what is n+ certification

 Public network: a public network is defined as a network that can be used by anyone and not as networks that are configured with a personal password. It is a network of interconnected computers, capable of sharing information and allowing users to communicate regardless of their geographical location.

Private network: a private network would be defined as a network that can be used only by some people and that is configured with a personal password.

Personal Area Network (PAN) : (Personal Area Network) is a computer network used for communication between computer devices (phones including personal digital assistants) near a person. The devices may or may not belong to the person in question. The range of a PAN is typically a few meters. PANs can be used for communication between their personal devices (intrapersonal communication), or to connect to a high-level network and the Internet (an up link). Personal area networks can be wired to computer buses such as USB and FireWire. A wireless personal area network (WPAN) can also be made possible with network technologies such asIrDA and Bluetooth .

Local Area Network (LAN) : a network that is limited to a relatively small special area such as a room, a single building, a ship, or an airplane. Local area networks are sometimes called a single location network. Note: For administrative purposes, large LANs are generally divided into smaller logical segments called workgroups . A Workgroups is a group of computers that share a common set of resources within a LAN.

Virtual local area network (VLAN) : A Virtual LAN or commonly known as VLAN , is a group of computers, with a common set of resources to share and requirements, that communicate as if they were attached to a logical division of networks of computers in which all nodes can reach each other by means of Broadcast in the data link layer, despite their different physical location. With this, computers can be logically grouped so that the location of the network is no longer so associated and restricted to the physical location of each computer, as is the case with a LAN, also providing security, flexibility and resource savings. To achieve this, the IEEE 802.1Q specification has been established as a standard designed to address the problem of how to separate physically very long networks into small parts, as well as provide a high level of security between internal network segments while having the freedom to manage them regardless of their physical location

Campus Area Network (CAN) : It is derived to a network that connects two or more LANs which must be connected in a specific geographic area such as a University Campus , an Industrial Complex or a Military Base what is n+ certification.

Metropolitan Area Network (MAN) : A network that connects two or more local area networks together but does not extend beyond the immediate city limits, or the Metropolitan Area . Routers ( routers ) multiple switches ( Switch ) and the hubs are connected to create a MAN.

Wide Area Network (WAN) : It is a data communications network that covers a relatively wide geographical area and often uses the transmission facilities provided by common carriers, such as telephone companies. The WAN Technologies generally operate in the lower three layers of the OSI reference model : the physical layer , the data link layer and the network layer .

Storage area network (SAN) : A network designed to connect servers, arrays (arrays) disc and supporting libraries. Mainly, it is based on fiber or iSCSI technology. Its function is to quickly, safely and reliably connect the various storage elements that make it up.

Irregular network : It is a system of cables and buses that are connected through a Modem , and that results in the connection of one or more computers. This network is similar to the mixed one, only it does not follow the parameters presented in it. Many of these cases are widely used in most networks.