IT 2 Module 2: Introduction to NOS Networking
Online Study Questions
Name:_______Chi Vang______________
Curr
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Questions
Benefits of Networking
What was the driving force behind the
development of computer networks?
What is print sharing?
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What are the benefits of print sharing?
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What is the single most widely used
benefit of computer networks?
What type of application is Email?
What identifying information is included
in an email?
Where does the email server send
messages for a user when the user’s email
messages are received?
True or false, the storage and retrieval
nature of email systems requires that the
recipient be connected when email is
received for them.
What are the three advantages of
Directory and name services?
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How do private networks connect to the
Internet?
What issues are the responsibilities of a
Network administrator?
What does it mean for a network
administrator to do a “cost-benefit
analysis”?
Who is responsible for setting up new
user accounts and services to the
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Answers
Share the valuable information
Development of networks enabled
multiple computers to connect together
in order to share files
Multiple users could all share one
printer
Enable the sharing of expensive devices
Storage-and-retrieval
Sender, receiver, and time-stamp
User’s post office box
False
A standardized means of naming
and locating resources on a
network
 Text names are easier to
remember than numeric
addresses
 Network resources are not
bound to a physical location
Internet Service Providers

Range from setting up new user
accounts and services to the
monitoring of network performance
and the repair of network failures
Benefits against the issues, costs, and
problems
User Administrator
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monitoring of network performance and
the repair of network failures?
Types of Networks
What is a LAN designed to do?
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What is a WAN designed to do?
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What is a Star topology?
What is a Ring topology?
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What is a Bus topology?
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What is a Star topology?
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What topology do most LAN’s use today?
What is the definition of the “Medium”?
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Name three types of that computers use
to communicate:
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What are the rules for coordinating the
use of the medium called?
How many computers can use the
medium at one time?
What type of network is used over long
distances?
What type of communication is used to
create a WAN?
Why is a serial communication line called
Point to Point?
How does a serial communication line
work?
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Who is a “Common Carrier”?
How is a temporary WAN connection
made?
How can a company have an “always on”
connection?
Which is typically faster, a “always on” or
dialup connection?
What special devices do computers need
to connect over a Wan?
What does a CSU/DSU do?
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Connect many computers in a relatively
small geographical area such as a home,
an office, a building, or a campus
Is usually segmented into multiple LANs
that make up a WAN
Connect to a central point, or a hub
Is a network topology in which each
node connects to exactly two other
nodes, forming a single continuous
pathway for signals through each node
The topology of a network whose
components are connected by a busbar
A network whose components are
connected to a hub
Star topology
A means or instrumentality for storing
or communicating information
The Internet, the intranet, and the
extranet
Media access
6 different location of place
WANs
Telephone and dialup
Because they connect only two devices,
one on each side of the line
The bits of information are transmitted
one after another in a series, like cars
traveling on a single lane highway
Telephone company
Using a telephone with a dialup line
Can rent a permanent line or circuit
from the common carrier.
Dialup connection
Channel Service Unit/Data Service Unit
(CSU/DSU)
This is the connection point where the
user’s data coming from the computer
or network interfaces with the WAN
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Which operates faster a WAN or LAN?
What protocol do two computers
typically use to communicate in a Peerto-Peer network?
In the request/response protocol what is
the requestor called?
In the request/response protocol what is
the responder called?
In a peer to peer network, the networked
computers act as ______ partners.
As peers, what roles or functions can a
computer take on?
What determines if a computer is a client
or a server in a peer to peer network?
In a peer to peer network, who controls
the resources on the network?
Who is responsible for backing up the
data on a peer to peer network?
Peer to peer networks work well with
how many computers?
What are some advantages of Peer to
peer networks?
What are some disadvantages of Peer to
peer networks?
What are some advantages of
Client/Server networks?
What is a disadvantages of Client/Server
networks?
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Networking Protocols
What is a Protocol Suite?
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What is a Protocol?
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connection
LAN
LAN and WAN
Client
Server
Equal
The client function or the server
function.
At one time, computer A, for example,
may make a request for a file from
computer B, which responds by serving
the file to computer A. Computer A
functions as client, while B functions as
the server. At a later time, computers A
and B can reverse roles. B, as client,
makes a request of A, and A, as server,
responds to the request from B. A and B
stand in a reciprocal or peer
relationship to each other.
Individual users
Their self
10 or fewer
Their efficiency decreases rapidly as the
number of computers on the network
increases.
Security may be difficult to maintain
To overcome the limitations of the peerto-peer network model
Lacks the robustness of a good P2P
network
When a set of protocols operates in a
coordinated way to deliver a number of
functions
Controlled sequence of messages
exchanged between two or more
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What is the most popular internet
protocol?
