LAN is short for Local Area Network. It refers to the connection between computers and other network devices that are located within a small physical location.
What is the equivalent layer or layers of the TCP/IP Application layer in terms of OSI reference model?
The TCP/IP Application layer actually has three counterparts on the OSI model: the Session layer, Presentation Layer and Application Layer.
DHCP is short for Dynamic Host Configuration Protocol. Its main task is to automatically assign an IP address to devices across the network. It first checks for the next available address not yet taken by any device, then assigns this to a network device.
There are three main network protocols supported: NetBEUI, TCP/IP, and IPX.