ITE 100 Chapter 9 Review, Communications & Networks

____ 1. If you have 7 light bulbs (each bulb can be ON or OFF), how many different messages can be represented ?

a.	8
b.	16
c.	64
d.	128

____ 2. Examples of _____ are coaxial TV cables, copper telephone lines,FiOS cables, & wireless.

a.	sending devices	c.	receiving devices
b.	communications channels	d.	communications devices

____ 3. A type of communications device that connects a communications channel to a sending or receiving device is a (n) _____.

a.	Cable, DSL, FiOS or satellite modem	c.	DVD-RW drive
b.	Hard disk drive	d.	Solid State Drive (SSD)

____ 4. _____ is a conversation that takes place over the Internet using a telephone connected to a desktop computer, mobile computer, or mobile device Hint: Vonage.com, Comcast.net

a.	A chat room	c.	Internet telephony (VoIP)
b.	An instant message (IM)	d.	An online meeting

____ 5. _____ is a real-time Internet communication service that allows wireless mobile devices such as PDAs or smart phones to exchange messages with one or more mobile devices or online users.

a.	A chat room	c.	telephone
b.	Wireless instant message (IM)	d.	A voice mail system

____ 6. Most outdoor hot spots or access points (APs) for Wi-Fi wireless networks span a range of _____ feet.

a.	33	c.	300
b.	50	d.	1500

____ 7. A GPS receiver is a handheld, mountable, or embedded device that contains all of the following except a(n) _____.

a.	radio receiver	c.	U7 flash drive
b.	antenna	d.	microprocessor

____ 8. The Global Positioning System (GPS) consists of _____ satellites flying at an elevation of _______ miles above the planet Earth. Lockheed-Martin was awarded a $1.5 billion contract to improve the security of the GPS, among other things. (Chapter 9 PowerPoint lecture)

a.	31 12,000	c.	15 5,000
b.	24 10,000	d.	10 10,000

____ 9. Groupware is a component of a broad concept called _____, which includes network hardware and software that enables group members to communicate, manage projects, schedule meetings, and make decisions.

a.	public Internet access	c.	Web services
b.	workgroup computing	d.	short message service

____ 10. A voice mailbox is really a(n) _____ in a voice mail system.

a.	storage location(folder) on a hard disk	c.	processor
b.	input device	d.	output device

____ 11. Businesses are the primary users of _____ because this technology provides a means for departments to communicate with each other, suppliers, vendors, and with clients. Different applications from different platforms can communicate with each other by sending properly formatted XML (eXtensible Markup Language) to this service.

a.	groupware services	c.	global positioning services (GPS)
b.	Web services	d.	Short Message Services (SMS)

____ 12. Most businesses use a standard, such as _____, that defines how data transmits across telephone lines or other means. It reduces the the amount of paperwork used by businesses.

a.	PCS (Personal Communications Services)
b.	EFT (Electronic Funds Transfer)
c.	PDS (Public Data Services)
d.	EDI (Electronic Data Interchange)

____ 13. Examples of Internet P2P file sharing software include LimeWire, KaZaA and ________.

This software permits access to the hard drives of other connected users which can make it easier for computer viruses and malware to spread.

a.	ShareDrives	c.	SharePoint
b.	ShareFiles	d.	BitTorrent

____ 14. A _____ is a network that connects computers and devices in a limited geographical area, such as a home, school computer laboratory, or office building.

a.	local area network (LAN)	c.	wide area network (WAN)
b.	metropolitan area network (MAN)	d.	variable area network (VAN)

____ 15. Each computer or device on a local area network, called a _____, often shares resources such as printers, copy machines, large hard disks, and programs.

a.	hub	c.	token
b.	server	d.	node

____ 16. A _____ is a high-speed network that connects networks in an area such as a city or town and handles the bulk of communications activity across that region.

a.	local area network (LAN)	c.	wide area network (WAN)
b.	metropolitan area network (MAN)	d.	variable area network (VAN)

____ 17. A _____ is a network that covers a large geographic area, such as a city, country, or the world, using a communications channel that combines many types of media.

