background preloader

About Computing

Facebook Twitter

A Tiny Bit about some function and functionality of certain known definitions. .

Restarting Windows Without Restarting Your PC. How to Know When It’s Time to Replace Your Laptop’s Battery. No matter how well you treat your laptop’s battery, it will eventually die.

How to Know When It’s Time to Replace Your Laptop’s Battery

If you’re lucky, it will be time to replace your laptop by the time its battery dies. If you’re not, you’ll need to replace the battery.

Abbreviations & their meaning

Principes et fonctionnement d'internet. Hyperlink. Supprimer son compte et se désinscrire. How to Calibrate Your Laptop’s Battery For Accurate Battery Life Estimates. So you’re using your laptop and, all of the sudden, it dies.

How to Calibrate Your Laptop’s Battery For Accurate Battery Life Estimates

There was no battery warning from Windows — in fact, you recently checked and Windows said you had 30% battery power left. What’s going on? Even if you treat your laptop’s battery properly, its capacity will decrease over time. Its built-in power meter estimates how much juice available and how much time on battery you have left — but it can sometimes give you incorrect estimates. Raffreddamento laptop.

Lead time. A lead time is the latency (delay) between the initiation and execution of a process.

Lead time

For example, the lead time between the placement of an order and delivery of a new car from a manufacturer may be anywhere from 2 weeks to 6 months. In industry, lead time reduction is an important part of lean manufacturing. Journalism[edit] Lead time in publishing describes the amount of time that a journalist has between receiving a writing assignment and submitting the completed piece. Depending on the publication, lead times can be anything from a couple of hours to many months. Supply chain management[edit] A more conventional definition of lead time in the supply chain management realm is the time from the moment the customer places an order (the moment you learn of the requirement) to the moment it is ready for delivery.

How to Use the Traceroute Command. Traceroute is a command which can show you the path a packet of information takes from your computer to one you specify.

How to Use the Traceroute Command

It will list all the routers it passes through until it reaches its destination, or fails to and is discarded. In addition to this, it will tell you how long each 'hop' from router to router takes. Teleco.com.br. O Gigabit Ethernet (tanto o 1G como o 10G), quando utiliza o cabeamento de cobre (CAT-5, ou CAT-5e, CAT-6 ou seus predecessores), é a melhor escolha se o quesito for custo.

teleco.com.br

Entretanto, o legado de CAT-5 fica sujeito a distâncias menores que os 100 m desejados para os cabos estruturados melhores (CAT-5e, CAT-6 e superiores). Com certeza, a fibra óptica tem características que a tornam a melhor escolha, mas o seu custo (lembrando os tipos de interfaces e equipamentos) é bem superior que a infraestrutura de rede para cabo de pares metálicos. Transport Layer Security. Transport Layer Security (TLS) and its predecessor, Secure Sockets Layer (SSL), are cryptographic protocols designed to provide communications security over a computer network.[1] They use X.509 certificates and hence asymmetric cryptography to authenticate the counterparty with whom they are communicating,[2] and to exchange a symmetric key.

Transport Layer Security

This session key is then used to encrypt data flowing between the parties. This allows for data/message confidentiality, and message authentication codes for message integrity and as a by-product, message authentication. [clarification needed] Several versions of the protocols are in widespread use in applications such as web browsing, electronic mail, Internet faxing, instant messaging, and voice-over-IP (VoIP). An important property in this context is forward secrecy, so the short-term session key cannot be derived from the long-term asymmetric secret key.[3] Description[edit] History and development[edit] Secure Network Programming[edit] Dr. Notes. Secure copy. The term SCP can refer to one of two related things, the SCP protocol or the SCP program.

Secure copy

SCP protocol[edit] How it works[edit] Normally, a client initiates an SSH connection to the remote host, and requests an SCP process to be started on the remote server. SSH. Internet protocol suite. The Internet protocol suite is the computer networking model and set of communications protocols used on the Internet and similar computer networks.

Internet protocol suite

It is commonly known as TCP/IP, because its most important protocols, the Transmission Control Protocol (TCP) and the Internet Protocol (IP), were the first networking protocols defined in this standard. Often also called the Internet model, it was originally also known as the DoD model, because the development of the networking model was funded by DARPA, an agency of the United States Department of Defense. TCP/IP provides end-to-end connectivity specifying how data should be packetized, addressed, transmitted, routed and received at the destination. The TCP/IP model and related protocol models are maintained by the Internet Engineering Task Force (IETF). History[edit]

Telnet. Understanding Key Differences Between FTP, FTPS and SFTP. Understanding Key Differences Between FTP, FTPS and SFTP Posted by Van Glass on Mon, Jan 02, 2012 @ 11:56 AM Perhaps the most common protocols used in file transfer today are FTP, FTPS and SFTP.

Understanding Key Differences Between FTP, FTPS and SFTP

While the acronyms for these protocols are similar, there are some key differences among them, in particular how data are exchanged, the level of security provided and firewall considerations. Computer and network protocols; TCP / IP - OSI. The Defense Advance Research Projects Agency (DARPA) originally developed Transmission Control Protocol / Internet Protocol (TCP / IP) as a mechanism for connecting different networks in the U.S.

Computer and network protocols; TCP / IP - OSI

Department of Defense (DoD) in a way that communication can 'survive' in any conditions. Internet, international, very widespread international network (WAN) using TCP / IP protocol into an environment of institutional and government institutions worldwide. This protocol suite is widely distributed in commercial and private networks. In the following picture in the list that follows lists all the protocols used by TCP / IP connected environment. Graph that follows is compiled content TCP / IP model and the OSI model.