network processor Essay

612 Words Jan 25th, 2015 3 Pages
What are the advantages and disadvantages of network processors, such as hubs, switches, routers, and gateways?
Well the advantages of hubs are they allow nodes to connect to one another that will create a physically attached network and a less expensive than other network devices while being easy to setup. But being an easy-to-use device that broadcast to all ports can be really unsecured for many applications. Lastly the bandwidth is shared by all the PC’s connected to the hub which slows down the connection between all machines attached to it and can form bottlenecks. Next we have, switches that have many advantages. The greatest would be the ability to support multiple VLAN’s. Compared to a hub it is a smarter device and still easy
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The following summarizes the features of STP cable:
• Speed and throughput—10 to 100 Mbps
• Average cost per node—Moderately expensive
• Media and connector size—Medium to large
• Maximum cable length—100 m (short) cable consists of a hollow outer cylindrical conductor that surrounds a single inner wire made of two conducting elements.
The following summarizes the features of coaxial cables:
• Speed and throughput—10 to 100 Mbps
• Average cost per node—Inexpensive
• Media and connector size—Medium
• Maximum cable length—500 m (medium)

Fiber-optic cable used for networking consists of two fibers encased in separate sheaths.
The following summarizes the features of fiber-optic cables:
• Speed and throughput—More than 1 Gbps
• Average cost per node—Expensive
• Media and connector size—Small
• Maximum cable length—More than 10 km for single mode; up to 2 km for multimode

Wireless Networks use radio frequencies (RF) or infrared (IR) waves to transmit data between devices on a LAN.
•Wireless frequencies range from 3 kilohertz (kHz) to 300 gigahertz (GHz).
•The data-transmission rates range from 9 kilobits per second (kbps) to as high as 54 Mbps.
• Media and connector size—Small
• Maximum Transmission distance dependent on signal strength and antenna design. On average 30 ft. to 5 miles on average

What is their performance in terms of reliability, speed capabilities, and nominal distance for reliable spans?
All are reliable
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