a.	local area network (LAN)	c.	wide area network (WAN)
b.	metropolitan area network (MAN)	d.	variable area network (VAN)

____ 18. The (building) design of computers, devices, and media in a network, sometimes called the _____, is categorized as either client/server or peer-to-peer.

a.	network topology	c.	network standard
b.	network architecture	d.	network protocol

____ 19. In communications, bandwidth is a measure of the number of __________ that a channel can carry. Broadband channels include Cable, DSL, ATM and optical fiber (FiOS) networks.

a.	frequencies	c.	packets
b.	bytes	d.	bits

____ 20. The genius of the cell phone system is the division of a city area into cells which allows extensive reuse of frequencies across the city so that millions of people can use cell phones at the same time. In an analog cell phone system, each carrier such as Verizon or T-Mobile gets _______ frequencies to use across the area. (Source: Chapt 9 Lecture Slides)

a.	1,000 (one thousand)	c.	100,000 (one hundred thousand)
b.	832	d.	one million

____ 21. Free Space Optics (FSO) is a technology that uses light propagating in free space to transmit data between two points using infrared techniques. Where is this technology used ?

(Source: Chapter 9 PowerPoint lecture)

a.	on ocean oil rigs around the world	c.	in cities where laying cable is difficult
b.	in farm areas of the United States	d.	between satellites in space

____ 22. A network server is a dedicated computer server that _____.

a.	serves up Web pages	c.	provides access to a database
b.	manages printers and print jobs	d.	manages network traffic activity

____ 23. The risk to a bus network is that _____.

a.	devices attached or detached at any point on the bus can disrupt the rest of the network
b.	the failure of one device usually affects the rest of the network
c.	the bus itself might become inoperable
d.	none of the above

____ 24. A ring network (e.g. Token Ring) _____ to install.

a.	must span a smaller distance than a bus network, and it is more difficult
b.	must span a smaller distance than a bus network, but it is easier
c.	can span a larger distance than a bus network, but it is more difficult
d.	can span a larger distance than a bus network, and it is easier

____ 25. On a _____, such as the one illustrated in the accompanying figure, all of the computers and devices (nodes) on the network connect to a central device such as a switch or hub.

a.	bus network	c.	star network
b.	ring network	d.	token ring network

____ 26. On a network such as the one illustrated in the accompanying figure, the central device that provides a common connection point for nodes on the network is called the _____.

a.	hub or switch	c.	printer
b.	personal computer	d.	file server

____ 27. On a network such as the one illustrated in the accompanying figure, if one node fails _____.

a.	only that node is affected
b.	only the nodes before that node are affected
c.	only the nodes after that node are affected
d.	all the nodes are affected

____ 28. Today, _____ is the most popular LAN technology standard because these networks are relatively inexpensive and easy to install and maintain. These networks are based on the bus topology, but can be wired into a star pattern. Data speeds range from 10 Mbps to 10 Gbps

a.	Ethernet	c.	TCP/IP
b.	Token Ring	d.	EV-DO

____ 29. _____ has been adopted as a network standard for Internet communications. It handles both error checking and data packet management. It provides addresses for each packet, sequences the packets, and regulates the flow of messages on the network.

a.	FTP	c.	TCP/IP software
b.	SMTP	d.	HTTP

____ 30. When a computer sends data over the Internet, the data is divided into small pieces, or _____.

a.	bundles	c.	chunks
b.	packets having up to 1500 bytes each	d.	blocks

____ 31. The technique of breaking a message into individual packets, sending the packets along the best route available, and then reassembling the data is called _____.

a.	packet catching	c.	packet switching
b.	packet building	d.	packet swapping

____ 32. One popular use of the _____ standard is in public Internet access points that offer mobile users the ability to connect to the Internet with their wireless computers and devices. Many businesses and other organizations are now installing these types of networks.

a.	Ethernet	c.	TCP/IP
b.	Token Ring	d.	Wi-Fi 802.11g or 802.11n

____ 33. Communications software consists of programs that _____.

a.	help users establish a connection to another computer or network
b.	manage the transmission of data, instructions, and information
c.	provide an interface for users to communicate with one another
d.	all of the above

