If you had to download a 20-page paper of 400 k (bytes) from your professor, approximately how long
would it take to transfer it over the following circuits? Assume that control characters add an extra 10%
to the message.
a. Dial-up modem at 33.6 kbps
400kb (8)= 3200
10% of 400kb= 40kb (8) = 320kb
320kb + 3200kb = 3520 kb
3520kb/33.6 = 104.76 seconds
b. Cable modem at 384 kbps
Message size = 3520kb
3520/384= 9.16 seconds
c. Cable modem at 1.5 Mbps
1.5 Mbps (1000 kbps) = 1500 kbps
3520/ 1500 = 2.346 seconds
What media would you suggest the company install in its office and why?
When it comes to wiring short links and distance, twisted pair and coaxial cables should be used. These
cables can have data rates ranging from 1 Mbps to 1 Gbps. Twisted pair and coaxial cables are less
expensive than fiber-optic cables. Since it is a smaller business, not much range is needed. Therefore,
twisted-pair coaxial cables are more logical and cost effective to use. Although they cost less, twisted
pair cable and coaxial cables are more susceptible to interference and error rates. Based on the size of
the location and what they do, twisted pair and coaxial cables are better to use.