Skip to content

Hardware in Networking

August 3, 2009
tags:

Network
In general, the term network can refer to any interconnected group or system.
Basic Hardware Components in a network
All networks are made up of basic hardware building blocks to interconnect network nodes, such as Network Interface Cards (NICs), Bridges, Hubs, Switches, and Routers.
In addition, some method of connecting these building blocks is done by, usually in the form of galvanic cable (most commonly Category 5 cable). Less common are microwave links (as in IEEE 802.11) or optical cable (”optical fiber”).
1. Network Interface Cards
A network card, network adapter or NIC (network interface card) is a piece of computer hardware designed to allow computers to communicate over a computer network.

It provides physical access to a networking medium and often provides a low-level addressing system through the use of MAC addresses.

It allows users to connect to each other either by using cables or wirelessly.

2. Repeaters
A repeater is an electronic device that receives a signal and retransmits it at a higher level or higher power, or onto the other side of an obstruction, so that the signal can cover longer distances without degradation.

Repeaters work with the actual physical signal, and do not attempt to interpret the data being transmitted, they operate on the Physical layer, the first layer of the OSI model.

3. Hubs
A hub contains multiple ports.

When a packet arrives at one port, it is copied to all the ports of the hub.

When the packets are copied, the destination address in the frame does not change to a broadcast address.

It does this in a rudimentary way, it simply copies the data to all of the Nodes connected to the hub.

Advertisements
No comments yet

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: