Transmission Media
By Christopher Boehm
Overview
• Different types of transmission media
• Pros and Cons
• Security Issues
Coaxial Cable
• Used with Cable
Television
• More expensive
than phone wiring
• Less prone to
interference than
phone
More about Coaxial cable
• Can carry large
amounts of data
• *Security Issue –
Can be spliced easily
• *Solution??
Twisted Pair Copper Cable
• Found in most buildings in the US
• Inexpensive alternative to Coaxial
• Supports a much shorter distance
• Shielded and Un-Shielded
More on Twisted Pair Copper
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Inexpensive and widely used
Easy to implement, add nodes
*Security Issue – Easily spliced
*Solution??
Fiber Optic Cable
• Newest form of cable
• Made of glass core and plastic covering
• Carries light rather than electric current
• Nearly impossible to splice
Pros and Cons of Fiber Optics?
• +Very high bandwidth
• +Immune to EMI
• +Long distances
• +Small size
• +High security
• - Fragile
• - Difficult to implement
• - EXPENSIVE!
Wireless Transmission
• Transmit over the air
• Use microwave, radio, and infared
• Typical wireless connections use radio waves
Wireless Pros and Cons
• +Extremely easy to implement
• +Reasonably low cost
• - VERY difficult to secure
Questions? Comments?