VPN (Virtual Private Network) allows for users to access private networks and share data from a public network securely. VPN's can be used for a number of reasons including: accessing data that is geographically restricted, or accessing websites that are censored in your area and accessing data securely without anybody watching.
Routers and switches are hardware devices that are essential to the running of networks.
The DHCP is responsible for assigning IP addresses to hosts on the network. DHCP is imperative to the running of the network, if DHCP was not used then IP world be allocated manually, this would lead to conflict occurring as two hosts would have the same IP addresses.
I am going to be starting a series of blogs explaining the fundamentals of networks, today I explain ARP (Address Resolution Protocol).