Monday, June 29, 2009

July Computer Classes

Basic Computer Instruction

7/02/09 Basic Computing and E-Mail
7/03/09 Basic Computing and E-Mail
7/06/09 Basic Computing and E-Mail
7/09/09 Search Engines/Google
7/16/09 Search Engines/Google
7/17/09 Search Engines/Google
7/20/09 How to Clean WindowXP
7/23/09 How to Clean WindowXP
7/24/09 How to Clean WindowXP
7/27/09 Word Tutorial
7/30/09 Word Tutorial
7/31/09 Word Tutorial

EACH CLASS WILL BE OF ONE HOUR DURATION
CLASSES START AT 6PM AND FINISH AT 7PM
FRIDAY CLASSES WILL START AT 2PM AND FINISH AT 3PM


Posted by Ray Brennan, MLIS, MPA at 12:50 PM

1 comment:

  1. Ray Brennan, MLIS, MPAJuly 14, 2009 at 7:36 AM

    What are Computer Viruses?

    If one is anxious to know what is a computer virus it is for certain that he might get a lot of answers which might appear to be complex. However the case is different in reality... There are certain basic issues involved in understanding the issue on what is a computer virus. A computer virus is a self-replicating computer program that behaves like a biological virus. It spreads by inserting copies into other executable code or documents. Similiarly like the biological virus it spreads on its own by multiplying itself throughout the system, just like the biological virus that spreads by inserting itself into living cells.

    There are different types of viruses. Some of the prominent ones are Trojan horses, worms, and email viruses. The Trojan horses are computer programs which pretend to do one thing but actually do damage when they start it. The worms viruses are pieces of software that use computer networks and security flaws to create copies of itself. A copy of the worm will then scan the network for any other machine that has a specific security flaw, and then replicate itself to the new machine. With regards to email viruses, these use email messages, and usually will copy and automatically mail itself to hundreds of people.

    There are two generalities of viruses, including resident and nonresident viruses. Resident viruses are those viruses that contain a specific replication module which is alarmingly similar to t hose employed by nonresident viruses. A resident virus is one that stays in memory after it executes, and even after its host program is executed. Resident viruses are often subdivided into categories like fast infectors, and slow infectors. Fast infectors are those particular viruses which are designed to affect as many files as possible and slow infectors are designed to infect hosts infrequently. For instance some slow infectors will only infect files when they are copied.

    ReplyDelete

Subscribe to: Post Comments (Atom)