Ism 324 Assignment 2 Essay

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Assignment #2 ISM 324
ISM324 - Homework 2(Due on Feb 14th, 2017)
Answer the following questions. All citations must be appropriately documented.

1. Discuss the difference between twisted pair cables and fiber optics cables (6points)

Based off what I’ve learned from lecture twisted pair and fiber optics cables are very different. Both are physical layer cabling apart of the layer 1 of the OSI model. Fiber optics transfer can data using light unlike twisted pair cables which use electricity. In terms of distance, a fiber optics can carry a signal up to thousands of miles; twisted pair cables have a limit of 100 meters.

Fiber: Core, Cladding, Protective Jacket

Twisted Cabling: STP or UTP
Cord, Protective Shielding, Terminals
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It holds many systems and devices.
Horizontal Cabling
These extend from the TC and travel horizontally along walls, ceilings, or floors to the LAN work area.
Work Area
Where all your electronics looking to connect to the LAN are located i.e computers, printers, patch cables, computer adapter cables, and fiber jumpers.

3. What is an ad hoc network? (4 points)

A decentralized network that doesn’t rely on a pre existing infrastructure.

4. Please explain frequency division multiple access (FDMA), and time division multiple access (TDMA) multiple access methods. (8 points)

FDMA & TDMA are both methods of sending data to prevent interference/collision.
With FDMA the data messages are sent on different frequencies (840 - 860 MHz).
With TDMA the data messages are sent at different times to prevent interference.

5. Describe the frequency spectrum for the DSSS channels in 802.11b wireless networking (6 points).

The frequency for DSSS channels in 802.11b is the 2.4 GHz frequency range. It is largely shared by many technologies (Bluetooth, cell phones, wireless LANS, etc).
Because it is shared with many technologies it is prone to RF interference of

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