abdulrahman almolhem

أبريل 4, 2009

Laptop Security

يندرج تحت تصنيف : cisco network academy — abdulrahman @ 12:17 ص

  • OnGuardOnline suggests keeping these tips in mind when you take your laptop out and about 
  • Treat your laptop like cash. If you had a wad of money sitting out in a public place, would you turn your back on it – even for just a minute? Would you put it in checked luggage? Leave it on the backseat of your car? Of course not. Keep a careful eye on your laptop just as you would a pile of cash.
  • Keep it locked. Whether you’re using your laptop in the office, a hotel, or some other public place, a security device can make it more difficult for someone to steal it. Use a laptop security cable: attach it to something immovable or to a heavy piece of furniture that’s difficult to move – say, a table or a desk.
  • Keep it off the floor. No matter where you are in public – at a conference, a coffee shop, or a registration desk – avoid putting your laptop on the floor. If you must put it down, place it between your feet or at least up against your leg, so that you’re aware of it.
  • Keep your passwords elsewhere. Remembering strong passwords or access numbers can be difficult. However, leaving either in a laptop carrying case or on your laptop is like leaving the keys in your car. There’s no reason to make it easy for a thief to get to your personal or corporate information.
  • Mind the bag. When you take your laptop on the road, carrying it in a computer case may advertise what’s inside. Consider using a suitcase, a padded briefcase or a backpack instead.
  • Get it out of the car. Don’t leave your laptop in the car – not on the seat, not in the trunk. Parked cars are a favorite target of laptop thieves; don’t help them by leaving your laptop unattended. That said, if you must leave your laptop behind, keep it out of sight.
  • Don’t leave it “for just a minute.” Your conference colleagues seem trustworthy, so you’re comfortable leaving your laptop while you network during a break. The people at the coffee shop seem nice, so you ask them to keep an eye while you use the restroom. Don’t leave your laptop unguarded – even for a minute. Take it with you if you can, or at least use a cable to secure it to something heavy.
  • Pay attention in airports. Keep your eye on your laptop as you go through security. Hold onto it until the person in front of you has gone through the metal detector – and keep an eye out when it emerges on the other side of the screener. The confusion and shuffle of security checkpoints can be fertile ground for theft.
  • Be vigilant in hotels. If you stay in hotels, a security cable may not be enough. Try not to leave your laptop out in your room. Rather, use the safe in your room if there is one. If you’re using a security cable to lock down your laptop, consider hanging the “do not disturb” sign on your door.
  • Use bells and whistles. Depending on your security needs, an alarm can be a useful tool. Some laptop alarms sound when there’s unexpected motion, or when the computer moves outside a specified range around you. Or consider a kind of “lo-jack” for your laptop: a program that reports the location of your stolen laptop once it’s connected to the Internet.

مارس 17, 2009

the importance vitamins to human

يندرج تحت تصنيف : biology — abdulrahman @ 8:54 م

The importance of vitaminsVitamins are one of the most important nutrients for human body. To be healthy and for proper functioning of all human organs Vitamins are essential. Vitamins are essential for natural growth and development of every multi cellular organism. Right from the inception of a human fetus to old people, Vitamins are one of the most important supporting elements in their growth. During pregnancy period diets taken by a pregnant woman directly relates to the growth of fetus in womb. Therefore, Gynecologists suggest them to take diets according to the need of child developing inside their body. to human health

Popular Sources of Vitamins

You do not need to look for any special diet elements or medicines to fulfill the requirement of Vitamins in your body. Seasonal fruits and vegetables are rich source of Vitamins. Regular inclusion of them in your diet can protect you from all the deficiency diseases caused by improper intake of Vitamins

Classification of Vitamins

  1. Vitamin A – Retinol
  1. Vitamin B – There are several sub types of Vitamin B, with different scientific names.
  2. Vitamin B1 – Thiamine
  3. Vitamin B2 – Riboflavin
  4. Vitamin B3 – Niacin/Niacinamide
  5. Vitamin B4 – Adenine
  6. Vitamin B5 – Pantothenic Acid
  7. Vitamin B6 – Pyridoxine
  8. Vitamin B7 – Biotin
  9. Vitamin B8 – Inositol
  10. Vitamin B9 – Folic Acid
  11. Vitamin B10 – Pteroylmonoglutamic Acid
  12. Vitamin B11 – Choline
  13. Vitamin B12 – Methylcobalamin
  14. Vitamin C – Ascorbic Acid
  15. Vitamin D – Calciferol
  16. Vitamin E – Tocopherol
  17. Vitamin K – Menaquinones

As A Result… We Cant Live Without Vitamins .

مارس 7, 2009

RAM

يندرج تحت تصنيف : cisco network academy — abdulrahman @ 12:43 ص

“RAM” redirects here. For other uses of the word, see Ram.

Example of writable volatile random access memory: Synchronous Dynamic RAM modules, primarily used as main memory in personal computers, workstations, and servers.

Computer memory types
Volatile
Non-volatile

Random-access memory (usually known by its acronym, RAM) is a form of computer data storage. Today it takes the form of integrated circuits that allows the stored data to be accessed in any order (i.e., at random). The word random thus refers to the fact that any piece of data can be returned in a constant time, regardless of its physical location and whether or not it is related to the previous piece of data.[1]

This contrasts with storage mechanisms such as tapes, magnetic discs and optical discs, which rely on the physical movement of the recording medium or a reading head. In these devices, the movement takes longer than the data transfer, and the retrieval time varies depending on the physical location of the next item.

The word RAM is mostly associated with volatile types of memory (such as DRAM memory modules), where the information is lost after the power is switched off. However, many other types of memory are RAM as well (i.e., Random Access Memory), including most types of ROM and a kind of flash memory called NOR-Flash.

يناير 21, 2009

Hello world!

يندرج تحت تصنيف : Uncategorized — abdulrahman @ 12:24 ص

مرحبا بكم موقعي Riyadhschools.net. هذه هي رسالتك الأولى تستطيع التعديل أو الحذف أو كتابة رسالة جديدة!

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