รายงาน 55555

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1. 1 26 4/1 2. 2 31102 4/1 3. 3 4 4 5 67 713 17 1819 20 2021 22 4. 4 5 5. 51. (Sender) 2. (Receiver) 3. (Massage) (Text) (Voice) (Image) (Multimedia) VDO conference 4. (Medium) 5. (Protocol) 3 1. (Simplex Transmission) e-mail 6. 6 2. (Half Duplex Transmission) 2 3. (Full Duplex Transmission) 2 (Transmission) (Electronic data) 7. 7 2 1.(Digitals signal) (Discrete) 0 1 2.(Analog Signal) 8. 8 (Transmission media) (Medium) (Transmission medium) 2 1. (Guide media) (Twisted pair) 1.1 Twisted Pair () UTP (Unshielded Twisted Pair) (Shielded Twisted Pair) - UTP (Unshielded Twisted Pair) (twisted pair) 2 2 1. (Unshielded Twisted Pair : UTP) 9. 92. (Shielded Twisted Pair : STP) (Plastic Cover) UTP (Unshielded Twisted Pair) - STP (Shield Twisted Pair) UTP (Shield) UTP (Shielded Twisted Pair) 1.2 (Coaxial Cable) 10. 10 "" 2 2 75 50 0.4 - 1.0 "" (Echo) 2 (thick) (thin) Ethernet (Hub) UTP 1.3 (Fiber-Optic) 11. 11 (Optic Fiber) (fiber optic) 1. 2. 3. 4. 2. (Unguided media) 2.1 12. 12 (Microwave) - 23,300 . (Transponder) 13. 13 - (Delay Time) - 14. 141. (Terminal) (Personal Computer) 2. (Modem) (Internet) 1. - - (rate) / (bps) / (kbps) 56,000 bps 56 K 2. (compression) - 3. (Fax capabilities) - (printer) 4. (error control) 5. 2 (external modems) (internal modems) 15. 156. - 1. 2. 3. 4. 5. , 6. - 7. 1. 2. OS 3. - 4. 5. 6. 7. - 8. 3. (Repeater) 4. (Amplifier) 16. 16 (Data Communictaion Equipment) (Hub, Repeater) - LAN Concentrator LAN LAN Star 10BaseT 2 Passive Hub - Active Hub (Switch, Bridge) (LAN) (Ethernet LAN) (Token Ring LAN) Ethernet Switch (Multiport Bridge) Ethernet Segment 17. 17 (Switching) (Router) (Ethernet LAN) (UTP: Unshield Twisted Pair) (filter) ( )(Coaxial cable) (Gateway) (Firewall) (Multiplexer) MUX (Multiplex) MUX (deMultiplex) (Concentrator) (store and forward) buffer (compress) 18. 18 (Repeater) (Switched Network) 4 1. (The Telephone NetworK) 2. (The Telex/TWX Network) 3. (package Switching Network) 4. (Specialized Digital Network) 1. 2. (Electronic Mail : E-mail) 19. 19 (Facsimile Fax) - (Voice Mail) (Video Conferencing) Video Conferencing (Global Positioning Systems : GPSs) (groupware) (Electronic Fund Transfer : EFT) ATM (Electronic Data Interchange : EDI) (RFID) RFID 20. 20 1. (Analog Signal) (Sine Wave) (Hertz) 1 60 Hz 1 60 2. (Digital Signal) (01) Bit Rate 1 14,400 bps 14,4001 1 (Modulator DEModulator Modem) (Modem) (bit per second bps) 56 1. 2. 3. 4. 2 21. 21- (Analog signal) - (Digital signal) 1. (Analog signal) (Sine Wave) (Hertz) 2 (Frequency) 1 (Ampitude) 1 2. (digital signal) (0 1) 1 (Wired system) (Shielded and UnShielded Twisted-Pair Cable) 22. 22 2 (Channel) (Coaxial Cable) (Transmission) 23. 23 http://www.thaigoodview.com/node/53181 http://www.bs.ac.th/2548/e_bs/G7/raim/in2page1.html http://www.chakkham.ac.th/technology/network/equ.html http://it.benchama.ac.th/ebook/files/pg7_8.htm http://www.nukul.ac.th/it/content/07/7-1.html http://www.chakkham.ac.th/commueqp.html