1 Pertemuan 01 Teknologi Jaringan Matakuliah: H0242 / Keamanan Jaringan Tahun: 2006 Versi: 1

2 Learning Outcomes Pada akhir pertemuan ini, diharapkan mahasiswa akan mampu : Mahasiswa dapat menjelaskan komponen dan protokol jaringan TCP/IP

3 Outline Materi OSI dan TCP/IP Model IP, UDP dan TCP Komponen Jaringan

4 Data Networks Data networking solutions –Local-area networks –Wide-area networks

5 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.

6 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.

7 WAN Technologies 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)

8 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.

9 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

10 Layers with Functions

11 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.

12 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.

13 The TCP/IP Reference Model

14 TCP/IP Protocol

15 Applications FTP – File Transfer Protocol HTTP– Hypertext Transfer Protocol SMTP – Simple Mail Transfer Protocol DNS – Domain Name System TFTP– Trivial File Transfer Protocol

16 OSI Model and TCP/IP Model

17 Data at Each Layer