The HUB is
a server and has admin roles. It controls the functioning of the network. Hub poll
each user, checking if it need to use the network. Many cables are used, if one
cable fails the network will still work. Hubs are cheap and simple devices that
can connect bunch of computers to each other but they are a little bit wasteful
( Bandwidth is a term
for data transfer per second.) Available at: https://www.lifewire.com/what-is-bandwidth-2625809.
When a computer sends an
information to a hub, it duplicates the data on all other interfaces. Each
incoming bit is duplicated on all other interfaces. It is the simplest and
cheapest way to create a network, however, it does cause a lot of unnecessary
traffic. (If you have five hosts in the network, hubs unnecessarily send every
packet to those who are not interested of what is sent. This is a huge waste of
bandwidth also other people in the network can see each other’s traffic if they
use free software.
Switch is a PC organizing gadget,
which can interface gadgets together into a PC coordinate with the assistance
of utilizing bundle changing to gather, process and fare information to the
particular gadget that you have picked. Switches are gadgets that they have
loads of ports which can interface together different gadgets, numerous links
are connected to a change gadget to be able to impart between them. System
changes can figure out how to exchange information over a system with a great
deal of gadgets. Additionally the gadgets that they are interfacing with a
system switch can be recognized by the IP of the gadget which that enables the
change to coordinate the movement and deal with the security and the
proficiency of the system.
It is basically kind of like a
network surge protection. When the switch is connected to a router, its ports
acts like they are routers, so, more computers can be connected. The switches
have different sizes of preference of usage. Unlike HUB, switches use network cards
inside the computer to identify different computers with their MAC address. So
each computer has their own private network. When four computers are connected
to switch, let’s say computer 1 wants to send a document to computer 4, at
first switch does not know which computer to send the file so it sends all the
computers and identifies computer 4’s MAC address and saves it into its memory.
Tim Fisher. 2017. What is
Bandwith?. ONLINE Available at: https://www.lifewire.com/what-is-bandwidth-2625809.
Accessed 10 January 2018
Switch illustration: http://keywordsuggest.org/gallery/314351.html
Hub illustration: https://fthmb.tqn.com/KkJhU8Rb1SA_Y5h_0CABAzwC95Y=/768×0/filters:no_upscale()/wired-diagram-3-58073d293df78cbc28f5ba06.jpg