The subject purpose is to make students familiar with modern computer networks technologies. Students will understand Ethernet principles in detail and will be able to diagnose PPP-based WAN links problems. They will also be able to interconnect LANs using ISDN, Frame Relay and ATM, will understand VLANs and remote network management. MPLS, Voice-over-IP and access networks architectures will be also discussed. Practical network constructions and traffic measurement will be performed in the networking laboratory.