Name: 
 

Ex4


True/False
Indicate whether the sentence or statement is true or false.
 

 1. 
RF (radio frequency) signals are sent to a transceiver with an antenna, then transmitted over the air waves to a transponder that transmits the signal to its destination.
 

 2. 
In terms of the communications network, the "host computer" and "server" perform similar functions and are basically synonymous terms.
 

 3. 
To connect your PC to the Internet over telephone wires, your computer must have a network interface card (NIC) plugged into its motherboard.
 

 4. 
Some communications systems send and receive data at an assigned clock rate, but most systems transmit data in an assigned number of bytes.
 

 5. 
The IP address of your computer is your e-mail address translated into a series of numbers.
 

 6. 
Static IP addresses retain their IP address only while they are connected to the Internet.
 

 7. 
A domain name is an easily identifiable label that corresponds to a numeric IP address.
 

 8. 
Although any individual or organization can select a domain name by registering it, some domain names are restricted.
 

 9. 
Examples of top-level domains, that are restricted to certain organizations, are edu, gov, mil, and int.
 

 10. 
When modems were first introduced, their speed was measured in band widths, but now it is measured as baud rate.
 

 11. 
A standard coaxial cable connects the Ethernet card on a computer's motherboard to the cable modem.
 

 12. 
TCP stands for Transfer Communications Protocol.
 

 13. 
A disadvantage of a network is its vulnerability to unauthorized access.
 

 14. 
Personal computers are mostly used to facilitate sharing data among computers.
 

 15. 
A LAN-jacking occurs when someone illegally authorizes data stored on a company’s network.
 

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 16. 
One of the key technologies used for the Internet is ____.
a.
Microwaves.
b.
Satellites.
c.
Lasers.
d.
Radio waves.
 

 17. 
A PC that is connected to a local area network is called a ____.
a.
Workstation.
b.
Laptop.
c.
Server.
d.
Host.
 

 18. 
The logical address of a network node ____.
a.
Is built into the device's circuitry.
b.
Refers to its layout.
c.
Is assigned when the physical address isn’t formatted to work with the network.
d.
Is its topology.
 

 19. 
Three common types of network topologies are ____.
a.
Star, bus, ring.
b.
Star, chain, circle.
c.
Host, server, router.
d.
Packet, parity, protocol.
 

 20. 
TCP/IP is the most commonly used network ____.
a.
Parity.
b.
Protocol.
c.
Packet.
d.
Physical topology.
 

 21. 
The Internet is an example of a ____ network.
a.
LAN.
b.
MAN.
c.
PNA.
d.
WAN.
 

 22. 
SMTP, or Simple Mail Transfer Protocol, transfers e-mail messages ____.
a.
From clients to servers.
b.
From servers to clients.
c.
From local to remote computers.
d.
From server to server.
 

 23. 
A permanently assigned IP address is called a ____ address.
a.
Dynamic
b.
Domain name
c.
Static
d.
Top-level
 

 24. 
Dial-up connections use a ____ to translate digital signals into analog audio tones.
a.
Voice band modem.
b.
Modulated modem.
c.
Demodulated modem.
d.
Circuit switch.
 
 
ex4_files/i0270000.jpg
 

 25. 
The item numbered 4 in the above figure represents the ____.
a.
Transmitting modem.
b.
Receiving modem.
c.
Server.
d.
Modulator.
 

 26. 
The network device that connects several nodes of a LAN is called a ____.
a.
Trunk.
b.
Head-end.
c.
Hub.
d.
Server.
 

 27. 
Radio waves are sent and received by a ____.
a.
Transponder.
b.
Transmitter.
c.
Transfer protocol.
d.
Transceiver.
 

 28. 
STP and UTP refer to types of ____.
a.
Cables.
b.
Protocols.
c.
Servers.
d.
Modems.
 

 29. 
Today, most cable companies use ____ compliant cable modems that secure your computer from your neighbors.
a.
CATV
b.
DOCSIS
c.
LAN
d.
DSL
 

 30. 
The difference between a Home PLC and HomePNA network is:
a.
Home PLC requires cables.
b.
HomePNA uses outlets.
c.
HomePNA uses telephone wiring.
d.
They are the same thing.
 

Completion
Complete each sentence or statement.
 

 31. 
A personal home computer that is connected to the Internet is usually referred to as a(n) ____________________.
 

 

 32. 
A(n) ____________________ address is one that is built into the circuitry of a network device.
 

 

 33. 
Each packet that is transmitted over a circuit contains a destination ____________________.
 

 

 34. 
Simplex, Half duplex, and Full duplex are characteristics of ____________________ that determine the directions of the flow of data.
 

 

 35. 
An extranet is similar to an intranet network, but offers private, external ____________________ access.
 

 

 36. 
Domain names indicate the name of the host computer or ____________________.
 

 

 37. 
The ".com" portion of the URL "emily@course.com" is the ____________________.
 

 

 38. 
Although modem speed was originally measured as baud rate, now it is measured in ____________________ per second.
 

 

 39. 
Satellites transmit television signals and data signals to a satellite dish farm called the ____________________.
 

 

 40. 
A network device that amplifies a signal so it retains enough power to reach its destination is called a(n) ____________________.
 

 

 41. 
Ethernet networks are a leading example of _________ technology.
 

 

 42. 
________________ occurs when hackers search for Wi-Fi signals coming from homes or businesses and use the signals to gain network access.
 

 

 43. 
The range of network coverage in a public Wi-Fi network is called a _____________.
 

 

 44. 
____________ is a short-range wireless network technology that makes its own connections between devices such as printers and keyboards.
 

 

 45. 
______________ is an alternative Internet protocol to POP.
 

 

Matching
 
 
Match the following network devices with their descriptions below.
a.
Gateway.
b.
Modem.
c.
Hub.
d.
Router.
e.
Repeater.
f.
Server.
g.
Network interface card.
h.
Client.
 

 46. 
A computer, connected to a network, that distributes resources to users.
 

 47. 
Connects several nodes in a local area network.
 
 
Match the following network terms with their descriptions below.
a.
Physical topology.
b.
Logical topology.
c.
Packet.
d.
Protocol.
e.
Parity bit.
f.
Handshaking.
 

 48. 
The way that messages are actually transmitted between nodes.
 

 49. 
A small amount of data that contains a sequence number and addresses.