A hands on training course introducing the concepts of data communications, moving on to covering both LAN and WAN technology. Quizzes are used extensively to ensure material has sunk in and to maximise learning time. Hands on sessions ensure that by the end of the course delegates have made cables, built LANS and WANS, configured TCP/IP, switches and routers.
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By the end of the course delegates will be able to: Use the seven layer model to classify networking buzzwords. Build and troubleshoot Ethernet, LAN/WAN and WiFi networks Explain the difference between switches and routers. Connect networks with routers.
What are Networks?
What is data communications? What are networks? Types of network, LANs, LAN choices, WANs, WAN choices, PANs, SANs, MANs, connecting networks. Internetworks, the internet, clouds.
Networks and standards
Standards bodies, ISO, ITU, IEEE, IETF, OSI 7 layer refer
The Physical Layer
Transmission media: Copper, Fibre, RF, UTP, Cat 5/5e/6/7..., RJ45, straight and cross over cables. Coax, Fibre cable & connectors, SFP, MMF, SMF, radio spectrum, frequencies, ranges, noise and electrical distortion, repeaters.
Hands on: Cabling, ping.
Bandwidth
Definition, Bits, bytes, speeds, simplex, half/full duplex, a/symmetrical, aggregation, latency. Calculating bandwidth requirements.
The Datalink layer
Frames, classifications, standards, LAN/WAN layer 2 technologies (Point to point, virtual circuits).
Ethernet
What is Ethernet? 802.3, evolution from CSMA/CD, choosing cables, topologies, NICs, MAC addresses. Ethernet frame format.
Hands on: Analysing Ethernet frames.
Ethernet switches
Connecting multiple devices, switches work at layer 2, Switches vs. hubs, simultaneous conversations, full duplex, MAC address database, how switches work, switch benefits, loops, STP. Console ports.
Hands on: Switches and WireShark, configuring switches, broadcast storms, STP.
Wireless LANs
Type of wireless network. WiFi, 802.11b/g/n/ac, antennae, interference, 802.11 frame format, CSMA/CA, half duplex, Wireless Access Points, security.
Hands on: Building a WiFi network.
WANS
WAN architecture, WAN types, service providers, access equipment, DTE, DCE, core equipment, WANs and the 7 layer model, choosing a WAN.
Packet switched network
Packet switching, virtual circuits, Hub & spoke, partial & full mesh, ATM, MPLS, MPLS and routers, Why MPLS? MPLS-TE, MPLS VPN, Internet VPN.
Service provider technologies
Transport plane, SDH, SONET, WDM, CWDM, DWDM, DWDM architectures, OTN.
TCP/IP
Definition, protocols, services, internetworking, the Internet, intranets, IAB, RFCs, IP header, IP addressing, subnet masks, IPv6, TCP, UDP.
Hands on: IP address and subnet mask configuration.
Routers
What are routers? Routers vs switches, when to route and when to switch, default gateways, routing tables, static routes, routing protocols. Firewalls, how firewalls work.
Hands on: Router configuration, tracert.
Applications
Clients, servers, web, HTTP, Email, resource sharing, IM, VoIP, Video over IP, terminal emulation, ftp, ssh.
Hands on: telnet
Join our public courses in our Greece facilities. Private class trainings will be organized at the location of your preference, according to your schedule.
Greece is experiencing a significant digital shift, with Athens and Thessaloniki becoming emerging centers for international tech investments and startup growth. Supported by world-class academic institutions such as the National Technical University of Athens, the country is focusing on modernizing its digital infrastructure and expanding its software development capabilities. Greece's strategic location makes it an important gateway for tech services between Europe and the Middle East, attracting global giants for data center and cloud projects. Our training programs in Greece focus on bridging the gap between academic theory and the practical demands of the modern tech market. By offering specialized courses in Web Development, Cloud Infrastructure, and AI, we empower Greek IT professionals to compete effectively on the global stage.