This section starts off by taking a look at the Department of Defense’s version of TCP/IP, and then compares it and its protocols with the OSI Reference Model. This section reviews the functions of TCP/IP at the Network layer Read the full story

The Data Link and Network layers of the OSI model are responsible for addressing local and network data. One layer uses logical addresses; the other layer uses physical addresses. Read the full story

Know the differences in how UDP sequences packets.
You need to remember that UDP does not sequence packets and is connection-oriented. Read the full story