الصفحة الرئيسية
الشركة
الحلول
المشاريع


مركز المعلومات   
الأسئلة التكرارية      
دليل استخدام لوحة التحكم     
شرح بالصور     
مركز التحميل     
مصطلحات الإنترنت     
روابط مفيدة     
بطاقات الدعم الفني    
فتح بطاقة جديدة     
فحص بطاقة سابقة     
مصطلحات الإنترنت
هنا ستجد وصفاً دقيقاً لمعظم مصطلحات الكمبيوتر والإنترنت شيوعاً بين المستخدمين.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

[V]
Vacation Message
A message automatically sent as a reply to any message received in a specified mailbox, in this case to inform the original sender that the recipient is away and will not be able to respond. Also known as an autoresponder.
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Virtual
Simulation of the real thing. Means "almost" or "in effect only". You will see this term appear before various computer terms to indicate simulation technology that enables you to cross boundaries and experience something without requiring its physical presence. The Internet is also seen as a "virtual" world.
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Virus profiling
Virus profiling uses a scoring system to determine the likelihood that the message contains a virus. There are certain attributes that make a message inherently risky. We check those attributes first and block those messages outright. Next, the profile software compares the message body, subject line, attachment name, attachment file type, and other message attributes against a database. The database contains attributes that are indicative of known virus or worm characteristics. Virus profiling is not an exact science. Some viruses are very proficient at masking themselves by varying these attributes, and making it more difficult to detect their presence through profiling.
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Virus scanning
Virus scanning is done by actually scanning a file and seeking certain attributes that define it as a virus, based on the scanning software’s definitions. This is not possible on any mail server because viruses are contained within attached files. Since mail can only be transferred in ASCII text format, any attached file is encoded into ASCII text. The only way for a mail server to perform virus scanning is if the messages are decoded on the server, scanned, and then encoded for final transport to the recipient. This is not feasible, given the amount of time required to complete this process. Thus, virus scanning must be done on the local computer, and as a result is the responsibility of that computer’s owner.
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