Mccabe3E Solutions Manual

Chapter 1 Exercises: 1. In example 1.1, an analogy was drawn between a network’s architecture and design and a home’s architecture and design. Provide a similar analogy, using a computer’s architecture and design. A. While the network\home can be thought of as an overall entity that is comprised of discrete elements that function as a whole, an analogy using the architecture of a computer is also appropriate. The frame of the house and the various mechanical components can be viewed as the overall computer “system” (disks, memory, power, display). The computer is comprised of an overall system architecture based on the designers’ needs and design constraints – much like the network. Specific comparisons are that the signal and data busses comprise the physical network with the Operating System analogous to the router and route-policy systems in the network. As the network is equipped with ports in locations necessary for user and device access, the computer is equipped with interfaces and interface devices that enhance the ability of users to interact with the computer – mouse, keyboard, monitor, etc. 2. Given the existing configuration a total link-weight of 22 between Network A (Joe) and Network B (Sandy) is currently in place. Given the option of adding an additional link with a weighting of 15 to the architecture – the link could be added between Network C and Network B to arrive at a total link weighting of 20, or the link could be directly implemented between Networks A and B. The exact location for improving the interconnectedness between the networks should be determined by studying the communication flow between Networks A and B as well as Network C and B. 3. A CDN is a WAN service that is specifically optimized for the distribution of either static or streaming content to Internet users. There are two functions that differentiate a CDN from most traditional public IP-based networks – namely the function to look at the source of a connection request and