William Schockard was born in 1592 in Germany he was a universal scientist, and a professor in astronomy. While he was in college he mainly researched mathematics, and astronomy. Schpckard was also one of the first people to build a working calculating machine back in 1623. The calculating machine that he invented and built was designed to calculate astronomical tables. The machine that he built could only perform simple tasks such as add and subtract only six digit numbers.
Konrad Zuse was not the inventor of the first computer, but he invented the first computer that was fully functional and programmable. Zuse’s original computer was destroyed in 1943 when the allies bombed Berlin, so there are only replicas available. All photos, and original documents of the machine were destroyed when the Allies bombed Berlin. Some facts about his computer are that the original one consumed over 4000 watts of electricity, it took .8 seconds to add & 3 seconds to multiply, and it weighed over 2,200 pounds.
Early computers were all hand built because there was not enough demand for them. The demand for the computer was not great because they were very expensive. It cost $666.66 ($2,500 adjusted for inflation 2009) for the Apple I that was introduced to the public in 1976. Also, the early computer could only perform simple tasks such as running a spreadsheet program.
Many of the modern computers that are made today are designed to be lightweight, and be very cheap. Besides the advantages of having a small computers with the low cost and portability, there are many disadvantages when it comes to small and cheap computer. First when you have a small computer, there is less space, and the components become smaller and the electronics tend to become very hot and overheat. Also, when computers are becoming cheaper then the parts become more mass produced and then today’s computers are not are durable as they were 5 years ago. As technology evolves, then the computers that are made today are hundreds of times more powerful regarding processor speed. Also, in the 1900s when computers were first invented they consumed about 20,000 watts of electricity, and today computers can use as little as 30 watts of power
Keeping a work environment clean is important because of many reasons. -when dusk gets between metal contacts, it could cause a device to not work properly -always use a antistatic mat an antistatic wrist strap because static electricity can short out electrical components causing them not to work.
Always unplug before servicing anything, because if you don’t, you could receive a potentially deadly shock. Also, some of the electronics that make up a computer retain energy when you unplug a computer, so first unplug the device, and wait a couple minutes. Unplugging a computer could also reduce energy costs, come of the components in a computer can still consume energy even when the computer is off.
It is always important to remove anything that is conductive from your hands and wrists because if you don’t you can get a electrical shock and you can short out electrical components.
Capacitors look like small batteries and they are deceiving because you cannot visibly tell if they are currently storing electricity. Some capacitors can store electricity for a period of time even when they are disconnected from a power source. To discharge a capacitor you should get a screw driver and touch the two leads, and then the capacitor is safe to touch or handle.
Never service parts that are not designed to be serviced because they contain sensitive parts that are not made to be touched. Some parts are not designed to be serviceable because parts are not available for the product, and some items can be serviced, but by only a qualified professional.
The CPU is commonly referred to as the brain of the computer because it is the place were most calculations of the computer take place. Also, the CPU is the most important element of a computer
RAM is a volatile type memory which means that it will lose all of its contents once power is lost to the chip, compared to a hard drive which keeps its contents stored even when the power is lost. RAM is a type of computer memory that stores all of your applications and files that are open on the computer. How RAM works is that when you open a application the computer loads the application from the hard drive to the RAM in which it runs from until you close the application.
Having enough RAM is important because if you do not have enough them you computer will suffer from some serious computer performance issues. Also,
A hard drive is a non-volatile type of storage that magnetically stores data on a platter. The hard drive is also a important part to a computer because it stores all of the user and required information. Hard drives are very fragile because it has a precisely balanced disk and even the slightest bump can knock off its alignment. If the hard drive is damaged in any way you can lose everything on the disk. Even the smallest piece of dusk could cause irreparable damage.
The motherboard is a computers primary circuit board that which all of the components components and perfirerals connect to.
A video is important to a computer because without one you would not be able to display any graphics that the computer is trying to display. Also, video cards come in two different types: separate expansion cards, and video cards that are imbedded into the motherboard. The main difference between the two types of video card is that the separate cards are better because you can pick the type of card you want want.
