Speed up Mozilla FireFox

1. Type "about :config" in the adress field.
2. Set the value of network.http.pipelining to "true".
3. Set the value of network.http.pipelining.maxrequests to "100".
4. Set the value of network.http.proxy.pipelining to "true"
5. Set the value of nglayout.initialpaint.delay to "0" (not availible in newer versions)

Heat Issues

Excessive heat can cause serious damage to your CPU and to any other components

inside your computer. The fan on the CPU pushes hot air away from the

CPU and into the case; case fans and power supply fans push hot air out the back

of the case. Front case fans pull cool air into the case.

The problems start with ribbon cables that impede airflow and clogged or

dying fans. Incautious drive installation can leave ribbon cables strewn all over

the case . Dirt, dust, hair, and age can slow down fans to the point

where they can’t do the job.

The warning signs will be there: spontaneous reboots, especially on warmer

days or with the heat blasting in winter time; occasional alarms from the tinny

PC speaker; lockups; excessively loud fans. The fix is easy. Check the fans and

replace when necessary.

Toubleshooting CPUs

CPUs are pretty robust beasts and rarely have problems after they’re installed.

You’re most likely to encounter problems with installation, although heat

issues can become a big deal at a later time.

Installation Problems

Look (and listen) for the following signs of installation problems:

• It’s normal for the CPU fan speed to fluctuate, but if the fan doesn’t

spin at all for more than 5 seconds or so, turn the system off and make

sure that the fan is plugged in correctly.

• If the fan is spinning but the PC doesn’t boot, make certain that any

jumpers governing speed or voltage are set correctly.

• If, after a few minutes, you hear a loud alarm, this is an indication that

the system is overheating. Turn it off immediately and check your fan

installation to make sure you’ve got good CPU/heatsink contact and

that the fan is functioning properly.

• If the system does not boot and the fan does not spin, check to ensure

that the CPU is seated properly and that no other components or

cables have been unseated or disturbed.

Cable

Cable is a bunch of wire which is used to transmit data or information within the network from one host to another host or from one network to another network. There are different kinds of cable but more importantly we use twisted pair cable.

1.  Coaxial Cable: - The coaxial cable is outdated now. This cable was used in prior with the BUS topology or Ring topology to establish the network. In this cable there lie two wires. One is the Copper wire which transmits the Analog Signal and another one is concentric wire which transmits the digital signal. The copper wire is protected with a white coloured inner sheath and the concentric wire is protected with a black coloured upper sheath. It looks same as the cable of TV. The connectors used with this cable are T-connector, BNC connector and the End connector. It has data transfer rate up to 10 MbPS. There are two kinds of coaxial cable:

     a.  Thicknet

     b.  Thinnet

2.  Twisted Pair Cable: - It is the 4 paired cables in which all the pairs are twisted together 6 turns per inch with each other. The 4 paired cables are in different colours. They are:

[a] Orange   -        Orange White

          [b] Green    -        Green White

          [c] Blue                 -        Blue White

          [d] Brown   -        Brown White

There are two kinds of twisted pair cable:

1.  STP (Shielded Twisted Pair Cable)

2.  UTP (Unshielded Twisted Pair Cable)

On the basis of Category (CAT) there are different kinds of cable:

a.  CAT1     >       2 paired cable       >       Bandwith / Data transfer rate 1-2 Mbps

b.  CAT2     >       4 paired cable       >       Bandwith / Data transfer rate 10 Mbps

c.  CAT3     >       4 paired cable       >       Bandwith / Data transfer rate 16 Mbps

d.  CAT4     >       4 paired cable       >       Bandwith / Data transfer rate 20 Mbps

e.  CAT5     >       4 paired cable       >       Bandwith / Data transfer rate 100 Mbps

f.   CAT5E  >       4 paired cable       >       Bandwith / Data transfer rate 1 GbPS/ 1000 Mbps

Among these categories, most we use CAT5 or CAT5E. Using CAT5, we can establish the network within 200 meters of long distance and using the CAT5E, we can establish the network within 500 meters of long distance.

The connector of twisted pair cable is RJ-45.

3.  Fiber Optic Cable: - The Fiber optic cable uses the light signal instead of electronic signal to transmit the data. Its connectors are SC and ST. Its metal sheath is highly polished through which light wave passes to transmit the data. It transmits the data in the speed of light. The transfer rate of this cable is 100-1000 Gbps.

computer and networking

Registry Maintenance

Your Registry is a huge database that Windows constantly updates. As a result,

the Registry tends to get clogged with entries that are no longer valid. These

usually don’t cause any problems directly, but they can slow down your system

Hard Drive Tools and Tasks

Keeping drives healthy and happy is a key task for every tech. Three tools enable

you to accomplish this task: Error-checking, Disk Defragmenter, and Disk

Cleanup.  “Hard Drives,” so

there’s no need to recap here how to run them. Just run them regularly!