21-12-2012, 04:52 PM
IP Network Fundamentals
IP Network Fundamentals.pdf (Size: 1.28 MB / Downloads: 24)
OSI reference modelOpen system interface
It deals with the connecting open systems that is systems open for communication with the other systems
Open Systems are systems that use standardized communication procedures developed from the reference model
Thus, all such open systems are able to communicate with each other
The word “system” can refer to computers, exchanges, data networks, etc.
TCP/IP Protocol Suite
The TCP/IP protocol suite is made of five layers: physical, data link, network, transport, and applicationThe first four layers provide physical standards, network interface, internetworking, and transport functions that correspond to the first four layers of the OSI model.The three topmost layers in the OSI model, however, are represented in TCP/IP by a single layer called the application layer
Networking Devices-Switches
•Layer 2 device
•Learns MAC addresses of devices attached to each port
•Each switchportis a collision domain
•More collision domains BUT smaller collision domains
•Broadcasts still sent out of every port
•Each switchporthas dedicated bandwidth
•100% bandwidth available