องค์ประกอบอินเทอร์เน็ตมีอะไรบ้าง

�Թ�� (Internet) ��͢��¤��§��ͧ��ҹ��ͧ��š��Ҵ��¡ѹ��͢�� (Global Network) �� 60 ��ҹ�� ͻ�Сͺ�Ԩ��ҡ��µ�� þٴ�� â�� š��¹��ä�� ä�Ң��Ẻ��硷�͹ԡ�� ֡�ҷҧ�� ͤ��駷��Թ��絶�͡��Դ��鹹�� ¤Ҵ�Դ��ѹ�С��͢��·��պ��ҷ�Ѻ�Զժ��Ե�ͧ��㹻Ѩ�غѹ ��֧��Ҵ��ѧ�л��ѵ��Ըա�ô��Թ��Ե�ͧ��Ъҡ��š�ȵ��˹�� Ǥ�� 20 �ա�͹ ��з�ǧ��Ѱ��Դ�ǹ��Ѳ��͢��¤��ժ�� ARPANET �ش��¤��͢��·��դ��Ͷ��٧ ��ö��зӧҹ��ѧ��ԡҶ١��ظ�� ѧ��෤��շ��͢�� ͧ�դ��ö��зӧҹ�Ѻ�ç��ҧ��鹰ҹ (Infrastructure) ��ͨҡ��÷��¢ͧ��ظ�� ҡ�ç��Ѿ�� Ŷ١��㹺ҧ��鹷�� ͢��¨��ѧ��ӧҹ��¡��Ѻ��ç�� ç��´�� Է�� 繵� �͡�ҡ��෤��մѧ��ǵ�ͧ�դ��ö㹡��ͧ��ҧ�� е�ҧ��蹷��仵��ҹ�Ѿ��ҧ �
㹤��駹�鹡�þѲ��͢�� ARPANET ��з��ѹ��ҧ��з�ǧ�� Ѻ��Է��µ�ҧ � ��˹��§ҹ�Ӥѭ � ��ͧ�� NASA �� ARPANET ��Ժ��ա��ҹ�ҡ��Ѻ��֡��С��Ԩ�� ֧��ա�þѲ��͢�� DECNET �� BITNET ��繤�� Т�ʹբͧ ARPANET ��к��Դ��ⵤ��Ẻ TCP/IP ��ӡѴ�Ѻ��ͧ��㴻��˹�� ç�� (Physical Links) Ẻ�Ẻ˹�� ѹ��Ҫ�Ф��С��繵��͢�� ҡѹ�� ö��¡ѹ��ͧ ��˵ع�� ARPANET �١�Ѳ��͢��¢ͧ��͢�� Թ�� (internet) 㹷��ش ��ʹբͧ��÷��к��Դ �� ö��෤��ա��Ẻ�� Ǿ �� Ѿ�� ǹ��ʧ ��к��Ѿ��͹�� ö��ͤ��Ẻ㴡�� ѧ��ç��¤�� ͡��੾��ǹ�ͧ�� Թ��絢��µ�ǧ��㹢�з��Ѻ��͹�ͧ�ҹ��ùѡ ��㹡�â��͢��С��ҹ ��Թ��Ѻ��͡��Ѱ��ԡ� ��͢��·��§��š

1. �к��Թ�� (Internet) ��к��͢��¤�� ͢�� ա��§��Ҵ��¡ѹ �·��ء��ͧ��ö��Ͷ֧�ѹ��š

2. �к��Թ�� (Intranet) ��к��͢��¤��㹡��ͧͧ��ù�� ෤��բͧ�Թ�� (Inernet) �繾�鹰ҹ

3. �к��硫�� (Extranet) �繡��§��ҧͧ��õ�ҧ � ��Թ��Ҵ��¡ѹ ��硫��絹�� ͧ��÷��ѹ��ö�觢��ʹ��ҧ��͢��Թ��絢ͧ��Ѻͧ�� ͼ��ԡ��ҧ��ʹ��

	��Թ�� �Թ�� (�ѧ��: Internet) ��¶֧ ��͢��¤��좹Ҵ�˭� ��ա��ҧ��͢�� ͢��·��š ��ҷ��áѹ��ҧ��¡�� ⷤ�� (Protocol) ͧ��Сͺ㹡��Թ�� 5 ��ǹ �� 1. �к�� �� Ѩ��¾�鹰ҹ㹡�÷ӧҹ�ͧ�� 1.1 �� ػ�ó��÷ӧҹ��ٻẺ��͢�� 1.2 �Ϳ�� 繪ش��ӧҹ��鹾�鹰ҹ��ҧ� 1.3 �� 繼��ӧҹ��ͧ�� 1.4 �� 觷��ͧ��͹��ҹ��Թ�� 2. �ػ�ó��͢�� ��͵�ǡ�ҧ㹡��Ѻ��觢�� ҡ�ػ�ó��鹰ҹ�� 3. �� �繫Ϳ��ҡ�Ϳ��繵�͡�÷ӧҹ��鹾�鹰ҹ�ͧ�� 4. �ҵðҹ㹡�äǺ�� 觷��Ǻ��С�˹��͹�㹡��Ѻ��觢��Ţͧ�Թ�� 5. ��ԡ��Թ�� ��˹��§ҹ��ԡ��Թ��ؤ�ŷ��ٻẺ��Ҫԡ��ҧ�� 㹻�� ҧ�� �Ըա��Թ�� �Ըա��Թ��絡��§�µç��ࡵ��繡��§��͢�� �� ҡѺ Backbone �ͧ�Թ�� ¼�ҹࡵ�� (Gateway) �� IP Router ��ä��٧�ҡ �ѡ��Ѻͧ��â�Ҵ�˭� ��ͧ�ҡ�դ��٧�ҡ ��§�� ��ҹInternet Service Providers(ISP)�繡��§�� Թ��¼�ҹ��ѷ��ԡ�èѴ��á��§

�ٻẺ��Թ�� ��Թ��Ẻ�� (Wire Internet) 1. ��Թ��ºؤ�� (Individual Connection) ��Թ�� ºؤ�� Թ��絨ҡ��ҹ (Home user) ��ѧ��ͧ��¤�� Ѿ�� 㹡��͢��Թ�� ͧ��Ѥ��Ҫԡ�Ѻ �� ��ԡ��Թ�� ͹ �ҡ�� Ѿ��ͧ��ԡ��Թ�� ʼ�� (User name) ��ʼ�ҹ (Password)��к��Թ��͡Ѻ��ͧ ��ع��ѧ��Ţ ��Ѿ��ͧ�� ԡ��Թ�� ҡ��鹨֧��ö�� ҹ�Թ�� ͧ��Сͺ�ͧ��Թ��ºؤ�� 1. ��Ѿ�� 2. ��ͧ�� 3. ��ԡ��Թ�� 觨��Ѿ�� ʼ��ʼ�ҹ 4. �� (Modem)

2. ��Թ��Ẻͧ�� (Corporate Connection) ��Թ��Ẻͧ��ù��о��仵��˹��§ҹ��ҧ� ��Ҥ�Ѱ��͡�� ˹��§ҹ��ҧ� ��ҹ��͢��·�ͧ�� (Local Area Network : LAN) �繢ͧ��ͧ ��͢�� LAN ��Թ��絵�ʹ�� ҹ�� (Leased line) �ѧ�� ؤ�ҡ��˹��§ҹ �֧ ��ö ��Թ��ʹ�� Թ��絼�ҹ�к� LAN ��ա��ҧ�� (Connection) ��͹��ºؤ�ŷ��ѧ��ͧ��¤��Ѿ��㹡��͢��Թ��