____ 34. Although _____ are NOT a type of standard telephone line, they are a relatively easy way for the home user to connect to the Internet.

a.	T-carrier lines such as T-3	c.	T-carrier lines such as T-1
b.	digital subscriber lines (DSL)	d.	cable television (CATV) lines

____ 35. With ISDN, the same telephone line that could carry only one computer signal now can carry three or more signals at once through the same line, using a technique called _____.

a.	packet switching	c.	multiplexing
b.	routing	d.	modulating

____ 36. ________ is a network standard that specifies how two _____ devices use short-range radio waves to communicate at high speeds. At distances of 33 feet, the data transfer rate is 110 Mbps. It can transmit signals through doors, and can be used to wirelessly transfer movies from a digital video camera. [Page 478, Chapter 9]

a.	ATM (Asynchronous Transfer Mode)
b.	Bluetooth
c.	TCP/IP
d.	UWB or Ultra-wideband

____ 37. In the United States, the most popular T-carrier line is the _____.

a.	T1 line	c.	T3 line
b.	T2 line	d.	T4 line

____ 38. A T3 line is _____.

a.	slower than a T1 line and quite expensive
b.	slower than a T1 line but quite inexpensive
c.	equal in speed to 28 T1 lines and more expensive than a T1 line
d.	equal in speed to 28 T2 lines and not expensive

____ 39. For data transmission to occur, _____ on a standard telephone line must have a dial-up modem.

a.	only the sending end	c.	both the sending and receiving ends
b.	only the receiving end	d.	neither the sending nor receiving end

____ 40. A _____ is a device that provides a central point for connecting cables in a network.

a.	hub, switch, or router	c.	wireless print server
b.	packet	d.	wireless network interface card (NIC)

____ 41. Networked computers in a typical home or small office can _____.

a.	share a single high-speed Internet connection
b.	access files and programs on other computers in the house
c.	share peripherals such as a printer, scanner, external hard drive, or copy machine
d.	all of the above

____ 42. A(n) _____ extends the basic home network to include features such as lighting control, thermostat adjustment, and a security system.

a.	peripheral home network	c.	wired home network
b.	value-added home network	d.	intelligent home network

____ 43. Types of wired home networks include all of the following except _____.

a.	Ethernet cables	c.	powerline cable
b.	Wi-Fi 802.11g or Wi-Fi Super G	d.	telephone line

____ 44. For the best performance of a communications channel, the _____.

a.	bandwidth and latency should be low
b.	bandwidth should be low and latency high
c.	bandwidth should be high and latency low
d.	bandwidth and latency should be high

____ 45. Physical transmission media used in communications include all of the following except _____.

a.	Category-5 twisted-pair cable	c.	broadcast radio cable
b.	coaxial cable for cable TV	d.	fiber-optic cable

____ 46. The range for IEEE 802.16 WIMAX wireless networks can extend to a distance of ______and in some cases, cover entire cities.

a.	10 miles	c.	100 miles
b.	30 to 35 miles	d.	none of the above

____ 47. Fiber-optic cables have all of the following advantages over cables that use wire except _____.

a.	lower costs and easier installation and modification
b.	faster data transmission and smaller size
c.	less susceptible to noise from other devices
d.	better security for signals during transmission

____ 48. Broadcast radio is _____ susceptible to noise than wired physical transmission media but it provides flexibility and portability.

a.	slower and more	c.	faster and more
b.	slower and less	d.	faster and less

____ 49. ___ is a category of cellular radio transmission that transmits data between 144,000 bps & 2 Mbps Today, most cell phone systems (e.g. Apple’s iPhone) are digital and in this generation.

a.	3G (third generation)	c.	1G (first generation)
b.	2G (second generation)	d.	4G (fourth generation)

____ 50. Microwave transmission, sometimes called _____, involves sending signals from one microwave station to another. Microwave towers are typically 25 to 30 miles apart.

a.	line-of-sight (LOS) transmission	c.	out-of-sight transmission
b.	flexed-point wireless	d.	fixed wireless