Module này mô tả Ethernet nhà cung cấp Sense Multiple Access / Collision Phát hiện truy cập (CSMA / CD) phương pháp. Module này cũng mô tả khung Ethernet, bao gồm địa chỉ, các lĩnh vực khung, đóng gói, các đơn vị truyền tải tối đa (MTUs), và các lỗi. Module này cũng mô tả các tiện ích mạng lưới hỗ trợ | Module 3 Describing Ethernet Interfaces Objectives This module describes Ethernet s Carrier Sense Multiple Access Collision Detect CSMA CD access method. This module also describes the Ethernet frame including addresses frame fields encapsulation maximum transfer units MTUs and errors. This module also describes network utilities that assist in configuring and troubleshooting the system s network interfaces. Upon completion of this module you should be able to Describe Ethernet concepts Describe Ethernet frames Use network utilities The following course map shows how this module fits into the current instructional goal. Configuring the Network Interface Layer Introducing the TCP IP Model Introducing LANs and Their Components Describing Ethernet Interfaces Describing ARP and RARP Figure 3-1 Course Map 3-1 Copyright 2002 Sun Microsystems Inc. All Rights Reserved. Enterprise Services Revision A Introducing Ethernet Concepts Introducing Ethernet Concepts Ethernet was designed as a packet-switching LAN over broadcast technology. Devices connect to the network and compete for access to a shared communications channel. The IEEE standard for Ethernet was defined in 1985. Ethernet standards are implemented at the Network Interface layer of the TCP IP protocol model. Major Ethernet Elements The three major elements of Ethernet networks are Ethernet packets are called frames. These are units of data sent across the network. The Ethernet access method CSMA CD. This method controls packet transmission and information flow across the Ethernet hardware. Hardware cables connectors and circuitry. These transfer data to and from systems across the network. CSMA CD Access Method Non-switched Ethernet uses a broadcast delivery mechanism in which each frame that is transmitted is heard by every station. CSMA CD is an arbitrary access method that provides a method to detect and recover from simultaneous transmissions. Each interface monitors the network for a carrier signal .
