| Layer 2 vs Layer 3 | Layer 2 and Layer 3 differ mainly in the routing function. A Layer 2 switch works with MAC addresses only and does not care about IP addresses or any items of higher layers. Layer 3 switch, or multilayer switch, can do all the job of a layer 2 switch and additional static and dynamic routing. That means, a Layer 3 switch has both a MAC address table and an IP routing table and handles intra-VLAN communication and packet routing between different VLANs. |
| Hypervisor Type 1 | Native or bare-metal hypervisors
These hypervisors run directly on the host's hardware to control the hardware and to manage guest operating systems. For this reason, they are sometimes called bare-metal hypervisors. |
| Hypervisor Type 2 | These hypervisors run on a conventional operating system (OS) just as other computer programs do. A virtual machine monitor runs as a process on the host. Type-2 hypervisors abstract guest operating systems from the host operating system. |
| Hypervisor | a software that you can use to run multiple virtual machines on a single physical machine |
| Hypervisor Image | Hypervisor Image |
| Hyper-V Host | the physical computer that provides the resources, including processing power, memory and disc usage for your virtual machines |
| VMware | a computer software program that allows you to install a virtual operating system within any operating system |
| Virtual Server | a software-based representation of a physical server. The function that abstracts CPU, memory, storage and network resources from the underlying hardware and assigns them to VMs is called a hypervisor |
| Backup Software | a computer program that makes a copy of your files and folders or your complete system, including the operating system, applications and data. Advanced applications allow you to make multiple backups so that if one backup is damaged or unavailable, you have another with which to recover your data and/or systems. |
| SAN | A Storage Area Network (SAN) is a specialized, high-speed network that provides block-level network access to storage |
| Difference between SAN and Cloud storage | The difference between storage area networks and cloud storage is that SAN systems are hosted through a company's own servers, while the cloud stores it virtually via internet servers |
| SAN Image | SAN Image |
| NAS | Network-attached storage (NAS) devices store and share data for multiple computers, that can be accessed remotely. |
| DAS | Direct-attached storage (DAS) is a type of storage that is attached directly to a computer without going through a network. |
| SAN vs NAS vs DAS image | SAN vs NAS vs DAS image |
| NAS vs SAN image | NAS vs SAN image |
| NAS vs SAN setup image | NAS vs SAN setup image |
| What is a Tape Library | a collection of magnetic tape cartridges and tape drives |
| What does a Tape Library do? | Tape libraries and autoloaders automate backups and archives with multiple tapes. Tape libraries offer more capabilities than autoloaders, but are often far more expensive, as well as more complex because they have more tape drives. A tape autoloader is a step up from a single tape drive for backup and archiving. |
| Switch | A network switch forwards data packets between devices. Switches send packets directly to devices, rather than sending them to networks like a router does. |
| Layer-3 Switches/Routers | A Layer 3 switch functions as both a switch and a router. |
| VLAN | Virtual Local Network (VLAN) is a subnetwork that takes groups of devices on a larger network and creates a virtual LAN for those devices, effectively separating them from the other devices on the network. This achieves the same ends as WLANs are able to achieve naturally through the use of separate channels and lends a LAN much more flexibility. |
| WLAN | A wireless local area network can be considered a subcategory of regular local area networks. By definition, in order to be within range of a wireless access point, a device must be local to that access point. Wireless networks differ, though, in that they use the air as a shared hub through which they transmit data as opposed to discrete cabling. We know this, of course, as WiFi. |
| LAN | A Local Area Network (LAN) is a network of devices connected across short distances, all located within a single, defined area. For example, this could be the network within a household or a business, or even cover an area as diverse as a college campus. |
| WAN | Wide Area Network (WAN) connects multiple smaller networks over larger distances. This opens up a vast range of new opportunities for computers to share data and information. |
| VPN | Virtual Private Network (VPN) offers a unique combination of privacy and remote access. When you use a VPN, you can send and receive data as if you were a part of a private network, even though you are doing so from a different location. |
| 2 VPN Principals | First, for businesses that need to provide secure access to their private network to staff working remotely.
Second, users can effectively create a virtual network, ‘become’ a part of it and appear to the wider internet as part of that virtual network. This creates a method of masking your identity and true IP address/location when you’re interacting with public networks. This offers tremendous value in terms of privacy and internet security. |
| MAN | Metropolitan Area Network connects different organizations |
| LAN vs MAN vs WAN image | LAN vs MAN vs WAN image |
| Layer 2 switch | a traditional network switch port that operates in the network data link layer or the "layer 2" of the OSI model of network connection. Purely operating within the network's hardware layer, these switches forward data packets based on the MAC addresses specified. |
| Layer 2 vs Layer 3 | Layer 2 and Layer 3 differ mainly in the routing function. A Layer 2 switch works with MAC addresses only and does not care about IP addresses or any items of higher layers. Layer 3 switch, or multilayer switch, can do all the job of a layer 2 switch and additional static and dynamic routing. That means, a Layer 3 switch has both a MAC address table and an IP routing table and handles intra-VLAN communication and packet routing between different VLANs. |
| Access Points | a device that creates a wireless local area network, or WLAN, usually in an office or large building. An access point connects to a wired router, switch, or hub via an Ethernet cable, and projects a Wi-Fi signal to a designated area. |
| Load Balancers | acts as the “traffic cop” sitting in front of your servers and routing client requests across all servers capable of fulfilling those requests in a manner that maximizes speed and capacity utilization and ensures that no one server is overworked, which could degrade performance. |
| Point to Point connections | a private data connection securely connecting two or more locations for private data services. A point to point connection is a closed network data transport service which does not traverse the public Internet and is inherently secure with no data encryption needed. |
| UPS | uninterruptible power supply, is equipped with battery backups that kick in during a power failure, keeping your network equipment running smoothly. This protects your equipment from damage and ensures you don't lose any unsaved work. |
