INTERNETWORKING DEVICES
NETWORKING DEVICES:-
Network devices are components used to connect computers or other electronic devices togeather that they can share file or resources like printers.
TYPES OF NETWORK DEVICES
- Repeaters
- Hubs
- Bridges
- Switches
- Routers
- Gateways
- Firewell
- Nic ( network interface card)
- L3 switch
- Brouter
1. REPEATERS-
- A repeaters oprates the physical layer. its job is to regenerate the signal over the same network before the signals becomes to weak or corrupted.
- when the signal becomes weak they copy the signal bit by bit and regenerate it at the original strength.
- it is a 2 port device.
2. HUBS:-
- A hub is basically a multiport repeater.
- hubs are devices commonly used to connect segments of LAN.
- when a packets arrives at one port, it is copied to the other ports so that all segments of the LAN can see all packets.
TYPES OF HUBS
there are two types of hub…………
- ACTIVE HUB
- PASSIVE HUB
- ACTIVE HUB:-
These are hubs which have their own power supply and can clean, boost and relay the signal along with the network. It serves both as a repeater as well as wiring centere. There are used to extend the maximum distance between nodes.
- PASSIVE HUB:-
3. BRIDGES:-
- A bridges oprates at data link layer.
- A bridges is a repeater, with add on the functionality of filtering content by reading the MAC address of source and destination.
- It is also used for interconnecting two LANs working on the same protocol.
- It has a single input and single output ports, thus making it a 2 port devices.
4. SWITCH:-
- A switch is a multiport bridge.
- A switch is a data link layer device.
- The switch can perform error checking before forwarding data, that makes it very efficient.
- It does not forward packets that have errors and forward good packets selectively to correct port only.
TYPES OF SWITCHES
there are two types of switches………
- managable switch
- unmanagable switch
- MANAGABLE SWITCH:- Those switches which we can manage according to our need of network is called managable switch.
UNMANAGABLE SWITCH:- Those switches which we can not manage according to our need of network is called unmanagable switch.
5.ROUTERS:-
- Router is mainly a network layer device.
- A router is a device that forwards data packets along networks.
- A router is connected to at least two networks, commonly two LANs or WANs or a LAN and its ISP’s network.
ISP= INTERNET SERVER PROVIDER
THERE ARE TWO TYPES OF ROUTERS………..
- wired
- wireless
6.GATEWAY:-
- A gateway is a hardware device that acts as a gate between two networks.
- It may be a router, firewall, server or other device that enables traffic to flow in and out of the network.
7.FIREWALL:-
- A firewall is a network security device, either hardware or software-based, which moniters all incoming and outgoing traffic and based on a defined set of security rules it acceptes, rejects or drops that specific traffic.
- ACCEPT:- Allow the traffic.
- REJECT:- Block the traffic but reply with an “unreachable error”.
- DROPS:- Block the traffic with no reply.
8.NIC (network interface card):-
It stands for NETWORK INTERFACE CARD. It allow you to connect with a network. It works on frist layer of OSI model.
There are two types os NIC card…………
- wired
- wireless
9.MODEMS(modulation and demodulation):-
It is stands for modulation and demodulation, it is use to convert analog signal into digital signal and voice varsa.
VOICE VARSA= OPPOSITE
10.L3 SWITCH:-
It stands for layer 3 switch. It has functionolity of both router and switch.
11.BROUTER:-
- It is also known as bridging router is a device which combines features of both bridge and router.
- It can work either at data link layer or at network layer.
- Working as router, it is capable of routinng packets across networks.
- Working as bridge, it capable of filtring LAN traffic.
Presented by:-
R.r. sTAR
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