Technology Training that works
Troubleshooting Industrial Ethernet & TCP/IP Networks
Technology Training that Workswww.idc-online.com/slideshare
Topics LAN and WAN OSI Reference Model Troubleshooting Methodology
Technology Training that Workswww.idc-online.com/slideshare
Local Area Network
is a communications system is constrained within an organisation is privately owned covers about 2 to 3 km maximum will include:-
workstations, servers & peripherals a shared access medium
Technology Training that Workswww.idc-online.com/slideshare
Wide Area Network WAN
Elements are separated by distances that require telecommunications links Publicly or privately owned Shared lines - packet & circuit switched Leased lines - dedicated connection Distance can be global - 1000s+ km Slow to medium speed (now) cf LANs High error rates (1 in 1 Mbits)
Open Systems and Communications
Specifications open to all ISO defined OSI Model (1978) 7 Layers Not a Protocol but an overall framework
Protocols can be developed for layers independently
Technology Training that Workswww.idc-online.com/slideshare
OSI Model
Technology Training that Workswww.idc-online.com/slideshare
OSI Model - Functions of layers
Application Network services to user
application
Presentation Converts data between
application formats
Session Control communications
sessions Map name to addresses
Transport Manage communications
between end systems
Network Inter-network routing Fragmentation of packets
Data Link Assembly and disassembly
of message frames
Physical Electrical & mechanical
Technology Training that Workswww.idc-online.com/slideshare
OSI Message Passing
Application
Presentation
Session
Transport
Network
Data Link
Physical
Protocol ControlInformation (PCI)
User Message
DLT
DLT Post
Technology Training that Workswww.idc-online.com/slideshare
Technology Training that Workswww.idc-online.com/slideshare
Troubleshooting Methodology
Most problems occur in lowest layers Systematically check these first Many problems with cables and Physical layer
broken wires, connector issues and noise Data Link Layer
Ethernet interfaces, switches Network layer
IP configuration, routers and firewalls
Technology Training that Workswww.idc-online.com/slideshare
DO YOU WANT TO KNOW MORE?
If you are interested in further training or information, please visit:
http://idc-online.com/slideshare