Who defined the TCP/IP suite of
protocols?
Name four application protocols:
What does the Telnet protocol allow you
to do?
What does the SMTP protocol allow you
to do?
What does the DNSP protocol allow you
to do?
Name two Transport protocols:
What facilities does the TCP protocol
provide?
What applications use the TCP protocol?
How does TCP identify the application
using it?
Which Transport Protocol is connection
oriented?
Which Transport Protocol is
connectionless oriented?
What applications use the UDP protocol?
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Which Transport Protocol can tolerate a
level of data loss?
Which Internet Protocol provides source
and destination addressing?
Which Internet Protocol is used for
network testing and troubleshooting?
The Ping application uses what messages
to test remote devices?
Which Internet Protocol uses hop count
to choose routes?
Which Internet Protocol uses
characteristics of the links between
networks like bandwidth and delay?
Which Internet Protocol is used to
discover the local MAC address of a
station when its IP address is known.
What is Open Source software?
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Who is the leader in the open source
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systems to accomplish a given task
TCP/IP
United States of Defense
Telnet
File Transfer Protocol
Simple Mail Transport Protocol
Domain Name System
Access to local or remote systems
Supports most Internet e-mail programs
Greatly simplifies network usage by end
users
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
End-to-end connection
E-mail, web browsing, file transfer
Port number
TCP
UDP
Network management, network file
system, and simple file transport
TCP
UDP
Internet Control Message Protocol
(ICMP)
Internet Protocol (IP)
Routing Information Protocol (RIP)
Open Shortest Path First (OSPF)
Address Resolution Protocol (ARP)
Free and users are not bound to the
copyright laws that might be broken
when using proprietary software
The creator/maker
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arena?
What are the advantages of Open Source
software?
What are the disadvantages of Open
Source software?
What are the advantages of Proprietary
software?
What are the disadvantages of
Proprietary software?
Is Microsoft software, open source or
proprietary software?
LAN Architectures
What access control method does the
802.3 standard use?
What does the CD stand for in CSMA/CD?
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How does CSMA/CD work?
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What type of topology does 10Base-T
use?
What type of cable is generally used in
10Base-T architecture?
What type of cable is used to connect two
computers directly without a hub?
What is the most commonly used twisted
pair cabling?
What are the advantages of UTP cabling?
What are two disadvantages of UTP
cabling?
What is the transfer rate of 100Base-X?
What three types of cable can be used to
implement 100Base-X?
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linux
More effort by independent sources
More organized source and
development
Slower, limited evolution
Both
LAN
Carrier Sense Multiple Access/Collision
Detection
Multiple stations will have access to the
media, and before one station can
access that media, it must first listen
(carrier sense) to detect if another
system is using the same media. If
another system is using the media, then
that system must wait before it can
transmit. If both systems attempt to
send data at the same time, then a
collision will result
Star bus
Unshielded Twisted-Pair (UTP) cable
Twisted
UTP
Flexible
Maximum length
100mps
5UTP
5STP
2strand fiber optic cable
Cheap
Inherent twisted pair
What are the advantages of 100Base-X?
What are the disadvantages of 100BaseX?
What is another name for 1000Base-T?
Gigabit Ethernet
What are the advantages of 1000Base-X? Performance, big bandwidth
What are the disadvantages of 1000Base- Expensive
X?
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Explain how half duplex works:
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Explain how full duplex works:
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Can hubs support full duplex?
Can switches support full duplex?
What does “DSL is an always-on
technology”?
List five types of DSL service:
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What is the most commonly used type of
DSL?
What does Upstream refer to?
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What does Downstream refer to?
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What does ADSL use to create multiple
channels?
What is a benefit of ADSL’s ability to
support multiple channels?
What is a cable modem used for?
What are some disadvantages of DSL?
Which service has the fastest upload
speed? ISDN, DSL or Cable modem
service?
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Allows for only one direction that can
be used at a time when data is being
transmitted over the lines
Data can be sent and received at the
same time
Yes
Yes
No need to dial up each time when
connecting to the Internet
Asymmetric DSL (ADSL)
Very High Data Rate DSL (VDSL)
High Data Rate DSL (HDSL)
Symmetric DSL (SDSL)
ISDN DSL (IDSL)
ADSL
Transferring data from the end user to
the server
Process of transferring data from the
server to the end user
Frequency-division multiplexing (FDM)
Surfing the Internet while at the same
time using the telephone to call a friend
Provide Internet access only
One connection
Cable modem
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