LECTURE 10 NET301 11/12/2015Lect 10 NET301 1. NETWORK STANDARDS Standards determine: Techniques used in the networks. Its protocols. Network specifications.

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Presentation transcript:

LECTURE 10 NET301 11/12/2015Lect 10 NET301 1

NETWORK STANDARDS Standards determine: Techniques used in the networks. Its protocols. Network specifications and features 11/12/2015Lect 10 NET3012

LAN STANDARDS Ethernet LAN standards: 1982 by Xerox, Digital, Intel Use CSMA/CD protocol Transmission rate: 1-10 Mbps Standards include: Coaxial cable. Bus topology. Number of projects and standards have been conducted by many associations of IEEE called project IEEE-802 for LAN standards. 11/12/2015Lect 10 NET3013

LAN STANDARDS: IEEE LAN 802

LAN IEEE-802 LAN IEEE-802.1: Concerned with: Network Layer: inter networking among 802 LANs, MANs and WANs. LAN IEEE-802.2: Concerned with: Logical Link Control LLC sub-layer DLL in IEEE standards : MAC+LLC 11/12/2015Lect 10 NET3015

LAN IEEE /12/2015Lect 10 NET3016

LAN IEEE 802 Based on Ethernet standards IEEE 802.3: concerned with: CSMA/CD protocol. ~ similar to Ethernet Differ to Ethernet: not only Coaxial Cables used + not only Bus topology used: Ring …etc Transmission rate: more than 10Mbps, 100 Mbps Fast Ethernet and 1000 Mbps Giga Ethernet. It has numbers of sub-standards related to Ethernet, Fast Ethernet LANs: type of transmission media, network length, transmission media, type of signal … etc 11/12/2015Lect 10 NET3017

LAN IEEE /12/2015Lect 10 NET3018

LAN IEEE standards name contain 3 parts: 1 st part: Transmission rate: 10 Mbps, 100 Mbps … etc 2 nd part: transmission type and signal: Base: base band: digital signal Broad: Broadband: analog 3 rd part: maximum network length or type of transmission media. 5 (10 Base 5): 500m T (10 Base T): Twisted pair F (100 Base FX): Fiber Optics. 11/12/2015Lect 10 NET3019

LAN IEEE /12/2015Lect 10 NET30110

LAN IEEE 802 Giga Ethernet: Transmission rate: 1 Gbps: 1000Mbps name: 802.3Z Has several types based on the transmission media used: 11/12/2015Lect 10 NET30111

ETHERNET LAN TECHNOLOGIES Technologies used in the previous standards includes: Data Frames. MAC protocol type. type of transmission media. coding techniques. network topology. 11/12/2015Lect 10 NET30112

DATA FRAME FOR ETHERNET AND NETWORKS All networks and Ethernet networks use MAC protocol of type CSMA/CD and similar type of data frame standards use frame length: 1518 byte ( preamble and CRC is not included) Minimum frame length: 64 byte ( length enough to detect collisions if occurred) 11/12/2015Lect 10 NET30113

802.3 DATA FRAME 11/12/2015Lect 10 NET30114

802.3 DATA FRAME Pre-amble حقل التزامن : 7 byte. Used for synchronization. Start Frame Delimiter (SFD) حقل البدء : 1 byte. Destination address عنوان المرسل إليه : 6 byte ~ can be minimized to 2 byte. Physical address. Source address عنوان المرسل : 6 byte ~ can be minimized to 2 byte. Physical address. Frame length field حقل طول الاطار : 2 byte ~ networks Type of protocol of the upper layer ~ Ethernet. 11/12/2015Lect 10 NET30115

802.3 DATA FRAME LLC data حقل بيانات الطبقة الاعلى : 1500 byte – 64 byte length, includes: Error Detection field ( Cyclic Redundancy Check CRC ): حقل اكتشاف الاخطاء 4 byte. 11/12/2015Lect 10 NET30116