vineri, 25 mai 2012

About Eset Nod 32

About the best antivirus - Eset Nod 32

ESET NOD32 Antivirus, commonly known as NOD32, is an antivirus software package made by the Slovak company ESET. ESET NOD32 Antivirus is sold in two editions, Home Edition and Business Edition. The Business Edition packages add ESET Remote Administrator allowing for server deployment and management, mirroring of threat signature database updates and the ability to install on Microsoft Windows Server operating systems. The first version of NOD32 - called NOD-ICE - was created in 1987 by Miroslav Trnka and Peter Pasko when computer viruses were becoming increasingly prevalent.

Initially the program gained popularity with IT workers in Eastern European countries, as ESET was based in Slovakia. Though the program's abbreviation was originally pronounced as individual letters, recent worldwide use of the program has led to the more common single-word pronunciation, sounding like the English word nod. The company reached its 6000th update to virus definitions on March 30, 2011.
The acronym NOD stands for Nemocnica na Okraji Disku ("Hospital at the end of the disk"), a pun related to the Czechoslovak medical drama series Nemocnice na okraji města (Hospital at the End of the City).
Mail Security for Microsoft Exchange Server
On March 10, 2010 ESET released ESET Mail Security for Microsoft Exchange Server, which contains both antimalware and antispam modules. It supports Microsoft Exchange 5.5, 2000, 2003, 2007 and 2010.
Mobile Security
ESET Mobile Security is the replacement for ESET Mobile Antivirus, which provided anti-malware and antispam functionality. ESET Mobile Security contains all the features of the older product and adds new anti-theft features such as SIM locking and remote wipe as well as a security audit and a firewall. Versions for Windows Mobile and a Symbian OS version are currently available for both home and enterprise users.
Remote Administrator
ESET Remote Administrator is a central management console designed to allow network administrators to manage ESET software across a corporate network.
Smart Security
On November 5, 2007, ESET released an Internet security suite, ESET Smart Security version 3.0, to compete with other security suites by other companies such as McAfee, Symantec, AVGand Kaspersky. ESET Smart Security incorporates anti-spam and a bidirectional firewall along with traditional anti-malware features of ESET NOD32 Antivirus.
On March 2, 2009, ESET Smart Security version 4.0 was released, adding integration of ESET SysInspector; support for Mozilla Thunderbird and Windows Live Mail; a new self-defense module, an updated firewall module, ESET SysRescue and a wizard for creating bootable CD and USB flash drives. There were initially compatibility problems between ESET Smart Security 4.0 andWindows Vista Service Pack 2 but these were remedied by an update.
On August 17, 2010, ESET Smart Security version 4.2 was released with new features, enhancements and changes.
SysInspector
ESET SysInspector is a diagnostic tool which allows in-depth analysis of various aspects of the operating system, including running processes, registry content, startup items and network connections. Anti-Stealth Technology is used to discover hidden objects (rootkits) in the Master Boot Record, boot sector, registry entries, drivers, services and processes. SysInspector Logs are standard XML files and can be submitted to IT experts for further analysis. Two logs can be compared to find a set of items not common to both logs. A log file can be saved as a service script for removing malicious objects from a computer.
Other programs
ESET has released free standalone removers for malware when they are widespread, such as Mebroot and Conficker.
In July, 2009, ESET released a program called ESET Uninstaller to help uninstall ESET NOD32 Antivirus and ESET Smart Security versions 3 and 4.

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Open Un convertor analog-numeric accepta la intrare un semnal continuu în timp x(t) sub forma unei tensiuni electrice si furnizeaza la iesire o secventa de numere binare x(n), care aproximeaza esantioanele corespunzatoare x(nTe). Pentru majoritatea aplicatiilor, tensiunea electrica de intrare nu este furnizata direct CAN-ului, ci printr-un dispozitiv numit element de esantionare si retinere (memorare) – sample-hold (S/H). Elementul S/H este un circuit analogic care masoara semnalul de intrare în ritmul unui tact (multiplu de Te) si mentine acest semnal fixat pentru un interval de timp suficient de mare pentru ca operatiunea de conversie analog-numerica sa se poata realiza. Deoarece operatiunea de conversie analog-numerica este relativ lenta, este important ca o eventuala variatie a tensiunii de intrare sa nu perturbe procesul de conversie, si prin urmare circuitul S/H previne aceste perturbatii prin mentinerea constanta a tensiunii de intrare pe durata desfasurarii unei conversii. Circuitele S/H sunt alcatuite de regula dintr-un buffer urmat de un comutator electronic conectat la un condensator. Operatiunea de esantionare si retinere (sample and hold) consta în urmatoarele etape principale: 1. La un moment de esantionare, comutatorul electronic conecteaza bufferul si condensatorul la semnalul de intrare; 2. Condensatorul se încarca cu tensiunea de intrare; 3. Sarcina condensatorului este mentinuta atâta timp cât CAN-ul converteste semnalul; 4. Daca sunt mai multe canale conectate (multiplexate) la un CAN, etapele anterioare sunt repetate pentru fiecare canal de intrare; 5. Întregul proces este repetat la urmatorul moment de esantionare. Un circuit de intrare analogica utilizat pentru esantionarea semnalelor contine de regula un multiplexor, un circuit S/H si un CAN – Fig. 3.8. Circuitul S/H contine bufferele de intrare si de iesire de tip amplificator BI si BO, translatorul de nivel TN care asigura executia corecta a comenzii de esantionare/memorare, comutatorul (cheia) electronic CE si condensatorul de memorare C. Atunci când CE este închis circuitul este în asa-numitul regim de esantionare sau de urmarire, iar când CE este deschis – regimul de memorare. Observatie: Din punct de vedere al modului de esantionare, hardware-ul de achizitie poate realiza o esantionare secventiala a canalelor de intrare sau o esantionare simultana (simultaneous sample and hold – SS/H). O data realizata esantionarea – adica preluarea esantioanelor din semnalul de intrare, semnalul esantionat trebuie convertit din tensiune (asa cum se afla la iesirea circuitului S/H) într-un numar binar pe care sistemul de calcul îl poate citi si prelucra. Conversia semnalului esantionat, caracterizat de valori ale amplitudinii infinit precise, în numar binar se numeste cuantificare. În timpul cuantificarii, CAN-ul foloseste un numar finit de valori pentru reprezentarea semnalului analogic. Numarul de valori este determinat de numarul de biti utilizati pentru conversie (CAN-urile moderne utilizeaza de regula 12 – 16 biti).