Functions of network devices
Separating (connecting) networks or expanding an existing network.
Examples: repeaters, hubs, bridges, routers, switches, gateways are used to provide communication between network devices.
Network devices used for Remote access
Example: Remote access devices are 56K Modems and ADSL modems
we should follow the following steps while Expanding Network
Networks cannot be made larger by simply adding new computers and more cables. it is Less efficient.
large LAN to be divided into various segments to form smaller LAN's
These LAN's should be connected using the following components.
LAN segments connected using Repeaters, bridges, routers, switches or gateways.
Why we need to use Repeaters and Hubs in Network Communication?
Repeaters or hubs works at the OSI physical layer to regenerate the network’s signal and resend them to other segments. Hubs will regenerates data and broadcasts them to all ports
Cannot link unlike segments
Cannot join segments with different access methods (e.g. CSMA/CD and token passing)
Do not isolate and filter packets
Can connect different types of media
The most economic way of expanding networks
Separating (connecting) networks or expanding an existing network.
Examples: repeaters, hubs, bridges, routers, switches, gateways are used to provide communication between network devices.
Network devices used for Remote access
Example: Remote access devices are 56K Modems and ADSL modems
we should follow the following steps while Expanding Network
Networks cannot be made larger by simply adding new computers and more cables. it is Less efficient.
large LAN to be divided into various segments to form smaller LAN's
These LAN's should be connected using the following components.
LAN segments connected using Repeaters, bridges, routers, switches or gateways.
Why we need to use Repeaters and Hubs in Network Communication?
Repeaters or hubs works at the OSI physical layer to regenerate the network’s signal and resend them to other segments. Hubs will regenerates data and broadcasts them to all ports
what are the Limitations and Features of Hubs?
Cannot link unlike segments
Cannot join segments with different access methods (e.g. CSMA/CD and token passing)
Do not isolate and filter packets
Can connect different types of media
The most economic way of expanding networks
Bridges:
Bridges Has one input and one output
Bridges Used to isolate network traffic and computers
Bridges Has the intelligent to examine incoming packet source and destination addresses
Bridges cannot interpret higher-level information
How Bridges Work?
Bridges work at the Media Access Control Sub-layer of the OSI model
Routing table implemented to record the segment address
If destination address is in the same segment as the source address, stop transmit. Otherwise, forward to the other segment.
