IT3031: Communication Systems
Midterm Exam
Date: April 24, 2008
1. Compare the difference between ‘telecommunication’ and ‘data communication.’ (5 pts)
ANS: Telecommunication contains telephony, telegraphy and television which use analog or digital
transmission. Data communication is the subset of telecommunication which use digital transmission.
2. Compare the difference between ‘analog’ and ‘digit.’ (5 pts)
ANS: analog is transmission with continues signal and digital is presented by discrete signal.
3. Illustrate the topology of mesh, star, bus, and ring. Compare the merits and demerits of them. (10
pts)
ANS:
(1) mesh:
advantage: use of dedicated links, robust, privacy or security, point-to-point makes fault isolation
easy.
disadvantage: related to the amount of cabling and the number of I/O ports, installation and recon-
nection are difficult, sheer bulk of the wiring can be greater than the available space can accommodate.
This preview has intentionally blurred sections.
Sign up to view the full version.
This is the end of the preview.
Sign up
to
access the rest of the document.
- English-language films, pts, digital transmission
-
Click to edit the document details
