3\u03c5\u03bd\u03bf\u03bc\u03b9\u03bb\u03af\u03b1\u201d.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u03a4\u03b9 \u03c0\u03c1\u03ad\u03c0\u03b5\u03b9 \u03bd\u03b1 \u03b8\u03c5\u03bc\u03ac\u03c3\u03c4\u03b5:<\/strong><\/p>\n<p><b>1.\u03a0\u03cc\u03c3\u03b1 \u03ba\u03b1\u03b9 \u03c0\u03bf\u03b9\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03c4\u03b1 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf\u03c5 OSI;<\/b><br \/>\n<strong>2.\u039d\u03b1 \u03bc\u03c0\u03bf\u03c1\u03b5\u03af\u03c4\u03b5 \u03bd\u03b1 \u03b1\u03bd\u03b1\u03c6\u03ad\u03c1\u03b5\u03c4\u03b5 \u03c4\u03b7\u03bd \u03bb\u03b5\u03b9\u03c4\u03bf\u03c5\u03c1\u03b3\u03af\u03b1 \u03c4\u03bf\u03c5 \u03c0\u03c1\u03ce\u03c4\u03bf\u03c5 \u03a6\u03c5\u03c3\u03b9\u03ba\u03bf\u03cd \u03ba\u03b1\u03b9 \u03c4\u03b5\u03bb\u03b5\u03c5\u03c4\u03b1\u03af\u03bf\u03c5 \u0395\u03c6\u03b1\u03c1\u03bc\u03bf\u03b3\u03ae\u03c2 \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03bf<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u03a4\u03b1 \u03b5\u03c0\u03c4\u03ac (7) \u03b5\u03c0\u03af\u03c0\u03b5\u03b4\u03b1 \u03c4\u03bf\u03c5 \u03bc\u03bf\u03bd\u03c4\u03ad\u03bb\u03bf\u03c5 \u03b1\u03bd\u03b1\u03c6\u03bf\u03c1\u03ac\u03c2 \u03b3\u03b9\u03b1 \u03c4\u03b7 \u0394\u03b9\u03b1\u03c3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7 \u0391\u03bd\u03bf\u03b9\u03ba\u03c4\u03ce\u03bd \u03a3\u03c5\u03c3\u03c4\u03b7\u03bc\u03ac\u03c4\u03c9\u03bd: 1. \u03a4\u03bf \u03a6\u03c5\u03c3\u03b9\u03ba\u03cc \u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u03ae \u03c3\u03c4\u03c1\u03ce\u03bc\u03b1 (Physical layer) \u03b1\u03c3\u03c7\u03bf\u03bb\u03b5\u03af\u03c4\u03b1\u03b9 \u03bc\u03b5 \u03c4\u03b7 \u03bc\u03b5\u03c4\u03ac\u03b4\u03bf\u03c3\u03b7 \u03c4\u03c9\u03bd bit (1|0) \u03c0\u03bf\u03c5 \u03b1\u03c0\u03b1\u03c1\u03c4\u03af\u03b6\u03bf\u03c5\u03bd \u03c4\u03b7\u03bd \u03bf\u03bc\u03b1\u03b4\u03bf\u03c0\u03bf\u03b9\u03b7\u03bc\u03ad\u03bd\u03b7 \u03c0\u03bb\u03b7\u03c1\u03bf\u03c6\u03bf\u03c1\u03af\u03b1 (\u03c0\u03bb\u03b1\u03af\u03c3\u03b9\u03bf \u03b4\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd), \u03bc\u03ad\u03c3\u03c9 \u03c4\u03bf\u03c5 \u03c6\u03c5\u03c3\u03b9\u03ba\u03bf\u03cd \u03bc\u03ad\u03c3\u03bf\u03c5 \u03c4\u03bf \u03bf\u03c0\u03bf\u03af\u03bf \u03bc\u03c0\u03bf\u03c1\u03b5\u03af \u03bd\u03b1 \u03b5\u03af\u03bd\u03b1\u03b9 \u03ba\u03b1\u03bb\u03ce\u03b4\u03b9\u03bf, \u03bf\u03c0\u03c4\u03b9\u03ba\u03ae \u03af\u03bd\u03b1 \u03ae \u03b1\u03c3\u03cd\u03c1\u03bc\u03b1\u03c4\u03b7 \u03b6\u03b5\u03cd\u03be\u03b7. 2.\u03a4\u03bf \u0395\u03c0\u03af\u03c0\u03b5\u03b4\u03bf \u0396\u03b5\u03cd\u03be\u03b7\u03c2 \u03ae \u03a3\u03cd\u03bd\u03b4\u03b5\u03c3\u03b7\u03c2 \u0394\u03b5\u03b4\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd [&hellip;]<\/p>\n","protected":false},"author":11172,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-29","post","type-post","status-publish","format-standard","hentry","category-1"],"_links":{"self":[{"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/posts\/29","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/users\/11172"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/comments?post=29"}],"version-history":[{"count":0,"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/posts\/29\/revisions"}],"wp:attachment":[{"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/media?parent=29"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/categories?post=29"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.e-me.edu.gr\/hive-diktya\/wp-json\/wp\/v2\/tags?post=29"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}