MIT310; Test 2; Chapter 6

When a call is placed on a cellular phone, the signal is first transmitted to the closest , which sends a signal through landlines that dial the desired phone number. a. modem b. hotspot c. transceiver d. router

c. transceiver

The speeds of transmitting into a network are referred to as speeds. a. nodal b. download c. upstream d. downstream

c. upstream

The Greek word tele, which means " ," is part of such words as "telephone," "teleconference," and other words referring to technologies that allow communications over large distances. a. far b. path c. away d. distance

d. distance

An alternative for households that cannot obtain cable or DSL connections to the Internet is . a. optical carriers b. T1 lines c. T3 lines d. fixed wireless

d. fixed wireless

A is a common device often used as a central location to connect computers or devices to a local network. a. repeater b. bridge c. router d. switch

d. switch

Coaxial cable connects to network devices with RJ-45 plug-in connectors. • True • False

False

FTTH is point-to-point transmission between two stationary devices, usually between two buildings, as opposed to mobile wireless, in which people carry a mobile device. • True • False

False

Fiber optic technology uses electricity to represent bits. • True • False

False

IEEE 802.15 is a family of wireless protocols, collectively known as Wi-Fi. • True • False

False

Optical fibers can carry signals over relatively shorter distances compared to other media. • True • False

False

Organizations avoid telecommunications because these increase costs and office space. • True • False

False

Telecommunication companies offering fixed wireless service require franchise licenses. • True • False

False

Telecommunications has made business processes less efficient. • True • False

False

The bit rates of DSL lines usually have no relation to the distance of the subscriber's computer from the regional central office of the telephone company. • True • False

False

The simplest WAN is a satellite linkup between LANs in two different countries. • True • False

False

WiMAX is a wide area network (WAN) technology. • True • False

False

With digital subscriber line (DSL), the data is transformed into analog signals. • True • False

False

can be very tiny, about the size of a rice grain, or several square inches, depending on the amount of information they need to contain and the environment in which they are used. a. Infrared Data Association cards b. Radio Frequency Identification tags c. Bluetooth ports d. Micro tags

b. Radio Frequency Identification tags

allow Internet access to anyone within range who uses a wireless-equipped device, provided logging in is not limited by controlled access codes. a. Hotspots b. VANs c. Intranets d. VPNs

a. Hotspots

The standard was developed for devices that communicate with each other within a short range of up to 10 meters (33 feet) in the office, at home, and in motor vehicles. a. Wi-Fi b. Bluetooth c. WiMAX d. MBWA

b. Bluetooth

is a standard method of wireless communications, specifically for high-speed data transmission for mobile phones. a. Near-field communication b. Long-Term Evolution c. Bluetooth d. WiMAX

b. Long-Term Evolution

span a greater distance than LANs and usually have more complicated networking equipment for midrange communications. a. WANs (wide area networks) b. MANs (metropolitan area networks) c. peer-to-peer LANs d. PANs (personal area networks)

b. MANs (metropolitan area networks)

The number next to refers to data speed in multiples of 51.84 Mbps, considered the base rate bandwidth of a very high connection speed service. a. DSL b. OC c. Wi-Fi d. BPL

b. OC

Which of the following statements is true about radio frequency identification tags? a. They need enormous power. b. They are not always flat. c. They do not have a memory to store data. d. They should be several square inches in size.

b. They are not always flat.

fulfill organizational needs for reliable data communications while relieving the organization of the burden of providing its own network management and maintenance. a. Leased lines b. VANs c. Dial-up connections d. LANs

b. VANs

A can be thought of as a "tunnel" through the Internet or other public network that allows only authorized users to access company resources. a. peer-to-peer LAN b. VPN c. WLAN d. WAN

b. VPN

A is a device that connects two networks, such as a LAN, to the Internet. a. switch b. bridge c. router d. modem

b. bridge

Bluetooth is considered a technology, because it typically supports a network used by only one person. a. metropolitan area network b. personal area network c. wide area network d. local area network

b. personal area network

A can connect dissimilar networks and can be programmed to also act as a firewall to filter communications. a. switch b. router c. repeater d. modem

b. router

The major advantage of mobile phone is that . a. they use Internet-based phone services b. they are attached to people c. they create a virtual private network d. they are attached to offices

b. they are attached to people

is a popular medium for connecting computers and networking devices because it is relatively flexible, reliable, and low cost. a. Coaxial cable b. Twisted pair cable c. Twinaxial cable d. Optical fiber

b. twisted pair cable

A computer network within a building, or a campus of adjacent buildings, is called a . a. MAN (metropolitan area network) b. WAN (wide area network) c. LAN (local area network) d. PAN (personal area network)

c. LAN (local area network)

