Analiza dhe optimizimi i performancës së rrjetave LAN duke përdorur Cisco Packet Tracer

Abstract

This paper deals with the analysis and optimization of network performance (LAN) and its implementation in Cisco Packet Tracer simulator. The main goal is to find the causes that affect network performance such as: latency, throughput, packet loss and diversity acceptance and the application of network designs to improve efficiency, stability and security. In the tedious theoretical work that is necessary, for the study of the practice of traffic management, the basic standards and protocols (e.g. Ethernet, VLAN, STP) and the exercise with privilege management tools, the basic security measures ACL, Port Security and DHCP Snooping were taken into account. Then, in Cisco Packet Tracer, a virtual environment was created where the LAN version was designed and the addition of VLAN, Traffic Shaping with QoS, Loop Prevention with STP and Ethernet Channel Aggregation (LACP) was implemented. There were implementations and several mechanisms for preventing authorization and for regulating IP conflict. The simulation shows that the application of VLANs and the good configuration of DHCP reduces IP address conflicts and broadcast traffic. The activation of STP for both Ethernet and EtherChannel increases redundancy and reduces latency costs in the environment between switches, while QoS provides stable levels of service for critical services such as VoIP telephony and video conferencing. Ping tests in the core network after optimizations resulted in 0% packet loss in total and latency below 1ms. This paper simplifies that simulations with Cisco Packet Tracer as attacks before planning the behavior of a network in real conditions, are still an idea for the speed of the optimal construction without using gages and the discovery of tested routes and stationary that is suitable for infrastructures that allow to stay fast and fast with security constructions.