1. Transmission Media
By Christopher Boehm

2. Overview Different types of transmission media Pros and Cons
Security Issues

3. Coaxial Cable Used with Cable Television
More expensive than phone wiring
Less prone to interference than phone

4. More about Coaxial cable
Can carry large amounts of data
*Security Issue – Can be spliced easily
*Solution??

5. Twisted Pair Copper Cable
Found in most buildings in the US
Inexpensive alternative to Coaxial
Supports a much shorter distance
Shielded and Un-Shielded

6. More on Twisted Pair Copper
Inexpensive and widely used
Easy to implement, add nodes
*Security Issue – Easily spliced
*Solution??

7. Fiber Optic Cable Newest form of cable
Made of glass core and plastic covering
Carries light rather than electric current
Nearly impossible to splice

8. Pros and Cons of Fiber Optics?
+Very high bandwidth
+Immune to EMI
+Long distances
+Small size
+High security
- Fragile
- Difficult to implement
- EXPENSIVE!

9. Wireless Transmission
Transmit over the air
Use microwave, radio, and infared
Typical wireless connections use radio waves

10. Wireless Pros and Cons +Extremely easy to implement
+Reasonably low cost
- VERY difficult to secure

11. Questions? Comments?