Monday, October 11, 2010
OSI Model Physical Layer
The physical layer defines the electrical, mechanical, procedural, and functional specifications for activating, maintaining, and deactivating the physical link between communicating network systems. Physical layer specifications define characteristics such as voltage levels, timing of voltage changes, physical data rates, maximum transmission distances, and physical connectors. Physical layer implementations can be categorized as either LAN or WAN specifications. Figure 1-7 illustrates some common LAN and WAN physical layer implementations.
Figure 1-7 Physical Layer Implementations Can Be LAN or WAN Specifications
Home
Subscribe to:
Post Comments (Atom)
Entri Populer
-
Multiplexing is a process in which multiple data channels are combined into a single data or physical channel at the source. Multiplexing ca... -
The data and control information that is transmitted through internetworks takes a variety of forms. The terms used to refer to these inform... -
Chapter Goals Internetworking Basics What Is an Internetwork? History of Internetworking Internetworking Challenges Open System Inter...
0 comments:
Post a Comment