Internetworking
Networks can be used by using a common connection to all the
node but it will slower the networks. So by using devices the networks are
splited in to segments. Each segments contain locally attached nodes.
* Increase the number of nodes that can connect to a network
than would be normally possible.
Limitations on the number of nodes that connected to the
networks depend on the cable lengths and traffic constraints.
*Extends the physical distance of a network.
* Localizes the traffic with network segments. Computers,
which are geographically close to each other, require to intercommunicate each
other. That local communication should not have any effects in the network
segments.
* Merges exsisting networks. This makes the way for the
inter commuincation of connected networks.
* Isolates network faults. faluts in one network will not
affet the other connected networks.
Internetworking Devices.
Repeaters. Repeaters respond
to the Physical layer of the OSI model and routes data from one net work
segments to another (Layer 1 of OSI
model) and extend the physical length of a connection that would normally be
possible with the cable type. They basically boost the electrical or light
signals.
Networks connections affected by the reduction of signal
strength and digital pulse distortion. As per given cable specification and bit
rate, each connection will have a maximum cable length that can be used to
transmit the data reliably. Repeaters can be used to increase the maximum
interconnection length and may do the following:
-
Reshape signal pulse.
- Pass
all signals between attached segments
- Boost
signal power
-
Possibly translate between two different media types
-
Transmit to more than one network. These are multiport repeaters and send data
frams from any received segment to all the others. Multiport repeaters do not
filter the traffic, as they blidly send received data frames to all the
physically connected network segments.
Hubs
switches
Further
link
Achievement - COMPUTER INTERNETWORKING FUNDAMENTALS (2001-03)
Internetworking Technology Overview
Back