How to Manual Unit 9- Maintenance and Troubleshooting

Unit 9:?Maintenance and Troubleshooting?1.List and describe the eight calculating machine virus types. Be real to include entropy about how they argon bed banquet, and strength damage they force out ca expenditure. (1.) BIOS virus ? This virus is designed to truss data cognitive processors with Flash BIOS. potence damage includes; rewriting the BIOS mandate so the computer does not nurture. (2.) heyday sector (MBR) virus ? These vir utilises spread whenever the exploiter boots kill a plow. The virus replaces or alters in varianceation in boot sectors or in the Master Boot Record. (3.) File virus ? Replaces or attaches itself to a charge up that has a COM or EXE extension ( practicable archive). And be sparkleed for a particular type such as a date, load into the RAM and drive oppositewise COM or EXE files. Attaching itself to this type of file, a virus tug out pr prove the computer programme from starting or operating properly. (4.) macro virus ? Written in a specific diction and attaches itself to a schedule created in a specific industry (Excel or Word). Once the infected document is opened and implike into reminiscence, the virus preempt attach itself to other documents. (5.) fifth column dollar program ? Before a Trojan horse program deal attack, it mustiness first watch hold a elan to entice the victim to reduplicate, turn up outload and run it. Few mass knowingly run a cattish program, Trojan horses must disguise themselves as other programs that the victim believes to be spotless (games, utilities, or popular applications). It stub entrance files, folders, or your wide outline. Trojans create a backdoor or a trapdoor, which elicit be utilise to send your face-to-face information to a nag at another attitude for use at a later date. (6.) Stealth virus ? When an antivirus program runs, a theft virus compensates itself in memory and uses various tricks to besides hide changes it has made to any files or boot records. The ! virus whitethorn deem a copy of the original, clear data and proctor system activity. When the program attempts to access data that has been altered, the virus redirects it to a storage bea concording the original, uninfected data. (7.) Polymorphic virus ? A virus that changes its virus tactual sensation (binary pattern) every time it replicates and infects a untried file in regularise to affirm from universe detected by an antivirus program. every time it infects a legit executable file it does so by altering the appended malicious code, in order to avoid antivirus detection. It is alike able to append its code at random locations at heart the legit executable, a technique c whollyed mid-infecting. (8.)Worm virus ? This is a program which copies itself cross directions a ne dickensrk. A computer worm roll in the hay spread without a forces program, although whatsoever modern computer worms likewise use files to hide inside. A worm virus is malicious software pa ckage product program that green goddess either torpid your system down to a creeping or hamper it completely. And a worm virus stand even debar or disable entire legions. 2.Describe the office of the system unsex utility program and explain how and when it is used. System Restores intend is to return your system to a workable demesne without requiring a complete reinstallation and without whippy your data files. The utility runs in the place setting and mechanically creates a animate point when a trigger event occurs. Trigger events include application installations; auto update installations, utility recoveries, and manual creations of restore points. The utility also creates restore points at once a day by default. 3.Explain how to find the modish illusion codes for your motherboard. I do not know, because I cannot find my own. 4.List at least four tips you competency suggest to a user after a repair. (1.) Every now and then fling off a restore point man ually(2.) Always make a restore point before install! ing newfound software. In addition to new software, also make a restore point before installing a new strain of existing software and prior to installing solicit fixes (patches and updates). (3.) befuddle the motorcar and use the F8 key to start Windows move on Options menu just as if you were going into safe mode. so chose the option to boot to proficient Mode with Command agile. This disables more of Windows than regular full Mode does. (4.) Try booting to Safe Mode with Command Prompt now, while every matter is working correctly. 5.Explain how to identify, prevent, and troubleshoot virus problems. (1.) make outing a virus; Try a scan in safe mode and that should handle just about any transmission system. You can visit an online scan to look on it you form anything worse. Another thing to consider is your remember rate. Since your icons look to have little or no info as they appear, could in that location be things travel rapidly in the background cons uming machine cycles and slowing down your refresh rate?(2.) Preventing a virus; Install a latest version of an anti-virus software program (Norton Anti-Virus or McAfee Virus-Scan), keep the virus information file up to date so that the software can recognize new viruses as they appear. automatise the process of updating the virus information, so that your anti-virus software depart maintain itself once you install and configure it properly. (3.) Troubleshooting a virus; (A.) Identify the threat, (B.) Identify the computers infected, (C.) Quarantine the computers infected, (D.) Clean the computers infected, and (E.) Determine infection sender and prevent recurrence. 6.Identify the four procedures for maintaining your operating system. Explain wherefore they are im appearanceant. (1.) Scan and study viruses from your hard drive. By chitchat for viruses a user lead not stand files, drives or programs that willing be destroyed and the user will lose all data on their OS . (2.) Use dish kill to aim unsuitable files fro! m your hard drive. criminal record cleanup is used to remove files that are not in use any seven-day (temporary internet files). (3.) Use disk defragmenter to reorganize your file social system on the hard drive. Files become fragmented because of the way clusters are re-used and allocated on a hard disk. If you delete a file that take a leaks up two clusters, and then write a file that takes four then the new file might be split - two clusters where the old file was, and two clusters somewhere else entirely. Multiply that scenario by thousands of file operations and deletions on your disk every day, with much larger files and you can see that fragmentation can add up very quickly. The result is your machine gradually slowing down. (4.) Activate Windows firewall to keep computer hackers from accessing your computer. Windows Firewall is a host-firewall technology that inspects and filters all IP version 4 and IP version 6, network business. As a firewall, Windows Firewall tr acks the state of to each one network connection and determines whether the unsolicited launching traffic should be allowed or dropped. Windows Firewall blocks incoming traffic unless the traffic is a solution to a request by the host (solicited traffic) or it is specifically allowed. 7.Explain the steps to maintain and update antivirus software. (1.) This is the or so critical fulfill one can take to reduce the likelihood of an attack. cease all bonifaces at least weekly for compliance with think of to all available good Packs, patches and hot fixes. Once a bug or pic is made public, hackers begin to depend for systems that have not been ? patched?.

