Advertising Network Addresses

Sat, 12 Mar 2016 | Routing Protocols

Each of the hosts in the Internet needed to be uniquely identifiable. In the Internet's two-level hierarchy, this required an address with two parts Together, these two types of addresses could uniquely identify any and all machines connected via the Internet. It is possible that the needs of a small, networked community could be satisfied with just host addresses, as is the case with LANs. Network addresses, however, are necessary for end systems on different networks to communicate with each...

The Seven Layers

Sat, 05 Mar 2016 | Routing Protocols

The OSI model categorizes the various processes needed in a communications session into seven distinct functional layers. The layers are organized based on the natural sequence of events that occur during a communications session. Figure 1-1 illustrates the OSI reference model. Layers 1-3 provide network access, and Layers 4-7 are dedicated to the logistics of supporting end-to-end communications. Figure 1-1 The OSI reference model. Figure 1-1 The OSI reference model. The bottom layer, or Layer...

IP Routing Fundamentals

Thu, 11 Feb 2016 | Routing Protocols

An Introduction to Internetworking Understanding Internetwork Addresses Internet Protocols Versions The Mechanics of Routing Protocols Internetworking with Dissimilar Protocols HOME CONTENTS PREVI& US NEXT GLOSSARY FEEDBACK SEARCH HELP Copyright 1989-1999 Cisco Systems Inc. Welcome to the employee only Cisco Press web site. The above Welcome page link presents a FAQ sheet for Cisco Press, including information about how you can buy Cisco Press books . New information on the Cisco Press...

The Media Access Domain

Thu, 28 Jan 2016 | Routing Protocols

A media access domain consists of all the devices connected to a LAN that must share the LAN's bandwidth. The name and nature of this domain depends on the media access methodology employed in a LAN. The two primary methodologies for regulating media access are contention and token passing. Other media access arbitration techniques exist, but these two account for the vast majority of existing LANs. More importantly, they will adequately demonstrate the differences between a media access domain...

Pv4 Addressing Scheme

Mon, 04 Jan 2016 | Routing Protocols

IPv4 uses a 32-bit binary addressing scheme to identify networks, network devices, and network-connected machines. These addresses, known as IP addresses, are strictly regulated by the Internet Assigned Numbers Authority (IANA) to ensure their uniqueness in the Internet. This function is currently being transitioned out of the hands of the U.S. government in favor of a private organization. This reflects both the desire of the U.S. government to control its expenses, and the undeniably global...