IT 120 Spring 2017 Homework 2 Due on Friday March 3 2017 at

IT 120

Spring 2017, Homework 2

Due on Friday, March 3, 2017 at 1:05 pm in class (Late assignment will not be accepted).

How many links are required for a full-mesh topology with 6 devices? (10 pts)

Your office currently uses CAT 6 unshielded twisted pair (UTP) in its local area network. Your boss wants you to evaluate switching the local area network to fiber. (10 pts)

List two advantages of sticking with UTP.

List two advantages of switching to fiber.

What is your recommendation? Why?

A type of cabling passes signals from 20 MHz to 300 MHz. What is the bandwidth of this cabling? (10 pts)

A structured cabling installation connects a computer in a work area to a switch in the telecommunications room. Put the components of the installation in order, starting from the switch and ending at the computer. 1 is closest to the switch and 5 is closest to the host (10 pts)

_______              horizontal cabling

_______               patch cable in the telecommunications room

_______               patch cable in the work area

_______              patch panel

________             wall outlet

Assume you provide the tech support for your office, which uses a wired Ethernet. One user reports that his computer is working but he cannot access anything using the network. All other users have no problems. (10 pts)

Do you suspect that the problem is in one computer or a shared resource? Why?

List two possible failures that may cause this problem.

Complete the switch table below. (10 pts)

A switch and a NIC are negotiating a connection. The switch operates at 10Mbps, 100 Mbps, and 1000 Mbps. The switch supports both half-duplex and full-duplex connections. The NIC operates at 100 Mbps and 1000 Mbps. The NIC supports half-duplex connections. After the negotiation, what speed will the link operate at? Will it be full-duplex or half-duplex? (10 pts)

The standard wired Ethernet uses CSMA/CD but WiFi uses CSMA/CA. Why the difference? (10 pts)

Contrast the following methods of WiFi Security: MAC address filtering, wireless authentication, and data encryption. (10 pts)

Identify the medium used by each type of connection or protocol. The choices are unshielded twisted pair, coaxial cabling, fiber optics, and radio waves. (10 pts)

802.11 WiFi                                              ______________

Cable modem                                            ______________

OC-1 connection                                       _______________

DSL                                                           ______________

FIOS                                                          _______________

Modern Ethernet (two answers)               _______________ or

_______________

Solution

How many links are required for a full-mesh topology with 6 devices?
Ans: It requires n(n-1)/2 cable links. So 6(6-1)/2 = 30/2 = 15

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UTP advantages are cheap and WIMAX, it can give high speed data transfer with low cost.
Switching to fiber advantage is high speed data transfer, no loss of data while transmitting data over long distances.
My recommendation will be fibre optics, since no loss of data.

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As it passes signals from 20Mhz to 300Mhz ,So the bandwidth will be 20Mhz to 300Mhz

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It is a direct question.. here is the answer
__ 3 _____ horizontal cabling
__ 1 _____ patch cable in the telecommunications room
__ 5 _____ patch cable in the work area
__ 2 _____ patch panel
__ 4 _____ wall outlet