pc 네트워크
DESCRIPTION
PC 네트워크. 네트워크 장비. NIC (Network Interface Card). PC 를 LAN 에 연결시켜주는 Interface Card 통신하고자 하는 컴퓨터 사이를 케이블로 연결한 다음 프로토콜 소프트웨어를 이용해 한 컴퓨터에서 다른 컴퓨터로 데이터를 주고 받을 수 있다 . PCI, 10/100Base-T, Ethernet 방식 3COM, Intel, Realtk 사 등의 제품들이 있음. 라우터 ( ROUTER ). - PowerPoint PPT PresentationTRANSCRIPT
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PC
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NIC (Network Interface Card)PC LAN Interface Card .PCI, 10/100Base-T, Ethernet 3COM, Intel, Realtk
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( ROUTER ) LAN . OSI (LLC) (MAC) LAN . . .
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. . . . .
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(Repeater) . , . . . . .
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(SWITCH) . .LAN PC . , .OSI 2 , . 3 , IP .
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(Bridge) OSI MAC . Broadcasting .LAN WAN LAN . . .
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(HUB) . 1 . . () , .
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. . .
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! 10Mbps 5 2Mbps 10Mbps .
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Ethernet(IEEE802.3),10base-X 10Base5 : Thick Cable, , 500m10Base2 : Thin Cable, , 185m10BaseT : UTP, 100m, Cat.3, 4, 510BaseF : Fiber Optic Cable, 2Km
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Fast Ethernet,100base-X 100Base-T4 : UTP, 4Pair , Cat.3, 4, 5100Base-Tx : UTP, 2pair , Cat.5100Base-Fx :
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1. 2. 3. 4. 5.
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(PROTOCOL) . (Syntax) : , , (Semantic) : , (Timing) :
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OSI(Open Systems Interconnection) 7 Layer ?1984 ISO (International Standard Organization) OSI . . .
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(Physical layer)OSI . . , , . . .
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(Data link layer) , . . , . .
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(Network layer) . . , , . , . .
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(Transport layer) . , . . , , . () TCP, UDP .
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(Session layer) . , . (checkpoint) . .
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(Presentation layer) . , . , , , .
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(Application layer)OSI . , e-mail . ( http, ftp, telnet, smtp)
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IP(Internet Protocol) , , .
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OSI 7 Network Layer . TCP . . IP . 65,535. . , .
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TCP(Transport Control Protocol) (TCP) . TCP , . TCP . , , .
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TCP . (Virtual Circuit) .OSI 7 (Transport Layer) . FTP, HTTP, Telnet.
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TCP/IP
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TCP/IP Hardware Interface(Ethernet, PPP )IPICMPARPRARPTCPUDPUser Application(HTTP, FTP, Telnet )
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TCP/IP Network Layer( )OSI 48bit MAC(Media Access Control) Address IP ARP/RARP
Internet Layer( )IP(Internet Protocol)TCP, UDP, ICMP ICMP(Internet Control Message Protocol) ARP(Address Resolution Protocol)IP Hardware RARP(Reverse ARP)Hardware IP
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Transport Layer( )TCP(Transmission Control Protocol) full-duplex, byte stream TCP .UDP(User Data Protocol) UDP datagram
Application Layer( ) HTTP, Telnet, FTP, SMTP, POP3
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IPX (Internetwork packet exchange) (NetWare) 386 . (XNS) , OSI 3 (CL) . (IP) , .
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SPX (sequenced packet exchange) (Novell, Inc.) (NetWare) . (XEROX) XNS(XEROX Network System) , OSI 4 (connection oriented) .
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IPX / SPX ( Internetwork Packet Exchange / Sequenced Packet Exchange ) 1980 Novell . Novell Netware Protocol. IPX/SPX IPX SPX , IPX TCP/IP IP , SPX TCP .
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NetBIOS MS IBM PC-LAN (API). API (LAN) , NetBEUI(NetBIOS extended user interface) . (PC) NetBIOS .
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NetBIOS . 1. NAMING: . 2. Session: . 3. Datagram: Datagram .4. 5. () .
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TCP/IP (Transmission Control Protocol/Internet Protocol) , . TCP/IP , TCP/IP , . TCP , .
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IP , . , . TCP , .
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HTTP , Telnet, FTP SMTP . , , , 4
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. .2 . , . , , . , , .
