Test Questions for Chapter 18
True/False
1.TFSince its origin, the Internet has always been designed and organized for supporting business and commercial enterprises.
2.TFThe Internet and the World Wide Web are synonymous. Specifically, the same computer systems and information that resides on the Internet may also be accessed on the Web.
3.TFThe World Wide Web was pioneered by Tim Berners-Lee at CERN as a medium for exchanging scientific information.
4.TFThe Internet Society is the central ruling authority for the Internet; in addition to managing its operations, it oversees membership of all networks that participate on it.
5.TFInternet applications are typically organized as client/server software.
6.TFThe Internet2 will eventually replace its predecessor Internet.
7.TFElectronic mail represents a secure means of communication.
8.TFUsing FTP, it is possible to transfer a file from a local host to a remote computer system, but only if the two are compatible in hardware and software.
9.TFCookies are special numbers assigned by Web servers that are sometimes used to identify Web clients from earlier transactions.
10.TFThe domain name system is supported by a centralized, global database storing all domain names and IP numbers.
Matching
1.____ARPANETa.the standard for communication over the
Internet.
2.____DNSb.caches Web pages and resources for faster
delivery to Web clients.
3.____TCP/IPc.created by the National Science Foundation as a
backbone or “superhighway” for Internet traffic.
4.____datagramsd.packets.
5.____client (programs)e.software that usually resides on remote
computer systems that receives and responds to
requests for information from other systems.
6.____server (programs)f.used for remote logins.
7.____e-mailg.the experimental loosely-coupled packet-
switching network that was the forerunner of the
Internet.
8.____FTPh.software that usually resides on the local
computer system that requests for and processes
information from remote systems.
9.____telnetj.use this to download or upload files.
10.____proxy serverk.Internet application that functions as a basic
messaging system.
m.standards for Internet communication that bridge
different types of networks and hosts.
n.convert names assigned to Internet and Web
resources to IP numbers for proper addressing and
routing.
Multiple Choice
1.TCP (of TCP/IP)
a.manages the basic message service for Internet applications.
b.manages the addressing and routing of datagrams for Internet communications.
c.translates domain names to addresses used for Internet routing.
d.none of the above.
2.IP (of TCP/IP)
a.manages the basic message service for Internet applications.
b.manages the addressing and routing of datagrams for Internet communications.
c.translates domain names to addresses used for Internet routing.
d.none of the above.
3.Asynchronous transactions are those in which
a.the sender and receiver communicate by means of a connection maintained over a period of time.
b.the sender and receiver communicate without the necessity of a continuous connection.
c.the sender and receiver communicate by means of different hardware and software.
d.none of the above.
4.A chief advantage of a client/server application is that they
a.distribute processing between different systems.
b.permit server systems to handle requests from multiple clients concurrently.
c.help to bridge the differences between the hardware platforms of the communicating systems.
d.all of the above.
5.The Domain Name System servers
a.are a collection of databases identifying IP numbers with their respective domain names.
b.form a distributed system including local and global servers.
c.must be consulted when the user specifies requests involving URLs, e-mail addresses, etc.
d.all of the above.
6.Communications between the local mail server and the receiver’s user agent is handled by
a.POP (Post Office Protocol).
b.IMAP (Internet Mail Access Protocol).
c.HTTP (Hypertext Transfer Protocol).
d.any of the above.
7.As a form of communication, electronic mail
a.is faster and more efficient that conventional forms.
b.can be handled at times that are more convenient for both the sender and receiver.
c.requires some care in expression because of the problems of distance and tone.
d.all of the above.
8.While travelling, one could consult his or her personal e-mail account by using this application
a.FTP.
b.telnet.
c.chat.
d.all of the above.
9.A Web cache stores previously requested Web resources
a.temporarily on the client’s machine.
b.on proxy servers that service the client’s machine.
c.in order to reduce demand on the origin server hosting that resource.
d.all of the above.
10.Multicasting is
a.a broadcast method that delivers data to all hosts on the network.
b.a communication method that delivers data to multiple hosts without flooding the network with many copies of that message.
c.a communication method that sends a single message that is shared and passed along to other members of the network.
d.all of the above.
Fill in the Blanks
1.Besides the Web, a significant portion of the Internet’s traffic is composed of packets generated by these three basic Internet applications. ______, which is a networked messaging service; ______, which permits a local computer system to connect to a remote host; and ______, which is used to transfer files from one system to another.
2.A ______program typically resides on a local computer system and requests services or information from a remote system connected to it by a network. The ______program, in turn, receives and processes these requests.
3.On the Internet, information is typically divided into uniformly-sized units called ______which are transmitted from node to node managed by Internet ______.
4.The ______is a set of designations that serve as proxies for IP addresses used for routing on the Internet.
5.For many applications, the transport service is based on ______, which provides a connection-based or guaranteed message system. On the other hand, other applications may employ ______, offers a connectionless message service.
6.The next generation of Internet technologies will likely come from the ______project which is headed by a consortium of U.S. government agencies, educational institutions, and the private sector.
7.In electronic mail, the sender composes a message employing a program on his or her computer called a ______. The message is posted on a ______, which transmits the packets to its counterpart at the destination’s address.
(correct choices plus distractors)
anonymous FTP serverARPANETclient
Domain Name System (DNS)Domain Name System serverse-mail
framesFTPInternet2
local hostmail serverrouters
remote hostserverTCP
telnetUDPUNIX
user agentWorld Wide Web
Short Essay Questions
1.Describe how the characteristics and specifications for the experimental ARPANET were influential in the growth and success of the Internet as we know it today.
2.What is the relationship of the World Wide Web and the Internet? Explain.
3.The layered architecture of TCP/IP hides the complexity of Internet communications from the user who need only interact with the interface of an Internet (client) application program. This layered architecture also offers advantages to software developers who create these programs. Describe some of these advantages. Specifically, how does the layered architecture of TCP/IP simplify the development and implementation of networking software?
4.The Internet like other forms of communication and transportation requires an infrastructure to support it. Highways and roads, for example, have generally been funded and managed by federal, state, and local governments. On the other hand, telephone service has always been a province of the private sector. What role should governments and public funding play in supporting the Internet? What role should private enterprise take? Explain your viewpoints on these.
5.In what ways do you employ the Internet? How has the Internet affected the way in which you work with computers? Explain. Have these been beneficial or not? Explain.