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Pengantar Jaringan Komputer

Pengantar Jaringan Komputer. Iwan Syarif Hero Yudo Martono. Kumpulan dua atau lebih dari komputer yang saling berhubungan satu sama lain. Apa itu Jaringan. Kegunaan Jaringan. Sharing resource (data, printer, dll) Efisiensi waktu Efisiensi tempat Effisiensi dana. Kerugian Jaringan.

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Pengantar Jaringan Komputer

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  1. Pengantar Jaringan Komputer Iwan Syarif Hero Yudo Martono Lecture 1

  2. Kumpulan dua atau lebih dari komputer yang saling berhubungan satu sama lain Apa itu Jaringan Lecture 1

  3. Kegunaan Jaringan • Sharing resource (data, printer, dll) • Efisiensi waktu • Efisiensi tempat • Effisiensi dana Lecture 1

  4. Kerugian Jaringan • Membutuhkan biaya tambahan • Memungkinkan adanya serangan ke komputer kita • Mengurangi human communication Lecture 1

  5. Types of Computer Networks • Local Area Networks (LANs) • within a building or campus • usually based on broadcast channels • often connected via gateways to wide area networks • Examples: (Fast)Ethernet, FDDI rings, Myrinet, ATM LANs • Bit rates: 10-1000 Mbps Computer Cable Computer (a) (b) Lecture 1

  6. Type of Computer Networks • Metropolitan Area Networks (MANs) • covers area of a city • usually based on LAN technology • Examples: DQDB (Distributed Queue Dual Bus), cable television networks Lecture 1

  7. Type of Computer Networks • Wide Area (Long Haul) Networks • may cover country, continent • Most communication links are point-to-point • usually irregular topology • usually organized as a “subnet” to which hosts have access. • switching elements are generically referred to as routers Lecture 1

  8. Wireless Networks • Wireless: Cordless telephones, TV remote control, Analog cellular telephones • Wireless LANs • Mobile vs. wireless • mobile, not wireless • mobile, wireless • not mobile, not wireless • not mobile, wireless Lecture 1

  9. Internetworking • Many (mutually incompatible) network technologies • No one technology appropriate for every situation • Internetworking glues together networks of dissimilar technologies with routers • Result is virtual network whose details are invisible Lecture 1

  10. Internetworking (example) Different network technologies can be connected to create an internetwork Lecture 1

  11. Peralatan Jaringan Sederhana • PC (komputer) • LAN card • Kabel UTP • RJ 45 • Tang Crimping • Multimeter • Hub • Switch Lecture 1

  12. LAN card Lecture 1

  13. Pasang LAN card ke PC Lecture 1

  14. a human protocol and a computer network protocol: TCP connection reply. Get http://gaia.cs.umass.edu/index.htm Got the time? 2:00 <file> time What’s a protocol? Hi TCP connection req. Hi Q: Other human protocol? Lecture 1

  15. Transmission media • Transmitted energy is carried through some sort of medium • Transmitter encodes data as energy and transmits energy through medium • Requires special hardware for data encoding • Requires hardware connection to transmission medium • Media can be copper, glass, air, ... Lecture 1

  16. Copper wires • Twisted pair uses two wires • Coaxial cable includes shield for improved performance Lecture 1

  17. Kabel UTP Lecture 1

  18. Glass fibers • Thin glass fiber carries light with encoded data • Plastic jacket allows fiber to bend (some!) without breaking • Fiber is very clear and designed to reflect • 　　light internally for efficient transmission • Light emitting diode (LED) or laser • 　　injects light into fiber • Light sensitive receiver at other end translates • 　　light back into data Lecture 1

  19. Radio • Data transmitted using radio waves • Energy travels through the air rather than copper or glass • Conceptually similar to radio, TV, cellular phones • Can travel through walls and through an entire building • Can be long distance or short distance • Long distance with satellite relay • Short distance - wireless computer network Lecture 1

  20. Base-station antenna for a wireless radio-frequency network; this antenna is attached to a unit that also connects to a wire-based network and forwards data between the wireless and wire-based networks Wireless Example • Wireless bridge and antenna Lecture 1

  21. Wireless Example • Remote station (laptop) interface Lecture 1

  22. Microwave • High frequency radio waves • Unidirectional, for point-to-point communication • Antennas mounted on towers relay transmitted data Lecture 1

  23. Infrared • Infrared light transmits data through the air • Similar to technology used in TV remote control • Can propagate throughout a room (bouncing off surfaces), but will not penetrate walls • Becoming common in personal digital assistants Lecture 1

  24. Laser • Unidirectional, like microwave • Higher speed than microwave • Uses laser transmitter and photo-sensitive receiver at each end • Point-to-point, typically between buildings • Can be adversely affected by weather Lecture 1

  25. RS-232 wiring and connectors Lecture 1

  26. Modems • If external to computer, RS-232 can be used between modem and computer Lecture 1

  27. Modems • If external to computer, RS-232 can be used between modem and computer Lecture 1

  28. Modems in a computer center for dial-up modem access to the organization network Modems • If internal, direct bus connection used • Can also be rack-mounted Lecture 1

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