Data Comm Chapter 1

The personal area network was created in the late ____. a. 1970s c. 1990s b. 1980s d. 2000s

1990s

A modem and a dial-up telephone service provides data transfer rates of approximately ____. a. 56,000 bits per second (56 kbps) c. 128,000 bits per second (128 kbps) b. 112,000 bits per second (112 kbps) d. 256,000 bits per second (256 kbps)

56,000 bits per second (56 kbps)

____ ensures that the network does not become saturated at any one point. a. End-to-end error control c. End-to-end flow control b. Congestion control d. Synchronization points control

Congestion control

11. The OSI model tells us what kind of wire or what kind of connector to use to connect the pieces of a network.

F

12. The application layer of the OSI model is responsible for token management.

F

14. The network layer of the OSI model is an end-to-end layer.

F

18. SNMP is used to allow users to send and receive electronic mail.

F

2. Some people call computer terminals thick-client workstations.

F

5. It is not possible to connect two local area networks so that they can share peripherals as well as software.

F

6. Metropolitan area networks can transfer data at fast, LAN speeds but over smaller geographic regions than typically associated with a local area network.

F

9. By the 1970s, telephone systems carried more computer data than voice.

F

____ is the transmission of multiple signals on one medium. a. Multiplexing c. Modem b. Codec d. Package

Multiplexing

1. ____ is the design, installation, and support of a network and its hardware and software. 4 a. Convergence c. Data network b. Voice network d. Network management

Network management

The International Organization for Standardization (ISO) created the ____ reference model in an attempt to standardize the design of communication systems and the interoperability between their components. a. Open Systems Interconnection (OSI) c. FTP b. TCP/IP d. ASCII

Open Systems Interconnection (OSI)

____ are the computers that store network software and shared or private user files. a. Switches c. Servers b. Routers d. Hubs

Servers

____ is used to allow the numerous elements within a computer network to be managed from a single point. a. Simple Network Management Protocol (SNMP) b. Simple Mail Transfer Protocol (SMTP) c. Telnet d. File Transfer Protocol (FTP)

Simple Network Management Protocol (SNMP)

____ are more advanced devices that are replacing hubs and are capable of filtering out unnecessary traffic. a. Switches c. Servers b. Routers d. Workstations

Switches

1. Data is information that has been translated into a form that is more conducive to storage, transmission, and calculation.

T

10. Network architectures are cohesive layers of protocols defining a set of communication services.

T

13. The session layer of the OSI model is responsible for establishing synchronization points.

T

15. The data link layer of the OSI model can incorporate some form of error detection software.

T

16. The TCP/IP protocol suite does not have rigidly defined layers as the OSI model does.

T

17. Telnet is used to allow a remote user to log in to another computer system.

T

19. The lowest layer of the TCP/IP protocol suite is the network access or physcial layer.

T

20. In a network architecture, as the packet moves up through the layers, the data packet shrinks in size.

T

3. A type of microcomputer-to-local area network connection that is growing in popularity is the wireless connection.

T

4. To communicate with the Internet using a dial-up modem, a user's computer must connect to another computer that is already communicating with the Internet.

T

7. The Internet is not a single network but a collection of thousands of networks.

T

8. One of the most explosive areas of growth in recent years has been cellular phone networks.

T

Internet "talks" only ____, so users must use software that supports this protocol. a. IPX/SPX c. TCP/IP b. DSL d. FTP

TCP/IP

The ____ suite was not created by a standards-making organization but by a group of computer scientists. a. OSI model c. OSI model b. FTP protocol d. TCP/IP protocol

TCP/IP protocol

____ is a service that controls which user's computer talks when during the current session by passing a software token back and forth. a. Token management c. Character conversion b. Synchronization point d. Encryption/decryption

Token management

A ____ is an interconnection of computers and computing equipment using either wires or radio waves over small or large geographic areas. a. personal area network (PAN) c. wireless network b. computer network d. local area network (LAN)

a. computer network

The TCP/IP ____ layer supports network applications and may include presentation services. a. transport c. network b. application d. network access

application

In a(n) ____ system, a user at a microcomputer, or client machine, issues a request for some form of data or service a. wireless c. bridge b. client/server d. Internet

client/server

A ____ is a device that is essentially a keyboard and screen with no long-term storage capabilities and little, if any, processing power. a. protocol c. thick-client b. mainframe d. computer terminal

computer terminal

The addition of control information to a packet as it moves through the layers is called ____. a. encapsulation c. payload b. overloading d. filtering

encapsulation

The ____ in a network architecture define a model for the functions or services that need to be performed. a. servers c. routers b. workstations d. layers

layers

A(n) ____ connection is a nonphysical connection between sender and receiver that allows an exchange of commands and responses. a. physical c. real b. encapsulated d. logical

logical

A ____ is a high-speed network that interconnects multiple sites within a close geographic region, such as a large urban area. a. metropolitan area network (MAN) c. local area network (LAN) b. wide area network (WAN) d. personal area network (PAN)

metropolitan area network (MAN)

The TCP/IP ____ layer, sometimes called the Internet layer, is roughly equivalent to OSI's network layer. a. network access c. transport b. application d. network

network

The ____ layer of the OSI model performs congestion control a. network c. physical b. data link d. session

network

The bottom layer in the OSI model—the ____ layer—handles the transmission of bits over a communications channel. a. data link c. physical b. application d. network

physical

The ____ layer of the OSI model performs a series of miscellaneous functions necessary for presenting the data package properly to the sender or receiver. a. transport c. applications b. presentation d. session

presentation

The devices that usually connect two or more LANs are the switch, bridge, and ____. a. workstation c. server b. access point d. router

router

Connecting two wide area networks requires devices such as high-speed ____. a. hubs c. bridges b. routers d. reflectors

routers

The ____ layer is the least used layer of the OSI model. a. network c. transport b. application d. session

session

The TCP/IP ____ layer commonly uses the Transmission Control Protocol (TCP) to maintain an error-free end-to-end connection. a. network c. transport b. network access d. application

transport

The ____ layer of the OSI model makes sure the data received at the very end of a transmission is exactly the same as the data originally transmitted. a. application c. transport b. session d. network access

transport

The ____ layer of the OSI model performs end-to-end error control and end-to-end flow control. a. application c. transport b. presentation d. session

transport