Matakuliah
Tahun
Versi
: H0242 / Keamanan Jaringan
: 2006
:1
Pertemuan 01
Teknologi Jaringan
1
Learning Outcomes
Pada akhir pertemuan ini, diharapkan
mahasiswa akan mampu :
• Mahasiswa dapat menjelaskan komponen
dan protokol jaringan TCP/IP
2
Outline Materi
• OSI dan TCP/IP Model
• IP, UDP dan TCP
• Komponen Jaringan
3
Data Networks
• Data networking solutions
– Local-area networks
– Wide-area networks
4
Networking Devices
Equipment that connects directly to a network
segment is referred to as a device.
These devices are broken up into two classifications.
The first classification is end-user devices.
The second classification is network devices.
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Network Protocols
• Protocol suites are collections of protocols
that enable network communication from one
host through the network to another host.
• A protocol is a formal description of a set of
rules and conventions that govern a
particular aspect of how devices on a
network communicate.
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WAN Technologies
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Analog modems
Integrated Services Digital Network (ISDN)
Digital Subscriber Line (DSL)
Frame Relay
Asynchronous Transfer Mode (ATM)
E carrier series: E1, E3
Synchronous Digital Hierarchy (SDH)
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Intranets and Extranets
• Intranets are designed to permit access by users who
have access privileges to the internal LAN of the
organization.
• Extranets refer to applications and services that are
Intranet based, but that use extended, secure access to
external users or enterprises.
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OSI Reference Model
• The application (upper) layers
– Layer 7: Application
– Layer 6: Presentation
– Layer 5: Session
• The data-flow (lower) layers
– Layer 4: Transport
– Layer 3: Network
– Layer 2: Data link
– Layer 1: Physical
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Layers with Functions
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The Purpose of OSI Model
• It breaks network communication into smaller,
simpler parts that are easier to develop.
• It facilitates standardization of network components
to allow multiple-vendor development and support.
• It allows different types of network hardware and
software to communicate with each other.
• It prevents changes in one layer from affecting the
other layers so that they can develop more quickly.
• It breaks network communication into smaller parts
to make learning it easier to understand.
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Peer-to-Peer Communication
• For data to travel from the source to the
destination, each layer of the OSI model at the
source must communicate with its peer layer at
the destination.
• During this process, the protocols of each layer
exchange information, called protocol data units
(PDUs), between peer layers.
• Each layer of communication on the source
computer communicates with a layer-specific
PDU, and with its peer layer on the destination
computer.
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The TCP/IP Reference Model
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TCP/IP Protocol
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Applications
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FTP
HTTP
SMTP
DNS
TFTP
– File Transfer Protocol
– Hypertext Transfer Protocol
– Simple Mail Transfer Protocol
– Domain Name System
– Trivial File Transfer Protocol
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OSI Model and TCP/IP Model
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Data at Each Layer
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