gen-M: NETWORK DEVICES

14 Apr 2013

1. ROUTER

Hardware device designed to take incoming packets
Analyzing the packets
To the appropriate locations,
Moving the packets to another network,
Converting the packets to be moved across a different type of network interface,
Dropping the packets, or performing any other number of other types of actions.
A router has a lot more capabilities than other network devices such as a hub or a switch which are only able to perform basic network functions.

2. NIC

Short for Network Interface Card.
A NIC, also referred to as a "network adapter", is a printed circuit board containing the necessary hardware used to connect a computer to a network or other computer.

3. BRIDGE

A computer bridge is a device that connects two local-area networks (LANs), or two segments of the same LAN.
Unlike a router, bridges are protocol -independent.
They simply forward packets without analyzing and re-routing messages.

4. GATEWAY

An internetworking system capable of joining together two networks that use different base protocols.
A network gateway can be implemented completely in software.
Completely in hardware or as a combination of both.
Depending on the types of protocols they support.
Network gateways can operate at any level of the OSI model.
Appears at the edge of a network.
Related capabilities like firewalls tend to be integrated with it.
On home networks, a broadband router typically serves as the network gateway although ordinary computers can also be configured to perform equivalent functions.

5. HUB

When referring to a network, a hub is a basic networking device that connects multiple computers and/or other network devices together.
In general, a hub refers to a hardware device that enables multiple devices or connections to be connected to a computer.

6. SWITCH

A piece of a physical circuitry component that governs signal flow. Having the switch open allows the signal to flow through, while keeping the switch closed stops the flow and breaks the circuit connection.

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