Fish tape is a somewhat rigid wire, typically made of spring steel or fiberglass, which has been coiled in a convenient case. The exposed end of the wire has a loop that we can secure to an end of network cable. When one organization has multiple distribution frames, the cables between them are collectively called the backbone, and are typically as high bandwidth and low latency as can be afforded. When running network cable, we are at the mercy of the environment through which our cable needs to traverse. The cable length, composition, and cladding are all dictated by the locations in which we need to install it.
All cable runs should be documented on the physical network topology diagram. Create your own worlds You can also use Packet Tracer to create your own experiments and networking scenarios. We hope that, over time, you consider using Packet Tracer – not only for experiencing the activities included in the course, but also to become an author, explorer, and experimenter. The online course materials have embedded Packet Tracer activities that will launch on computers running Windows® operating systems, if Packet Tracer is installed.
ITU-T recommendation for international telecommunication numbering, especially in ISDN, BISDN, and SMDS. An evolution of station telephone numbers. A system of addressing in which the computer selects it s own address without the user’s intervention. EIA/TIA 232 circuit that is activated to let the DCE know when the DTE is ready to send and receive data.
Instead, they are more similar to shielded twisted pair. UTP cabling may be used with any one of several IEEE Physical layer networking standards that specify throughput maximums of 10, 100, 1000, and even 10,000 Mbps. These standards are described in detail in Chapter 5. Twisted pair cable consists of color-coded pairs of insulated copper wires, each with a diameter of 0.4 to 0.8 mm .
Authentication protocol, developed by the DDN community, that provides remote access authentication and related services, such as event logging. User passwords are administered in a central database rather than in individual routers, providing an easilyscalable network security solution. Technique in which information from multiple logical channels can be transmitted across a single physical channel. Also referred to as statistical time-division multiplexing or stat mux.
Communication system where multiple channels of programming material are transmitted to homes using broadband coaxial cable. Formerly called Community Antenna Television. A commonly-used measure of the rate of data transmission that specifies sport and health mclean the number of bits that are transmitted in one second. May be prefixed with multipliers such as K, M, and G which indicate rates of thousands, millions and billions of bits per second. Backward explicit congestion notification.
Initial routing algorithm used in APPN. ISR provides node-to-node connection-oriented routing. Network outages cause sessions to fail because ISR cannot provide nondisruptive rerouting around a failure. Asynchronous transmission over a synchronous data link. Isochronous signals require a constant bit rate for reliable transport.
Physical and remote access to this equipment should be limited to authorized personnel only. Network personnel can also implement port security and other measures on switches, as well as various wireless security measures on APs. Securing the telecommunications room has become even more important because of the increasing occurrence of identity theft. New privacy legislation results in severe penalties if confidential data from a network falls into the wrong hands. Modern networking devices offer capabilities to help prevent these attacks and protect data and user integrity.
An electrical supply system that conditions electrical power for a computer system and will allow continued operating in the event of a power failure. Any of the functions carried out by protocols in the Network or Transport Layers. Any device, software program or instrument constructed for the purpose of aiding a human in accomplishing a goal.
This refers to the total number of devices being used in the trusted segment of the network. When shopping for hardware firewalls, there are nearly unlimited available options. There isn’t really a clear delineation between consumer and enterprise routers. Dozens of shades of grey exist between a cable/DSL router on the shelf of retail computer stores and those custom ordered from large vendors such as Cisco, Juniper, Foundry, and others.