concepten van computernetwerken. 2003-2004 - information management 2 groep t leuven – information...
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Concepten van computernetwerken
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OSI Model
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Protocol Overview
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Netwerk-protocollen
ApplicationApplication
PresentationPresentation
SessionSession
TransportTransport
NetworkNetwork
Data-linkData-link
PhysicalPhysical
ApplicationApplication
TransportTransport
InternetInternet
Network InterfaceNetwork Interface
OSI Model Internet Protocol Suite
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Netwerk-protocollen
Network Interface
Internet
Transport
Application
ICMPICMP
TCPTCP UDPUDP
IPIP
HTTP, HTTPS, SMTP, POP, LDAP
FTP, TELNETBGP, NTP, NNTP
HTTP, HTTPS, SMTP, POP, LDAP
FTP, TELNETBGP, NTP, NNTP
DNSDHCP, RADIUS, SNMP
RIPRealAudio, CU-SeeMe
NetMeeting
DNSDHCP, RADIUS, SNMP
RIPRealAudio, CU-SeeMe
NetMeeting
ARPARP
PPPEthernet, PSTN, ISDN, Frame Relay, ATM
PPPEthernet, PSTN, ISDN, Frame Relay, ATM
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Hosts en routers
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Protocollen en interfaces
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Encapsulatie
User data
User dataApp.
header
Application dataTCP
header
Application dataTCP
headerIP
header
Application dataTCP
headerIP
headerEthernet
headerEthernet
trailer
TCP segment
IP datagram
Ethernet Frame
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Demultiplexing
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TCP/IP en standaardisatie
• Internet Architecture Board• Internet Research Task Force• Internet Engineering Task Force• Internet Engineering Steering Group
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RFC’s : Request for comment• Werkdocumenten voor de Internet Community• Standaarden worden gepubliceerd in RFC’s• Vijf classificaties:
– Required, recommended, directional, informational, and obsolete
• Ontwikkeld op basis van consensus
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RFC’s : Example
2328 OSPF Version 2. J. Moy. April 1998. (Format: TXT=447367 bytes)
(Obsoletes RFC2178) (Also STDO054) (Status: STANDARD)
2178 J..Moy, .OSPF yersion 2., 07/22/1997. (Pages=211) (Format=.txt)
(Obsoletes RFC1583)
1583 J. Moy, nosPF Version 2., 03/23/1994. (Pages=212)
(Format=.txt, :ps) (Obsoletes RFC1247) (Obsoleted by RFC2178)
1247 J. Moy, .OSPF Version 2n, 08/08/1991. (Pages=189)
(Format=.txt, .ps) (Obsoletes RFCl131) (Obsoleted by RFC1583)
1131 J. Moy, nosPF specificationn, 10/01/1989. (Pages=107)
(Format=.txt, .ps) (Obsoleted by RFC1247)
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RFC’s : ExampleMailer software MUST be able to send and receive messages of at
least 64K bytes in length (including header), and a much larger
maximum size is highly desirable.
Host software MUST handle hostnames of up to 63 characters and
SHOULD handle hostnames of up to 255 characters.
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Oefening
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Oefening• Download + bekijk rfc-index.txt• Download + lees RFC 1812 of RFC 1123• Download RFC 1918