CCNA 3 Chapter 5 Switching Concepts By Your Name Objectives Introduction to LANs Introduction to LAN switching Switch operation LAN Development Factors that Impact Network Performance Network traffic (congestion). Multitasking desktop operating systems (Windows, UNIX, and Mac) allow work transactions. Faster desktop operating systems (Windows, UNIX, and Mac) can initiate work activity. Increased number of client/server applications using work data.
Performance of a shared-medium / LANs is negatively affected by factors such as the following: The broadcast delivery nature of . Carrier sense multiple access collision detect (CSMA/CD) access method allows only one host to transmit at a time. Multimedia applications with higher bandwidth demand such as video and the . The latency of additional devices added by the extension of LANs by using repeaters. The distance added by using Layer 1 repeaters. Half-Duplex Network Congestion Network Latency Latency, or delay, is the time a frame or a packet takes to travel from the source station to the final destination. 10BASE-T Transmission Times Bit time (or slot time) — The basic unit of time in which 1 bit can be sent. For electronic or optical devices to recognize a binary 1 or 0, there is a minimum duration during which the bit is "on" or "off. " Transmission time — Equals the number of bits being sent times the bit time for a given technology. Another way to think about transmission time is as the time it takes a frame to actually be transmitted. (Small frames take a shorter amount of time, large frames take a longer amount of time to be transmitted.) Benefits of Using Repeaters
