interconnectivity between different branches and different computer networks within the DOD.
TCP/IP was developed, in part, so that dissimilar systems in the military could communicate
with each other. With technologies arising and then becoming obsolete in a few years, it is
amazing that the original design concept of TCP/IP as a supernetwork has scaled well and
continues to thrive with the explosion of the Internet.
services. The global acceptance of IP is demonstrated in its ability to be deployed over all
versions of data-link layer protocols. Now that the public Internet is used on a global scale,
TCP/IP is the significant protocol in every major computer operating system. Machines at
home, at work, or at play can connect to any other network using TCP/IP as a common medium.
Thanks to TCP/IP, anyone can make their personal computer a host on the Internet. The casual
browser can find, retrieve, view, and share information gathered from around the world.
layer of the OSI model, is responsible for moving packets of data from node to node. TCP,
which operates at the transport layer of the OSI model, is responsible for verifying the correct
delivery of data from client to server. Data can be lost in the intermediate network. TCP
detects errors or lost data and retriggers retransmission until the data is correctly and
completely received.
design decisions a CCDP will make is the assignment of IP addresses. IP addressing represents
the foundation of internetwork packet flow. One of the strengths of TCP/IP is its addressing
scheme, which uniquely identifies every computer on the network. The public Internet address
design is based on the premise that IP addresses are globally unique. If the design allowed
duplicate IP addresses, there would be no way to ensure that a packet would know which
duplicate address was the proper destination. The Internet Assigned Numbers Authority
(IANA) assigns unique 32-bit IP addresses to organizations and companies. Globally unique
addresses permit IP networks anywhere in the world to communicate with each other.
that a choice be made with regard to which method is best for a given situation. The choices
include the following: