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Jaringan Komputer Lanjut. Ethernet dan IEEE 802.3 LAN Standard. -Aurelio Rahmadian-. Pemodelan Lapisan Jaringan. Physical Layer. Physical Layer.
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Jaringan Komputer Lanjut Ethernet dan IEEE 802.3 LAN Standard -Aurelio Rahmadian-
Physical Layer • Media is the actual physical environment through which data travels as it moves from one component to another, and it connects network devices. The most common types of net-work media are twisted-pair cable, coaxial cable, fiber-optic cable, and wireless. Each media type has specific capabilities and serves specific purposes. • Understanding the types of connections that can be used within a network provides a better understanding of how networks function in transmitting data from one point to another.
Logical Link Control (LLC) • Makes the connection with the upper layers. • Frames the Network layer packet. • Identifies the Network layer protocol. • Remains relatively independent of the physical equipment. • Uses IEEE 802.2 standard.
Media Access Control (MAC) • Data Encapsulation: Includes frame assembly before transmission, frame parsing upon reception of a frame, data link layer MAC addressing, and error detection. • Media Access Control: Because Ethernet is a shared media and all devices can transmit at any time, media access is controlled by a method called Carrier Sense Multiple Access with Collision Detection (CSMA/CD).
Alasan Penggunaan Ethernet • Simplicity and ease of maintenance • Ability to incorporate new technologies • Reliability • Low cost of installation and upgrade
Sejarah Ethernet • Coaxial • 10BASE5 (Thicknet) • 10BASE2 (Thinnet)
Sejarah Ethernet • UTP • 10BASE-T • Half-duplex communication
Sejarah Ethernet • UTP • 100BASE-TX • Full-duplex communication
Struktur Frame Ethernet • Header • Preamble • Start of Frame Delimiter • Address • Length • Data (Packet) • Trailer
Struktur Frame Ethernet • Preamble • 7 octet of 10101010 • Start of Frame Delimiter • 1 octet of 10101011 • Address • Source MAC Address • Destination MAC Address • Length/Ethertype • Data (Packet-Segment-Data) • Frame Check Sequence • Cyclic Redundancy Check (CRC) • Interframe Gap • 12 octet of idle-line state