Chapter Questions
What do the abbreviations ASCII and EBCDIC stand for?
Provide the ASCII code for $5, \mathrm{a}, \mathrm{A}$, and $\mathrm{STX}$.
Provide the EBCDIC code for $5, \mathrm{a}, \mathrm{A}$, and STX.
Describe the Gray code.
Provide an application of the Gray code.
Describe the origin of the RS-232 C standard and discuss its current status as a standard.
What are the universal serial bus (USB) wire functions and colors?
The USB Type A connector is used for upstream or downstream connection?
What is handshaking?
What data rates do USB and FireWire support?
Describe the difference in USB Type A and B connectors.
Provide a general description of a LAN.
List the basic topologies available for LANs and explain them.
Describe the operation of the Ethernet protocol.
Describe the Ethernet frame structure, including a description of media access control (MAC) level addressing.
Define the concept of a broadcast address in an Ethernet frame.
Discuss the layout, interconnection of the devices, and issues in implementing an office LAN.
Discuss the layout, interconnection of the devices, and issues in implementing a building LAN.
List the common numerics used for LAN cabling.
Describe the differences among local-area networks (LANs), metropolitan area networks (MANs), and wide-area networks (WANs).
Provide a brief description of the functions addressed by the OSI reference model.
Explain the functions of bridges and routers.
Describe the evolution of the internet.
Describe the concept of IP addressing.
Find four internet sites that provide technical tutorials on cellular communications.
Discuss the operation of IP telephony.
Discuss the issue of quality of service $(\mathrm{QoS})$.
Describe the operation of ADSL (asymmetric digital subscriber line).
Discuss the implementation of cable modems for interfacing the networks.
Describe how V,92 can achieve such high data rates over the analog phone lines.
Explain the objective of ISDN and briefly explain its organization with the help of Figures 11-26 and 11-27.
List five xDSL services and indicate their projected data rates.
Describe the use of DMT (discrete multitone) operation in ADSL systems.
You are at a company where phone lines are being used for signal transmission without delay equalization. Predict the results of unequal delays to the different frequency components of a received signal and justify the need for delay equalization.
You hear someone refer to the "handshaking protocol." Is this an accurate use of terms? Why or why not?
Discuss the issues of connecting a building network (LAN) to a T1 connection that has been brought into the building. What information do you need to know to complete the job?