Chapter 1: Introducing Networks
1. Two computers connected by a wire cable form a network.
2. In 1954, the International Organization for Standardization (ISO) presented the Open Systems
Interconnection (OSI) model.
3. Computers must use a common protocol to communicate properly.
4. Peer communication allows error checking to occur on two separate layers simultaneously.
5. Many LANs and WANs contain several segments. Dividing a network into segments reduces
performance.
MULTIPLE CHOICE
1. The term ____ refers to the wire cabling, such as coaxial or the more commonly used twisted-pair, that
form the connections in most networks.
a.
media
c.
server
b.
EMI
d.
node
2. ____ networks have computers that are servers and computers that act as clients to those servers.
a.
EMI
c.
Peer-to-node
b.
Peer-to-peer
d.
Client/server
3. A ____ is contained within a company or department and located in a single geographic area, usually a
building or part of a building.
a.
WAN
c.
SAN
b.
LAN
d.
MAN
4. A ____ spans multiple geographic areas and is usually connected by common telecommunication
carriers.
a.
LAN
c.
WAN
b.
SAN
d.
MAN
5. The term ____ refers to the intermediate stage between a LAN and a WAN.
a.
SAN
c.
WAN
b.
LAN
d.
MAN
6. The term ____ refers to a series of storage devices, such as tapes, hard drives, and CDs, that are
networked together to provide very fast data storage for a network or subnetwork.
a.
MAN
c.
SAN
b.
WAN
d.
LAN
7. The part of the company’s network that allows access to nonemployees is called the ____, which is
accessed over or through the Internet.
a.
intranet
c.
publicnet
b.
extranet
d.
privatenet
8. The part of the company’s network that allows access to employees is called the ____, which is
completely separate from the Internet.
a.
intranet
c.
SAN
b.
LAN
d.
extranet
9. The seven layers of the OSI reference model communicate with one another via ____ communication.
a.
multicast
c.
peer
b.
logical
d.
unicast
10. The OSI model ____ layer defines the mechanical, electrical, and procedural events that occur during
the physical transmission of electronic signals on the wire.
a.
Physical
c.
Data Link
b.
Transport
d.
Network
11. The ____ is information that is used to determine whether data was corrupted during transmission.
a.
LLC
c.
MAC
b.
CRC
d.
RPC
12. The ____ sublayer of the Data Link layer defines how data is packaged for the network.
a.
MAC
c.
CRC
b.
RPC
d.
LLC
13. The ____ sublayer of the Data Link layer defines the media access method and provides a unique
identifier for the network card.
a.
MAC
c.
RPC
b.
LLC
d.
CRC
14. A(n) ____ address is a 48-bit address represented as a 12-digit hexadecimal number given to each
network card during production.
a.
CRC
c.
LLC
b.
RPC
d.
MAC
15. Because the MAC address is added during the manufacturing process, it is a permanent marking. For
this reason, the address is also known as a ____.
a.
NIC
c.
CRC
b.
BIA
d.
CSMA/CD
16. The protocols at the Network layer allow computers to route packets to remote networks using a ____
address.
a.
burned in
c.
logical
b.
BIA
d.
physical
17. ____ protocols, such as TCP, require an acknowledgment (ACK) of the receipt of data packets.
a.
Connectionless
c.
Application-layer
b.
SYN
d.
Connection-oriented
18. ____ protocols, such as User Datagram Protocol (UDP), do not require an ACK.
a.
Presentation-layer
c.
Connectionless
b.
Connection-oriented
d.
Network-layer
19. Data sent by a connectionless transport is called a ____.
a.
block
c.
cell
b.
datagram
d.
package
20. Each layer in a protocol stack may add a(n) ____ to the data as it is passed down the layers.
a.
PDU
c.
CRC
b.
MTU
d.
LLC
21. A(n) ____, which is also known as a header or a trailer, is specific information that is sent from one
layer on the source computer to the same layer on the destination computer.
a.
LLC
c.
PDU
b.
MTU
d.
CRC
COMPLETION
1. The term computer network, or simply ____________________, refers to the connection of two or
more computers by some type of medium.
2. In a client/server network, the ____________________ host the resources for the clients to use and
provide security.
3. A(n) ____________________ is a device that allows a computer or other device to connect to a
network through the media.
4. A(n) ____________________ is a network that uses a public communications infrastructure to
facilitate private communication between a company LAN and remote employees.
5. As the layers pass the data through the protocol stack, the addition of a header and/or trailer is called
____________________.
MATCHING
Match each item with a statement below:
a.
EMI
f.
Networking software
b.
Infrared
g.
Protocol
c.
Peer-to-peer network
h.
OSI model
d.
NOS
i.
Repeaters
e.
Networking hardware
1. term that describes all the physical components of a network
2. a defined method for communicating between systems
3. a wireless transmission media
4. devices that boost the network signal
5. allows communication, security, and distribution of data, files, and applications over a network
6. frequently caused by nearby motors or fluorescent lighting
7. the programs used to run a network
8. when every computer on a network acts as both a client and a server
9. developed as an industry standard for companies to use when developing network hardware and
software to ensure complete compatibility
SHORT ANSWER
1. Why do we use networks?
2. Describe various types of servers in a network.
3. What are virtual private networks?
4. What are the advantages of a layered networking model?
5. What are the responsibilities of the OSI model Physical layer?
6. What are the responsibilities of the OSI model Data Link layer?
7. What are the functions of the Network layer of the OSI model?
8. What are the responsibilities of the Transport layer of the OSI model?
9. What are the services provided by the Session layer of the OSI model?
10. What are the responsibilities of the Presentation layer of the OSI model?
