Deck 6: Data Communications

Question 1

What is the performance guarantee offered by SDSL connections?

A) They provide dedicated lines for data transmission.
B) They offer the same fast speed in both directions.
C) They offer higher download speeds than ADSL lines.
D) They offer a data backup and recovery service.

Answer 1

B

Question 2

Which of the following statements about LAN protocols is true?

A) The access point uses both the 802.3 and 802.11 standards.
B) The IEEE 802.11 protocol is also called Ethernet.
C) The switch operates on the 802.11 standard.
D) WNICs operate on the 802.3 protocol and communicate with the switch.

Answer 2

A

Question 3

The distinguishing characteristic of a LAN is ________.

A) that it connects multiple locations
B) that it connects at a single location
C) that it is a network of networks
D) that all lines need not reside on the company's premises

Answer 3

B

Question 4

________ is a common wireless protocol used for transmitting data over short distances.

A) NIC
B) Broadband
C) Cable
D) Bluetooth

Question 5

The WNIC devices connect to a(n)________,which is the component of the LAN device that processes wireless traffic and communicates with the wired switch.

A) router
B) PSDN
C) optical fibre cable
D) access point

Question 6

Which protocol standard used for wired LAN connections specifies hardware characteristics,such as which wires carry which signals?

A) intranet
B) WiMax
C) Ethernet
D) EVDO

Question 7

Which of the following protocols are commonly used by LAN?

A) IEEE 802.11g
B) DSL
C) Cable
D) WiMax

Question 8

The IEEE 802.3 protocol standard is also known as ________.

A) TCP/IP
B) Ethernet
C) Bluetooth
D) HTTP

Question 9

A ________ must be used to convert a computer's digital data to an analog,or wavy,signal.

A) tunnel
B) switch
C) modem
D) router

Question 10

In order for a printer or a laptop to connect to a wireless LAN,it must have a ________.

A) WNIC
B) UTP
C) POP
D) VPN

Question 11

A ________ is used to provide seamless flow of data across networks.

A) layered protocol
B) point-to-point protocol
C) switch
D) UTP

Question 12

A(n)________ is a special-purpose computer that receives and transmits wired traffic on the LAN.

A) protocol
B) switch
C) domain
D) SOHO LAN

Question 13

A(n)________ is a set of rules that two communicating devices follow.

A) domain
B) attribute
C) protocol
D) database

Question 14

What is the protocol commonly used for wireless LAN?

A) IEEE 802.11g
B) EVDO
C) DSL
D) IEEE 802.3

Question 15

Which of the following is true of DSL modems?

A) DSL modems use television lines for data transmission.
B) Their signals do not interfere with voice telephone service.
C) DSL modems use the same protocols as cable modems.
D) DSL services and speed are standardized across applications.

Question 16

A ________ connects computers at different geographic locations.

A) LAN
B) WAN
C) VPN
D) PSDN

Question 17

Each device on the LAN has a hardware component called the ________ that connects the device's circuitry to the cable.

A) UTP
B) switch
C) NIC
D) POP

Question 18

Most LAN connections are made using ________ cables.

A) VPN
B) UTP
C) POP
D) PPP

Question 19

The computers in two separate company sites must be connected using a ________.

A) LAN
B) WAN
C) NIC
D) MAC

Question 20

Which of the following is true of an ISP?

A) It converts digital data in the user's computer to an analog signal.
B) It facilitates a one-way information transfer process between the user's computer and the Internet.
C) It have free access to the Internet.
D) It serves as a user's gateway to the Internet.

Question 21

Which of the following is true of Web servers?

A) They are not programs.
B) They run on a user tier computer.
C) They can manage items in a shopping cart.
D) They send and receive Web pages to and from clients.

Question 22

Which of the following purposes does an HTTP protocol serve?

A) flow among switches and access points
B) provide reliable internet transporting
C) enable communication among programs
D) conduct internet routing

Question 23

A ________ receives requests from users via the Web server,takes some action,and returns a response to the users via the Web server.

A) database server
B) commerce server
C) URL
D) Web farm

Question 24

Which of the following provides reliable internet transport?

A) HTTP
B) TCP
C) FTP
D) DSL

Question 25

________ is the most common language for defining the structure and layout of Web pages.

A) HTML
B) VPN
C) Flash
D) XML

Question 26

In the three-tier architecture arrangement,what is the second tier?

A) web tier
B) database tier
C) server tier
D) user tier

Question 27

A(n)________ is a unique name that is affiliated with a public IP address.

A) tag
B) protocol
C) domain name
D) assigned name

Question 28

The ________ is the Internet-based network of browsers and servers that process HTTP or HTTPS.

A) FTP
B) SMTP
C) Web
D) Data link

Question 29

One very common use of FTP is to ________.

A) maintain Web sites
B) transmit emails
C) format responses
D) implement protocol

Question 30

Most homes and small businesses use ________ because they receive more data than they transmit.

