Case Chapter 3

1. In this case the XYZ Corp’s, Nashua, NH, facilities are two office buildings located 400 ft apart with it’s own LAN, to connect the two networks. I would choose to use fiber – optic cable which is to use thinwire Ethernet. The reason is that, to justify the use of fiber – optic cable that increased bandwidth .

Answer. D

2. TVBCA is moving to new facilities. Its new campus includes 3 buildings with no more than 100 meters apart from each other. The network is to link the 3 buildings. The proposed solution is to use a fiber – optic cable to network the 3 buildings. The possible result does this solution delivers are the required result and only one of the two desired result because, a fiber – optic can support speeds of up to 100 mbps and secure as possible from electronic eavesdropping, and since this type of cable cost is expensive, TVBCA must have sufficient cost of the network.
Answer. B

3.In this case, the proposed solution of using category 5 UTP and hubs to connect all workstations, therefore is the common in most office building and other work environments, the same with the advertising firm. Since, the company plans to introduce video teleconferencing and e – mail capable and database application, the advertising firm must operate the network at speeds up to 100 mbps and since UTP helps to ensure consistent performance that adhere to its requirements. The proposed solution delivers the required results and both of the optional desired result because it needs to have a speed of 100 mbps to support the bandwidth of the network to have a fast access as possible and its easy to install with high interference and it cost inexpensive.
Answer. A

4. In the case of XYZ Corp. that decides to bring mobile computing to their field engineers. And each field engineers is to be supplied with a laptop, a portable fax or printer and some kind of wireless devices. Since laptops and other handheld computers are now affordable and they want to have it from GTE Corporation, they can apply mobile computing which is capable of using broadcast and communication carries to send and receive signals using portable devices, and the standards start to come online which enable the field engineers to send e – mail and receive it from their employees and headquarters, So, the proposed solution delivers the required result and only one of the two desired results because it doesn’t emit no external signals that might be detected by any broadcast medium does.

Answer. B

5. In this case, wireless options do look very attractive in TVBCA who operates two building on other side of the river that crosses nearby, is a local cable company that acquire the right – of – way and to install a line between them. If we are going to install a set of 10 mbps point – to – point infrared laser wireless bridges for communication between the two buildings, therefore the proposed solution delivers the required result but neither of the optional desired results because both buildings must have communication with 10 mbps point – to – point infrared laser wireless bridge enables to connect network up to 3 miles apart and the wireless connection must be secure from electronic eavesdropping, because a local cable company is next door to the 15 – story building, it must not be resistant to attenuation of electromagnetic interference caused by emissions from external devices such as transformers or electrical motors that can disrupt the network transmission over an infrared .
Answer. C