Digital Technology World

hile TCP/IP is the newer model, the Open Systems Interconnection (OSI) model is still referenced a lot to describe network layers. The OSI model was developed by the International Organization for Standardization. There are 7 layers: Physical (e.g. cable, RJ45) Data Link (e.g. MAC, switches) Network (e.g. IP, routers) Transport (e.g. TCP, UDP, port numbers) Session (e.g. Syn/Ack) Presentation (e.g. encryption, ASCII, PNG, MIDI) Application (e.g. SNMP, HTTP, FTP) People have come up with tons of mnemonic devices to memorize the OSI network layers. One popular mnemonic, starting with Layer 7, is “All People Seem To Need Data Processing.” But one that I’m partial to, which starts with Layer 1, is “Please Do Not Throw Sausage Pizza Away.” The TCP/IP model is a more concise framework, with only 4 layers: Network Access (or Link) Internet Transport (or Host-to-Host) Application (or Process) Also read : network levels

Every vendor today is spewing about the importance of managing the user experience. What this actually means, however, remains a mystery to most, and there are precious few approaches available to help you get a handle on the issue. Good and predictable user experience is no longer negotiable in this age of constant online business communications. Computer networks have effectively become the single most important tool driving corporate productivity. But user experience is one of the most difficult problems to address, especially on enterprise access networks, because each experience is influenced by a long list of moving parts, many of which are increasingly outside the control of IT. For network professionals, five main reasons drive why today’s user experience sucks and why it has become so hard for IT staff to tame: Too much data to analyze and correlate across the stack. Too many disparate management and monitoring tools. More mobile users armed with smart devices acce

oftware defined wide area networks (SD-WAN) is a new approach to multisite network connectivity that lowers operational costs and improves resource usage. Currently all the rage in IT, large corporations are buying up established players to integrate as part of their core offerings at an alarming rate. Often buzz words and IT concepts aren’t well explained, but instead assumed understood. Therefore, I’d like to step back in order to explain and explore SD-WAN. Before we get bogged down with terms like QoS, MPLS and packet-based routing, let’s first review some general networking concepts and terms to build off of : A local area network (LAN) is a private collection of devices in a small geographic location (i.e. your office building or home) connected together in a network in order to share resources. A wide area network (WAN) works much the same way, but for devices geographically diverse. In order to ensure private and consistent communication between WAN locations, a leased,

Like any other element of your technical infrastructure, your backup solution needs to be periodically reviewed and revised to meet your current challenges. Modern Backup Challenges Making copies of data is one of those conceptually straightforward tasks that’s difficult to implement in practice because of numerous requirements they need to satisfy. Today, backup needs to meet these challenges: Backups need to be fast. There’s little downtime in today’s business. That means there’s little time available to even generate the backups. There’s so much data to back up. Data collection grows exponentially every year, and so does the need for backup storage. Reusing old media can cause compliance concerns and increase the risk of data loss. In addition, the scale of the data makes it hard to complete backups within the little time available. what is lanman server Backups don’t happen often enough. Traditional end-of-day backups mean that an outage causes the loss of all intra-

Network engineering is an excellent role as it gives you so many different opportunities. There is a range of qualifications you can achieve to become the best candidate for any role. You have to remember that as a network engineer you are one of the most valuable people in the business. You are as important as the computer network itself, without you they company would have no network, so you have to be on top of your game when analysing the business network and fixing any issue that may arise. The role will always be interesting as you experience new technologies and consistently work to make the network better. our job role will be considered one of the most important within a company as you will experience a vast amount of responsibility. Most businesses rely on their network engineers to support their smooth operation if there is any disruption or damage to a network you will be responsible for fixing the issue. Any issues to a business network can cause profit loss, so they wi

Cyber security or information technology security are the techniques of protecting computers, networks, programs and data from unauthorized access or attacks that are aimed for exploitation. Description: Major areas covered in cyber security are: 1) Application Security 2) Information Security 3) Disaster recovery 4) Network Security Application security encompasses measures or counter-measures that are taken during the development life-cycle to protect applications from threats that can come through flaws in the application design, development, deployment, upgrade or maintenance. Some basic techniques used for application security are: a) Input parameter validation, b) User/Role Authentication & Authorization, c) Session management, parameter manipulation & exception management, and d) Auditing and logging. Information security protects information from unauthorized access to avoid identity theft and to protect privacy. Major techniques used to cover this are: