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

_______________