SOLVED

71) ________ are private, third-party-managed medium-speed WANs that are shared by multiple organizations. A) Value-added networks B) Enterprise networks C) Global networks D) Local area networks E) Personal area networks 72) A(n) ________ is an emerging technology that uses wireless communication to exchange data between computing devices using short-range radio communication, typically within an area of 10 meters. A) value-added network B) local area network C) personal area network D) enterprise network E) campus area network 73) ________ are network services that include the storing, accessing, and delivering of text, binary, graphic, and digitized video and audio data across a network. A) Print services B) File services C) Message services D) Application services E) Software services 74) The high-speed central networks to which many smaller networks can be connected are known as ________. A) last-mile networks B) ISPs C) Internet exchange points D) private branch exchanges E) backbones 75) Which of the following wireless communication technologies uses high-frequency light waves to transmit data on an unobstructed path between nodes—computers or some other device such as a printer—on a network at a distance of up to 24.4 meters? A) Bluetooth B) wireless LAN C) high-frequency radio D) infrared line of sight E) microwaves 76) WLANs based on a family of standards called 802.11 are also referred to as ________. A) Bluetooth B) wireless fidelity C) ethernet D) personal area networks E) infrared line of sight 77) Which of the following is a characteristic of terrestrial microwave communication? A) high attenuation B) speeds up to 16 Mbps C) low expense D) high susceptibility to eavesdropping E) low electromagnetic interference 78) ________ is the set of rules that governs how a given node or workstation gains access to the network to send or receive data. A) Media access control B) Logical link control C) Hypertext transfer protocol D) File transfer protocol E) Internet control message protocol 79) ________ is a commonly used method of random access control, in which each workstation “listens” to traffic on the transmission medium (either wired or wireless) to determine whether a message is being transmitted. A) Code division multiple access B) Carrier sense multiple access C) Hybrid coordination function D) Group packet radio service E) Point coordination function 80) In a(n) ________ network all nodes or workstations are connected to a central hub, or concentrator, through which all messages pass. A) ring B) bus C) star D) mesh E) tree