Mis chapter 7

Chapter 7 Telecommunications, the Internet, and Wireless Technology

1) Telephone networks are fundamentally different from computer networks. Answer: TRUE

2) Increasingly, voice, video, and data communications are all based on Internettechnology. Answer: TRUE

3) To create a computer network, you must have at least two computers. Answer: TRUE

4) An NOS must reside on a dedicated server computer in order to manage a network. Answer: FALSE

5) A hub is a networking device that connects network components and is used to filter and forward data to specified destinations on the network. Answer: FALSE

6) In a client/server network, a network server provides every connected client with an address so it can be found by others on the network. Answer: TRUE

7) Central large mainframe computing has largely replaced client/server computing. Answer: FALSE

8) Circuit switching makes much more efficient use of the communications capacity of a network than does packet switching. Answer: FALSE

9) A protocol is a standard set of rules and procedures for the control of communications in a network. Answer: TRUE

10) Two computers using TCP/IP can communicate even if they are based on different hardware and software platforms. Answer: TRUE

11) In a ring topology, one station transmits signals, which travel in both directions along a single transmission segment. Answer: FALSE

12) Coaxial cable is similar to that used for cable television and consists of thickly insulated copper wire. Answer: TRUE

13) Fiber-optic cable is more expensive and harder to install than wire media. Answer: TRUE

14) The number of cycles per second that can be sent through any telecommunications medium is measured in kilobytes. Answer: FALSE

15) The Domain Name System (DNS) converts IP addresses to domain names. Answer: FALSE

16) VoIP technology delivers video information in digital form using packet switching. Answer: TRUE

17) Web 3. 0 is a collaborative effort to add a layer of meaning to the existing Web in order to reduce the amount of human involvement in searching for and processing Web information. Answer: TRUE

18) Wi-Fi enables users to freely roam from one hotspot to another even if the next hotspot is using different Wi-Fi network services. Answer: FALSE

19) WiMax has a wireless access range of up to 31 miles. Answer: TRUE

20) RFID has been exceptionally popular from the technology’s inception because of its low implementation costs. Answer: FALSE

21) The device that acts as a connection point between computers and can filter and forward data to a specified destination is called a(n)

• A) hub.
• B) switch.
• C) router.
• D) NIC.

22) The Internet is based on which three key technologies?

• A) TCP/IP, HTML, and HTTP
• B) TCP/IP, HTTP, and packet switching
• C) client/server computing, packet switching, and the development of communications standards for linking networks and computers
• D) client/server computing, packet switching, and HTTP

23) The method of slicing digital messages into parcels, transmitting them along differentcommunicationpaths, and reassembling them at their destinations is called

• A) multiplexing.
• B) packet switching.
• C) packet routing.
• D) ATM.

24) The telephone system is an example of a ________ network.

• A) peer-to-peer
• B) wireless
• C) packet-switched
• D) circuit-switched

25) Which of the following is not a characteristic of packet switching?

• A) Packets travel independently of each other.
• B) Packets are routed through many different paths.
• C) Packet switching requires point-to-point circuits.
• D) Packets include data for checking transmission errors.

26) In TCP/IP, IP is responsible for

• A) disassembling and reassembling of packets during transmission.
• B) establishing an Internet connection between two computers.
• C) moving packets over the network.
• D) sequencing the transfer of packets.

27) In a telecommunications network architecture, a protocol is

• A) a device that handles the switching of voice and data in a local area network.
• B) a standard set of rules and procedures for control of communications in a network.
• C) a communications service for microcomputer users.
• D) the main computer in a telecommunications network.

28) What are the four layers of the TCP/IP reference model?

• A) physical, application, transport, and network interface
• B) physical, application, Internet, and network interface
• C) application, transport, Internet, and network interface
• D) application, hardware, Internet, and network interface

29) Which signal types are represented by a continuous waveform?

• A) laser
• B) optical
• C) digital
• D) analog

30) To use the analog telephone system for sending digital data, you must also use

• A) a modem.
• B) a router.
• C) DSL.
• D) twisted wire.

31) Which type of network is used to connect digital devices within a half-mile or 500-meter radius?

• A) microwave
• B) LAN
• C) WAN
• D) MAN

32) Which of the following Internet connection types offers the greatest bandwidth?

• A) T3
• B) DSL
• C) cable
• D) T1

33) Which type of network would be most appropriate for a business that comprised three employees and a manager located in the same office space, whose primary need is to share documents?

• A) wireless network in infrastructure mode
• B) domain-based LAN
• C) peer-to-peer network
• D) campus area network

34) In a bus network

• A) signals are broadcast to the next station.
• B) signals are broadcast in both directions to the entire network.
• C) multiple hubs are organized in a hierarchy.
• D) messages pass from computer to computer in a loop.

35) All network components connect to a single hub in a ________ topology.

• A) star
• B) bus
• C) domain
• D) peer-to-peer

36) The most common Ethernet topology is

• A) bus.
• B) star.
• C) ring.
• D) mesh.

37) A network that ps a city, and sometimes its major suburbs as well, is called a

• A) CAN.
• B) MAN.
• C) LAN.
• D) WAN.

38) A network that covers broad geographical regions is most commonly referred to as a(n)

• A) local area network.
• B) intranet.
• C) peer-to-peer network.
• D) wide area network.

39) ________ work by using radio waves to communicate with radio antennas placed within adjacent geographic areas.

• A) Cell phones
• B) Microwaves
• C) Satellites
• D) WANs

40) Bandwidth is the

• A) number of frequencies that can be broadcast through a medium.
• B) number of cycles per second that can be sent through a medium.
• C) difference between the highest and lowest frequencies that can be accommodated on a single channel.
• D) total number of bytes that can be sent through a medium per second.