Tips to make computer networks (LAN / Local Area Network)

computer network? what network? we often hear, but we dont know what it is.
we can imagine like our bodies network (network cells). in our bodies, every device that is connected to each other,
function with each other to work together, although each has a function of levying their own.


a system of said computer network if there is a single computer model that serves all of the tasks
computing an organization has been replaced by a set of computers that many fragmentary but
each other in performing its duties.

other definition of a computer network is a collection of computers, printers and other equipment that
connected in one unit. Information and data moving through the cable-cable or without cable, so
allows network computer users can exchange documents and data, print on a printer
together and jointly use the hardware / software that is connected to the network.

Benefits of Network Computers:

* Resource Sharing, you can use existing resources together. Eg a user who
located 100 km away from the data, does not have difficulty in using this data, as though
data is located in close proximity to us. This often means that troubleshooting computer network distance.

* Reliability, with the computer network we will have a high reliability with the resources have
alternative supplies. For example, all files can be saved or copied to two, three or more computers that
connected to the network. So that when one engine was damaged, the copy machine in the other can be used.

* Save money. Computers have a small ratio of price / performance is better than the
a large computer. Mainframe computers have such great speed approximately ten times the speed
small computer / personal. However, the price Mainframe thousand times more expensive of computer time. Imparity
the ratio of price / performance and speed of this is to make the system designer to build a system that consists of
personal computers.

The steps:

To create a small computer network (LAN), there are some equipment and materials that we need such as:

* Cramping

* Lan Tester

* Cable UTP (Unshielded Twisted Pair) / coaxial (rarely used)

* RJ45 Connector / coaxial cable connector

* Switch hub * min-2 units PC (Personal Computer) with LAN Card, or NIC (Network Interface Card)

Then we define the order of UTP cable that we will use in accordance with its function. eg if we wanted
connect directly from PC-PC, we use the cross, if kia-connect switch to hub first, PCHUB,
then we use straight. if we want to connect 2 LAN HUB-HUB then we use the cross,
we can also use the STARIGHT if there is one hub uplink port.

for ease in remembering the order of the cable, we can use one of the ways that I use, namely
Straight -> if OBHC Cross -> HBOC.

Straight -> OBHC

O -> white orange - orange

B -> white green - blue

H -> blue white - green

C -> white chocolate - chocolate

Cross -> HBOC

H -> white green - green

B -> white orange - blue -

O -> white blue - orange

C -> white chocolate - chocolate

if you have another way please apply, I must be as above. then please each end
tested using lan tester. if the lamp lights according to the expected, then you have succeeded in
Cramping process. please lan card installed on your PC.

to set the IP so that we think about is how no group IP that is used on your LAN. usually for
local network using the IP group 172.17.XX, 192.168.XX 202.168.XX or 10.10.XX to the local network,
minimal set is:

IP address: 192.168.1.2 (example)

Subnet mask: 255.255.255.0 (example)
for the default gateway you can fill in if you want to connect your local network with external networks (both
local network or other internet). for the DNS server you will be content if you are connected to the internet. This DNS server
depending on the rules established by the provider, Telkom Speedy, etc..

if you have no IP set, you can check whether your computer can communicate with
other computers, that is the way to run the ping command in the command, such as

ping 192.168.1.3

(this command produce 4 times the response), to continue to provide the response we add the attribute-t (trace),
like

ping 192.168.1.3-t

No response was given 3 kinds:

1. reply from ....

your computer can communicate with the purpose of your computer.

2. request time out ....

network connectivity problems with the purpose of your computer.

3. destination unreachable ....

network connection to your computer problems.