The most important and pervasive set of protocols for telecommunications and networks today is called . a. NFC b. WPA c. TCP/IP d. CDMA

c. TCP/IP

The proliferation of highspeed connection services, also called , is mainly the result of businesses' and individuals' rush to the Internet. a. baseband services b. static services c. broadband services d. bridge services

c. broadband services

is a standard communication protocol to create a radio connection between two devices. a. Long-term evolution b. Voice over Internet protocol c. Near-field communication d. Metropolitan area communication

c. near-field communication

The bandwidth of a communication medium is measured as . a. data per second b. rates per second c. codes per second d. bits per second

d. bits per second

A computer connected directly to the Internet backbone—the highest speed communication channels—is called a host. • True • False

True

A direct link to a wireless router or access point creates a hotspot. • True • False

True

A peer-to-peer LAN is one in which no central device controls communications. • True • False

True

A repeater amplifies or regenerates signals so that they do not become weak or distorted. • True • False

True

Each generation of mobile communication technologies refers to a communication protocol or a combination of protocols. • True • False

True

IEEE 802.16, Worldwide Interoperability for Microwave Access (WiMAX), increases the range and speed of wireless communication. • True • False

True

Radio frequency identification (RFID) technology enables us to conduct transactions and to make payments quickly. • True • False

True

The Wi-Fi Protected Access (WPA) and WPA2 security protocols offer encryption. • True • False

True

The important factors in choosing a networking medium are availability, current and potential bandwidth, and vulnerability to electromagnetic interference (EMI) or radio frequency interference (RFI). • True • False

True

The process of associating a character-based name such as course.com with an IP address is called domain name resolution, and the domain name resolution service is DNS (Domain Name System). • True • False

True

The use of e-mail, instant messaging, and voice mail has brought some secondary benefits to business communications by establishing a permanent written or electronic record of, and accountability for, ideas. • True • False

True

There are three basic types of networks: LANs, MANs, and WANs. • True • False

True

When a line is capable of carrying multiple transmissions simultaneously, it is said to be broadband. • True • False

True

A line is made of 24 channels (groups of wires) of 64 Kbps each. a. T1 b. T2 c. T3 d. T4

a. T1

are point-to-point dedicated digital circuits provided by telephone companies. a. T1 and T3 lines b. Nodes c. Optical carriers d. Microwaves

a. T1 and T3 lines

is a standard for software that digitizes and compresses voice signals and transmits the bits via the Internet link. a. VoIP b. SoIP c. IRC d. TCP/IP

a. VoIP

The first generation of mobile communication technologies used . a. circuit switching b. packet switching c. digital voice encoding d. GSM and CDMA protocols

a. circuit switching

With , data transmitted to computers from a telephone company's switching center remains digital throughout the entire transmission. a. digital subscriber line b. dial-up connections c. normal landline telephone service d. cable modems

a. digital subscriber line

The ability to scramble and code messages through keys that are shared only between the sender and receiver is referred to as _____. a. encryption b. decryption c. transcription d. transmission

a. encryption

are high-frequency radio waves that can carry signals over long distances with high accuracy. a. Microwaves b. Shortwaves c. Mediumwaves d. Kilometer waves

a. microwaves

The major downside of internet service provided by television cable firms is that cable . a. nodes are shared by all the subscribers connected to the cable b. cannot provide Internet access c. networks are not as secured as other networking services d. provides services only to one subscriber at a time

a. nodes are shared by all the subscribers connected to the cable

Businesses use to save on travel costs and lodging, car fleets, and the time of highly salaried employees incurred on bringing together employees working in different organizations or at different sites in the same organization. a. videoconferencing b. access points c. hotspots d. graphic communications

a. videoconferencing