These are just some of the major Industry recognized certifications in order to be a networking professional. The four listed above are just some of the certifications that can give you a high chance of getting a job. These certifications are listed in order from lowest to highest from the lowest earning to lowest salary, and the highest earning the highest earned salary.
The CompTIA A+ certification is an industry standard certification for computer support technicians. The A+ certification proves the competence in areas such as installation, preventative maintenance, security, troubleshooting, and networking. You also have to be excellent in customer service skills, and the ability to work good with people.
The CCNP mainly focuses on the scalable of switching & routing. Also, to obtain this certification you must complete any of the two of the four certifications.
Computer History SGP
The Evolution of Computers
• While computers have been around for
decades their components inside keep
evolving. In order to keep up with this
evolving technology a Network
Administrator will need to receive the
proper certifications and training.
The Evolution of the Computer
Invention of the First Computer
• The design for the first computer was made by
• Schockard’s computer was a calculating machine
designed to calculate astronomical tables
• His machine also could add or subtract six digit
The Invention of the First Programmable
• The first programmable computer was
invented in May 1941 by Konrad Zuse
• Zuse’s computer was used to solve
• Zuse’s Computer weighted over 2,000 pounds
• The internal parts are similar to the modern
The Invention of the First Programmable
• Early computers were all hand built
• They were slow and could only perform simple
• They were expensive
Modern Computers Today
• Most computers made today are cheap,
portable, & lightweight
• Compared to computers from the 1970s,
computers today are
Working Safely When Repairing a Computer
• Always work in a clean, dusk free environment
• When working with circuit boards always wear
a anti-static wrist strap
• Lay all parts removed on an antistatic mat
Always Unplug The Computer
• Unplugging a computer helps protect you
from a potential deadly electric shock
Remove all Hand Jewelry
• Most Hand Jewelry is conductive which can
result in a electrical shock
• Hand jewelry should also be removed when
working with moving parts
• Capacitors are miniature “Batteries” that can
hold a electrical charge after a computer is
disconnected from power
• When working on a computer always
disconnect the power then wait a few minutes
for the capacitors to discharge
Never Attempt to Service Non-Serviceable Parts
• Non-serviceable parts
are parts that are not
designed to be
replaced by anybody
Major Computer Components
• Hard Drive
• Computer Case
• Video Card
• Sound Card
• Computer Case
Central Processing Unit (CPU)
• It is the most important element of a
• The CPU is the brain of the computer
• CPU is the part of the computer that controls
and executes all tasks that the computer is
Random-Access Memory (RAM)
• RAM is a type of computer chip that stores all
of the dynamic data on the computer
• By storing all of your dynamic date in RAM, it
makes data access faster than a hard drive
Why is RAM important?
• RAM is important because the lack of RAM is
usually the main bottle neck in computer
Hard Disk Drive
• A hard drive is a device that magnetically
stores data on a spinning disk
• It is a non-volatile type of storage
• It is a printed circuit board that holds all of the
principle components that make up a
• It is a expansion card that generates images to
be displayed on a monitor
• Many modern video cards have capabilities to
display 3D images, and live TV
• It is a card in the computer case that
translates computer code into audio signals
• Most computers have sound cards built into
the motherboard, but some require a separate
Optical Disk Drive
• It is a type of disk drive that uses laser light to
read to and from disks
• Most drives today commonly can read & write
• The most common name for a optical disk
drive are: CD burner & DVD burner
• It is the enclosure that holds all the main
components for a computer
CompTIA A+ Certification
• Most Popular entry level certification
• Certification is about the fundamentals about
Computer, Network, & Security technology
CompTIA A+ Certification
• Certification for people with 6 months or less
in computer service
• Average salary with A+ certification is about
$31,000 a year in 2005
• Certification proves a technicians competency of
maintaining, installing, troubleshooting, &
configuring a basic computer network
• Average salary a year is $38,000
Cisco Certified Network Associate
• Certificate is a major milestone for many IT
• Certification designed for people who install,
operate, or configure Cisco routers or switches
• Average Yearly salary is $63,000
Cisco Certified Networking Professional
• The CCNP certification is designed to
demonstrate advanced skills in networking
computers, but especially in installation and
support in medium sized networks.
• Yearly salary is $73,000