Interview Questions - Networking

The header should have a minimum length of 20 bytes and can have a maximum length of 60 bytes.

Class A   -       0.0.0.0   -   127.255.255.255
Class B   -   128.0.0.0   -   191.255.255.255
Class C   -   192.0.0.0   -   223.255.255.255
Class D   -   224.0.0.0   -   239.255.255.255
Class E   -   240.0.0.0   -   255.255.255.255

The Trivial File Transfer Protocol (TFTP) allows a local host to obtain files from a remote host but does not provide reliability or security. It uses the fundamental packet delivery services offered by UDP.

The File Transfer Protocol (FTP) is the standard mechanism provided by TCP / IP for copying a file from one host to another. It uses the services offer by TCP and so is reliable and secure. It establishes two connections (virtual circuits) between the hosts, one for data transfer and another for control information.

1. Server-based network: provide centralized control of network resources and rely on server computers to provide security and network administration
2. Peer-to-peer network: computers can act as both servers sharing resources and as clients using the resources.