Chapter 3 Flashcards
Which of the following is a (are) primary reason(s) for networking an organization’s computers together?
sharing of peripherals such as printers
sharing of data
enables client/server applications
The following is are primary functions performed by a telecommunications network?
tracking of out-of-service devices
transmission of data
transmission of voice
Which of the following most accurately describes the conversion function of telecommunications?
changing coding system or speed when moving data between devices on the network
Which of the following most accurately describes the routing function of telecommunications?
choosing the most efficient path for a message to be sent over the Internet
Which statement about Wi-Fi is true?
A) Wi-Fi is a wireless technology for local area networks.
B) Wi-Fi is used in buildings with wired LANs to enable mobile access to the organizational networks.
C) Wi-Fi networks use a CSMA/CA protocol to avoid message failures.
Which of the following is not an advantage of a wireless LAN versus a wired LAN?
faster transmission speed and more secure
Which transmission medium requires an unobstructed straight line between the transmitter and the receiver?
microwave
Characteristics of fiber-optic transmission?
faster transmission than twisted pair of wires
more secure than other media because it does not emit radiation
not affected by power-line surges or electromagnetic interference
Characteristic of a star network topology?
relatively easy to identify which cable has failed
if central device fails, whole network fails
easy to add additional devices
Which type of technology relies on line-of-sight transmission?
satellite
about active RFID tags
They can transmit information continuously, on request, or on a predetermined schedule.
They have their own power supply.
They are more expensive than passive tags.
about Bluetooth
It is short-range radio technology built into a microchip.
It enables cellular communication with home appliances as well as permitting wireless communication between a computer and a mouse, keyboard, and printer.
Bluetooth technology standards are available free of royalties to any company that wishes to use them.
The term Ethernet is often used as a synonym with which of the following types of local area networks:
contention bus network.
Which statement describes a major difference between a LAN and a WAN?
A) usage by a corporation
B) geographic distance between devices being networked
C) usage of wireless media
The CSMA/CD and CSMA/CA protocols are designed to manage which of the following:
message collisions.
A private, packet-switched network using the public Internet is referred to as a(n):
VPN network
statements about network topologies
A) A bus topology can be thought of as a simple “linear” topology.
B) A ring topology is wired like a bus, except the ends of the cable are connected.
C) In a mesh topology, devices are directly connected to two, three, or more other devices in a seemingly irregular pattern.
A broadband service offered by telephone companies that uses copper wires already installed in homes and offices to connect to the Internet is referred to as:
DSL.
When considering network protocols, why is the multilayer OSI model still important?
It provides a conceptual framework for how communication takes place in networks.
Which of the following OSI model layers receives a packet of data from the transport layer and adds header data to it to identify the route the packet is to take to its destination?
network
Which of the following network protocols is used on the Internet and has become the de facto standard protocol for networking around the world?
TCP/IP
By 2004, the number of cell phones in use in the United States was greater than the number of wired phones in homes
True
Using an Infrastructure as a Service provider can enable an organization to avoid major capital investments for network equipment as well as computer servers and storage.
True
When data can be transmitted in both directions on a telecommunications line, but not simultaneously, the transmission type is referred to as ____________________.
half-duplex
A Universal Resource Locator (URL) is used to locate packets in a network.
False; A URL is the address of a particular Web site, and is used to jump to that Web site.