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IP : : 32bit 8bit 4 , (.) 10 NIC(Network Information Center) , IP 4bytes(32bits) (.) 10 . 203.172.112.72 10 . IP Class A, B, C, D, Class E. Class A, B, C IP 4Bit .
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(Subnet Mask) IP ID ID . IP . .(SubNetting)(Supernetting)
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IP 4 , 4 ID/ ID . IP , ID ID .Class A 255.0.0.0 (Host 224 -2 )Class B 255.255.0.0 (Host 216 -2 )Class C 255.255.255.0 (Host 28 -2 )
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IP VER 4 TCP/IP TCP, UDP, ICMP, IGMP IP . Internet . host 4 (32bit) dot(.) NIC (Network Information Center) /. Best effort (Connection-less) Hop by Hop . . (MTU Size) network IP : network routing / network 32bit IP
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IP version 6 IP (Expanded Addressing) (Scalable Routing) IP V4 IP V6 Address size = 128bit(16 bytes)Header format . extension header: networking audio and video: flow labels and QoS
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IPv6 address dotted hexadecinal notation or colon hex 104.230.140.100.0.0.0.0.0.0.0.5.150.10.255.255 68E6:8C64:0:0:0:5:96A:FFFF zero compression ( address ) 68E6:8C64::5:96A:FFFF IPv4 dotted 10 IPv6 68E6:8C64:0:0:0:5:150.10.255.255 zero compression 68E6:8C64::5:150.10.255.255
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TOPOLOGY . , . , (Star), (Mesh), (Bus), (Ring), (Tree) .
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BUS Topology : . . .
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Ring Topology : . Ring , , .
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(Tree Topology) (Head-and) (Branch) , ,
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Star Topology: . .
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(Mesh Topology) . Bus-Star ( ) star .
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BUS . . XXXX .XXXX
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IPCONFIG Ipconfig.exe DHCP( ) IP . IP /showclassID adapter DHCP ID ./setclassIDadapter [classidtoset]. classid classid . /all, /renew
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PING ping IP ping IP ICMP . TCP/IP ping . ping . ping IP_address ping . Ping TCP/IP . PING IP
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ping 127.0.0.1 IP IP . ping IP_address_of_local_host IP . ping IP_address_of_default_gateway IP .
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TRACERT . (ICMP) . c:\>tracert www.empas.com
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NSLOOKUP . , . IP . .Windows NT/2000
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1. E-mail() . . POP3 ( )SMTP ( )
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2. FTP() File Transfer Protocol ., , , , , , .
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3. Gopher() .
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4. Usenet() PC .
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5. Telnet . .
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6. (WWW : World Wide Web) , , , ., , , . (HTTP) .
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HTTP (Hyper Text Transfer Protocol) , , , , . . HTTP(Hyper Text Transfer Protocol; ) (Daemon) . HTTP HTTP .
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Fire-Wall()
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PROXY SERVER ( ) . . (Firewall) , www FTP . , . .
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File server (LAN) . LAN , .
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DNS (Domain Name Server) SERVER IP . IP IP . IP 147.46.80.205 4 sis.snu.ac.kr
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URL ( Uniform Resource Locator )? HTTP, FTP, , e-mail, , . URL .
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, ( ), . (syntax) :// / / .URL . URL , , , , . Protocol://host.domain/directory/file URL http , ftp, news .
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PC . e- , . PC . . , ID(e-mail address) . ID PC , .
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POP, SMTP
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SMTP(Simple Mail Transfer Protocol Server) .SMTP= =POP3-Post office Protocol 3 POP3 .POP3= =
SMTP POP3
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IMAP(Internet Mail Access Protocol) , .IMAP , , , .
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NNTP(Network News Transport Protocol)
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SNMP simple network management protocol TCP/IP (RFC 1157). (Router), (Hub) (network agent) .
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TCP/IP (SGMP:simple gateway management protocol) , (OSI) (CMIP) . 2 , . 1988 RFC 1157 (SNMP) , 1991 SNMP2 SNMP2 .
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Watermarking . , .
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. .
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PGP (pretty good privacy) . , . 3 .
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S-HTTP secure hypertext transfer protocol (HTTP) . SSL(secure sockets layer) .S-HTTP HTTP SSL HTTP (FTP) (Telnet) (TCP) .
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1. 2. 3.