Part 1

R1 What is the difference between a host and an end system? List the types of end systems? Is a Web server an end system? A host and an end system are terms that are used interchangeably meaning that a host is an end system. The types of application programs that run are web browser programs, web server programs, and e-mail readers and senders. So Yes a web server is an end system.

R4 List six access technologies. Classify each one as residential access, company access or mobile access Cable Modems -> Residential Access Digital subscriber Line -> Residential Access Hybrid fiber-coaxial cable -> Residential Access Ethernet Technologies -> Company Access Wireless LAN -> Wireless Access Bluetooth -> Wireless Access

R5 Is HFC transmission rate dedicated or shared among users? Are collisions possible in a downstream HFC channel? Why or Why not? HFC transmission is in fact shared among users, it has protocols that are created to limit if not reduce the possibility of collisions.

R8 What are some physical media that Ethernet can run over? Ethernet can use twister pair and coaxial.

R9 Dial-up modems, HFC, and DSL are all used for residential access. For each of theses technologies provide a range of transmission rates and comment on whether the transmission rate is shared or dedicated. Dial-up is a dedicated transmission that servers 56.6kbps and under. HFC is a shared transmission and the rate really is dependent on the users on the line. On the other end DSL which is a dedicated transmission has a range of 768 kbps to 1.5 mbps downstream and 128kbps to 768 kbps upstream.

R11 What advantage does a circuit-switched network have over a packet-switched network? What advantages does TDM have over FDM in a circuit-switched network?

Circuit-switched networks have a