A) SDSL
B) ISDN
C) ADSL
D) PPP

Question 31

Which of the following is a component of the user tier?

A) computers that have browsers that request and process Web pages
B) computers that run Web servers and process application programs
C) computers that run a DBMS that processes SQL requests
D) computers that work to minimize customer delays in a facility called a Web farm

Question 32

The S in HTTPS stands for ________.

A) site
B) safety
C) society
D) secure

Question 33

What is an IP address?

A) It is a protocol that specifies the routing of the pieces of your data communication through the networks that comprise any internet (including the Internet).
B) It is a number that identifies a particular device.
C) It is a piece of a message that is handled by programs that implement IP.
D) It is a program that breaks your traffic up into pieces and sends each piece along its way.

Question 34

Which of the following is true of cable modems?

A) Cable modems provide high-speed data transmission using telephone cables.
B) Performance is stable in spite of the number of users sending and receiving data.
C) Cable modems generally use the same protocols as DSL modems.
D) The signals from cable modems do not interfere with TV signals.

Question 35

Narrowband lines typically have transmission speeds less than ________.

A) 256 kbps
B) 56 kbps
C) 126 kbps
D) 64 kbps

Question 36

Which of the following means an address on the internet?

A) FTP
B) DSL
C) URL
D) ISP

Question 37

What is a VPN?

A) It is a markup language that fixes several HTML deficiencies and is commonly used for program-to-program interaction over the Web.
B) It uses the Internet to create private point-to-point connections.
C) It is an add-on to browsers that was developed by Adobe and is useful for providing animation, movies, and other advanced graphics inside a browser.
D) It is the most common language for defining the structure and layout of Web pages.

Question 38

Businesses that need DSL lines that have the same receiving and transmitting speeds would use ________.

A) SDSL
B) ADSL
C) ISDN
D) PPP

Question 39

Which of the following is true of VPN?

A) VPN communications are secure even though they are transmitted over the public Internet.
B) One disadvantage of VPN is that it does not encrypt messages.
C) Remote access is difficult in case of VPN.
D) It is a virtual, private pathway over a public or shared network from the client to the server.

Question 40

When an individual uses the Internet,but not the Web,he or she is using ________.

A) FTP
B) HTTP
C) SOAP
D) XUP

Question 41

DSL operates on the same lines as voice telephones.

Question 42

Routers convert digital data into analog signals.

Question 43

Very few LAN connections are made using unshielded twisted pair (UTP)cable.

Question 44

Each wired computer or printer on the LAN has a network interface card (NIC).

Question 45

Leased lines are also called PSDN.

Question 46

WiMax has the lowest potential for speed,but it is the most easily available wireless protocol.

Question 47

File Transfer Protocol is used for email transmissions.

Question 48

Broadband lines have speeds less than 256 kbps.

Question 49

Bluetooth is a wireless protocol that can transmit data over long distances.

Question 50

With a WAN,an organization can place communications lines wherever it wants because all lines reside on its premises.

Question 51

An access point is a special purpose computer that receives and transmits wired traffic on the LAN.

Question 52

A protocol is a set of rules that two communicating devices follow.

Question 53

Most homes and small businesses do not use ADSL because they receive more data than they transmit.

Question 54

The IEEE 802.3 protocol is used for wired LAN connections.

Question 55

Asymmetrical digital subscriber lines meet performance level guarantees by offering the same fast speed in both directions.

Question 56

An HTTPS connection is a secure connection.

Question 57

The most popular protocol for WAN is the IEEE 802.3 protocol.

Question 58

Optical fiber cables carry light ray signals.

Question 59

Cable modems provide high speed data transmission using phone lines.

Question 60

A Local Area Network (LAN)would be used to connect computers located in Seattle and Philadelphia.

Question 61

What are the three tiers in the three-tier architecture?

Question 62

What is Bluetooth? What are its uses?

Question 63

What is the difference between a LAN and a WAN? Give an example of how each one could be used in business.

Question 64

Differentiate between private and public IP addresses.

Question 65

What is an NIC? Why is it important to LAN?

Question 66

Identify the differences between ADSL and SDSL.

Question 67

How does a wireless NIC work?

Question 68

What is a VPN and how does it work?

Question 69

What are cable modems?

Question 70

To ensure acceptable performance,commercial Web sites usually are supported by several or even many Web server computers in a facility called a Web farm.

Question 71

What is the difference between a web server and a commerce server?

Question 72

Name some common application layer protocols.

Question 73

A Virtual Private Network (VPN)is a type of LAN.

Question 74

What are the three important functions of an ISP?

Question 75

The server tier consists of computers that run a DBMS that processes SQL requests to retrieve and store data.

Question 76

What is a domain name? What is the procedure to get a domain name?

Question 77

What is the IP protocol architecture?

Question 78

A tunnel is a virtual,private pathway over a public or shared network from the VPN client to the VPN server.

Question 79

Explain Transmission Control Protocol (TCP).

Question 80

An access name is a unique name that is affiliated with a public IP address.