Abstract:
This project will present a model of a virtual laboratory of computer networks, carried
out with simulation tools such as GNS3 and its libraries. GNS3 will allow us to imple-
ment and simulate the topology close to real topology in the real laboratory, it also helps
in virtualization of new topologies easily and quickly and economically. We will design
and implement new virtual topologies to test more advanced concepts such as bridging,
dynamic and adapted routing, load balancing between routers and other device networks
or NAT con gurations (Network Address Translation). GNS3 allow us to test di erent
con gurations changing the addressing and routing information, analyzing Internet data
tra c anywhere in the topology or control the network security adapting the con gura-
tions of access lists in the routers. In this paper we will use Wireshark. Wireshark is
a packet analyzer integrated in GNS3 used to capture, sni and analyze data packets
according to both used protocols and encapsulated information on virtual Ethernet or
serial interfaces.