The possibility of an attemp ted transport increases with each passing day. (2.) ! manipulate that all users have hefty passwords. The only thing stand mingled with a potential intruder and complete mark of your emcee is your decision maker enabled flier password(s). If an attacker can obtain the password for an account with executive director privileges, they can do anything. Each and every account with administrator rights should have a strong password. Individual user accounts should also have strong passwords, scarce thither are humans factors which may limit your ability to enforce stricter password policies on the mean(a) user. (3.) Provide at least a tokenish take aim of physical security for all servers. Every server should be behind a locked door with access hold in to only those individuals who have a legitimate need for access. When at that place is no one working at the server solace, the solace session should be either logged out or ?locked? so that a password is required to gain access. The server potency should be arranged in a way that passel international the room cannot see the keyboard (thus seeing users/admin passwords).Written evidence of user ID?s and passwords should not be left lying almost the server room. (4.) Implement financial backing procedures for all systems. piddle and maintain backup copies of at- least the data files on all servers. Backups should be created on a regular basis using well conceived procedures that should include some form of off- focalize storage of backup media in case of handout of the facility. Create and maintain a current Emergency remediate Disk (ERD) for all systems. Regularly test your restore procedures to insure that your backups are valid and restorable. (5.) Use up-to-date anti-virus software. Anti-virus software on a server may not stop hacking attempts, but they can detect many of the ?Trojan horse? programs that hackers frequently use to ?sneak? into your systems. After installing anti-virus software, be sure that you routinely update the vi rus information to ensure that the software will be a! ble to detect all virus, including the most late discovered ones. (6.) Block access to/from any extra transmission control protocol/UDP (Transmission Control Protocol/ User Datagram Protocol) ports. Use any(prenominal) means at your disposal to block access to the ports on your server that there is no legitimate use for. The most common and efficacious way to block access to these ports is the use of a firewall. Firewalls can be separated into two categories:?personal Firewall- A ?personal? firewall can be installed on the server itself and can be extremely effective at block off unwanted traffic to and from your server. ?Network Firewall- This type of firewall is placed on the campus network, between your server and the ?rest of the world?. The network firewall?s clientele is to block access to/from any particular port on your server. Computing and Communications will offer a firewall ?divine service? in the next few months. References:Schmidt, C. A. (2008). ?The Complete A+ occupy to PC Repair?. Fourth Edition. Boston: Addison-Wesley. Chapters 12 & 16. (2009). ?What is a Polymorphic Virus?. Wise Geek. Retrieved November 14, 2009, from weathervane send: www.wisegeek.com(2009). ?What is a Stealth Virus?. Wise Geek. Retrieved November 14, 2009, from Web site: www.wisegeek.com(2009). ?What is disk defragmentation?. Windows Microsoft. Retrieved November 16, 2009, from Web site: www.windows.microsoft.com(2009). ?What is Anti Virus?. security Search.Com. Retrieved November 16, 2009, from Web site: www.searchsecurity.techtarget.com If you want to get a practiced essay, order it on our website: OrderEssay.net

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