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Unformatted text preview: ms and in intermediate systems Found At end-systems primarily hides details of datalink layer At
segmentation and reassembly: max. size of packet carried by a segmentation network layer protocol may be bigger than that of a data link layer. error detection error Network layer (contd.)
At intermediate systems, e.g. routers or switches, At
participates in routing protocol to create routing or VCI tables participates responsible for forwarding packets responsible scheduling the transmission order of packets scheduling choosing which packets to drop choosing Two types of network layers
In datagram (or connectionless) networks, e.g. the current In Internet
provides both routing and data forwarding provides In connection-oriented network In
we distinguish between data plane and control plane we data plane only forwards and schedules data (touches every byte) data control plane responsible for routing, call-establishment, callcontrol teardown (doesn t touch data bytes) touch Network layer (cont d)
Postal network Postal
set up internal routing tables set forward letters from source to destination forward static routing static multiple qualities of service multiple Internet Internet
network layer is provided by Internet Protocol network found in all end-systems and intermediate systems found provides abstraction of end-to-end link provides segmentation and reassembly segmentation packet-forwarding, routing, scheduling packet-forwarding, unique IP addresses unique can be layered o...
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This note was uploaded on 12/08/2010 for the course IEG IEG3310 taught by Professor Wingc.lau during the Spring '10 term at CUHK.
- Spring '10