Notes:

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• Data Link Layer Physical Addressing, error notification, orderly delivery of frame, flow control .

• Physical Layer voltage level, data rate, maximum transmission distance, physical connector .

• EIA/TIA-232 Physical Layer .

Notes:

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• Ethernet Xerox , 1980 DEC, Intel Specification 1 . 1984 Specification 2

• IEEE 802.3 CSMA/CD LAN Ethernet 2

• IEEE 802.3 802.2 LLC

• CSMA/CD (carrier sense multiple access with collision detection) .

• AUI (attatchment unit interface)

• Ethernet 10Base2 10Base5 HUB .

• * cisco specific

	Ethernet	Token-Ring	FDDI
	10Mbps	4Mbps/16Mbps	100Mbps
	Bus	Ring	Dual-Ring
	CSMA/CD
	, , UTP ,	STP, UTP ,
	500m	1Km	100Km/ring
	500m	100m	2Km
	1.5kBytes	4Kbytes/18Kbytes	4.5kbytes
	1024	260 (STP ) 72 (UTP )	500

Notes:

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• Token Ring IBM 1970

• Ethernet/IEEE802.3

• Token Ring IEEE802.5

• IEEE802.5 Token Ring IEEE802.5 Specification

• Token Ring IBM Token Ring IEEE802.5

• MAU (Multistation Access Unit) 8

• MAU Ring

• * cisco specific

Notes:

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• FDDI 1987 ANSI X3T9.5 standard

• 100Mbps dual Token Ring (CDDI)

• dual counter-rotating rings

Notes:

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• LLC (logical link control)
  • LAN media IP, IPX, Appletalk Packet . Layer Layer
  • flow control sequencing service

• MAC
  • addressing

• MAC Address
  • 12 hexadecimal digits
  • Vendor Code (OUI: organizationally unique identifier)
  • IEEE OUI
  • 3COM OUI : 02608C
  • SUN OUI : 080020
  • CISCO : 00000C

• ARP (Address Resolution Protocol) in TCP/IP
  • RARP (Reverse ARP)

Notes:

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• WAN Standard
  • international telecommunication union(ITU)-telecommunication standardization sector (ITU/T), formerly the Consultative Committee for international telegraph and telephone(CCITT)
  • International Organization for Standardization (ISO)
  • Internet Engineering Task Force (IETF)
  • Electronic Industries Association (EIA)

Notes:

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• SDLC
  • IBM .
  • multipoint connection
  • primary station, secondary station , primary station

• HDLC
  • ISO
  • Vendor
  • point-to-point multipoint connection

• LAPB
  • X.25
  • frame . Ack

• PPP
  • RFC1546 by IETF
  • point-to-point connection
  • . Packet

• Frame Relay
  • LAPB error checking

• SLIP
  • IP Packet , asynchronous transmission , error checking

Notes:

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• • 1 .
  • .
  • .

• • 32Kbps 16Kbps 3 1 .
  • . .

• • X.25
  • .
  • .
  • Frame Relay ATM (CIR) .

Notes:

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• LAN LAN Host Terminal , PSTN, ISDN, PSDN(X.25, IP, Frame Relay, ATM Network) .

• .

• + .

• DCE .

Notes:

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• NT : Network Terminator

• TA : Terminal Adaptor

• TE1 : Terminal Equipment with the Interface T

• TE2 : Terminal Equipment with no ISDN Interface

• Interface U ISDN NT , Interface T NT ISDN , Interface S NT TA . TA ISDN S-Card PC PC .

• ISDN NT NT . NT NT Interface U NT NT Interface U .

• NT Interface U , NT Interface S .

• Interface U BRI PRI BRI 2B+1D channels , PRI 23B + 1D 30B+D channels . 23B+1D T1 , 30B+1D E1 , PRI .

• B channel channel 64Kbps , BRI 128Kbps (64Kbps x 2) , PRI 1920Kbps (64Kbps x 30) . D channel channel BRI PRI D channel 16Kbps 64Kbps .

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