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gazecummingNetworking and Communications

Oct 26, 2013 (3 years and 9 months ago)

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CHAPTER
9

REVIEWING THE BASICS

1.

Explain how a single physical computer can be a Web server and an email server at the
same time.

Server functions can be controlled by software, and a single physical computer can be running
more than one type of server sof
tware simultaneously. Programs on client PCs access the
different servers running on the same machine through the use of port numbers assigned to the
different server types.

2.

What Windows XP component can be used to share an Internet connection with other
c
omputers on the LAN?

Internet Connection Sharing

3.

What protocol is commonly used to manage the connection between a broadband modem
and a PC when the connection requires a username and password and is not always up?

PPPoE

4.

Give the service and protocol for

the following ports: port 21, port 25, port 80, and port
110.

Port 21 is used for FTP (using FTP); port 25 is used for sending e
-
mail (using SMTP); port 80 is
used for Web browsers and the World Wide Web (using HTTP); and port 110 is used for
receiving e
-
mail (using POP3).






5.

Which protocol used by Web browsers and Web servers is responsible for guaranteeing
delivery? For breaking data into packets? For decrypting and decompressing data as
necessary?

TCP, IP, HTTP

6.

Explain the difference between a conne
ction
-
oriented protocol and a connectionless
protocol, and give an example of each.

A connection
-
oriented protocol such as TCP establishes a session before sending data. A
connectionless protocol such as UDP sends data without establishing a session first
, and without
being concerned with whether the data is received.

7.

What TCP/IP utility would you use to display the route taken over the Internet by a
communication between a Web browser and Web server?

Tracert

8.

What utility would you use to display informat
ion about the name space kept by a DNS
server for a particular domain name?

NSLookup









9.

Explain the functions of the following TCP/IP utilities: NSLookup, Winipcfg, Ipconfig,
and Microsoft SNMP Agent.

NSLookup

Requests information about domain name
resolutions from the DNS server’s zone
data

Winipcfg

Displays IP address and other configuration information in a user
-
friendly window
(not available under Windows NT/2000/XP)

Ipconfig

Displays the IP address of the host and other configuration information

Microsoft SNMP Agent

Provides system management for networks; allows a system manager
to monitor connections to computers running Windows 98 with SNMP Agent

10.

What is the full command line to use Ipconfig to release the current IP address?

IPconfig /releas
e

11.

What utility new to Windows XP can be used to display a NIC’s MAC address?

Getmac

12.

Place these stages of creating a dial
-
up networking connection in Windows 9x/Me in the
correct order: creating a connection, verifying installation of the dial
-
up adapter,

installing the Dial
-
up Networking feature, entering configuration information for your
ISP.

Install the Dial
-
up Networking feature, verify installation of the dial
-
up adapter, create a
connection, and enter configuration information for your ISP.




13.

Expl
ain at least four things you can try if you cannot make a connection to the Internet
using a dial
-
up networking connection.



Check the user ID, password, and dial
-
up networking icon for errors.



Try dialing the number manually from a phone, or try another n
umber.



Check Device Manager for reported errors about the modem.



Print out and compare the Modemlog or PPPlog text files for the unsuccessful connection
attempt with a successful connection on another computer.



Verify that all components are installed, an
d try removing and then reinstalling them.



Reboot the PC and try again.

14.

Label the component parts of this URL:
http://www.companyabc.com/Reports/december2004.doc

HTTP is the protocol,
www

is the host name,
companyabc.com

is the name of the network,
www.companyabc.com

is the fully qualified domain name, Reports is the folder where the
requested file is located, and december2001.doc is the name of the requested file.

15.

Give the type of organization that would use the fo
llowing top
-
level domains: .mil, .net,
.air, .com, .org, .gov.

.mil

Military

.net

Internet provider or network

.air

Aviation industry

.com

Commercial institution

.org

Nonprofit organization

.gov

Government institution



16.

What are three things you can do t
o improve slow browser performance?

Delete temporary Internet files, clear the history of recently visited Web sites, and reduce the
number of days that IE keeps pages in history. You can also suppress downloading images, and
close unwanted applications a
nd services.

17.

What protocol is used for sending email? For receiving it?

SMTP or SMTP AUTH is used for sending e
-
mail, and POP or IMAP is used for receiving it.

18.

Explain what FTP is used for.

FTP (File T
ransfer Protocol) is used to transfer files over a ne
twork. The two computers involved
in the transfer do not have to be using the same operating system. FTP can be initiated from a
command prompt or from FTP software.

19.

What is the listening port for Windows XP Remote Desktop?

3389

20.

Explain the difference when

a user sees http:// in a browser address box and when the
user sees https:// in the address box.

Https indicates the data passed from the user to the Web site will be encrypted. Http data is not
encrypted.

21.

Internet Explorer is the most popular browser. Wh
at is one security reason a user might
ch
o
ose to use a different browser such as Firefox by Monzilla?

Writers of malicious software can target Windows through Internet Explorer. Using Firefox or
another browser might help evade an attack.



22.

When an ISP giv
es a user the two mail server addresses, smtp.myISP.net and
pop.myISP.net, which address should be used for incoming mail and which should be
used for outgoing mail?

For incoming mail, use smtp.myISP.net
.


For outgoing mail, use pop.myISP.net
.

23.

When using
a cable modem to connect to the Internet, the data transmission shares the
cabling with what other technology?

Television

24.

What is the FTP command to close an FTP session?

BYE

25.

Does it matter which TV jack in your house should be used by your cable modem? Wh
y
or why not?

Yes. Use the TV jack that comes directly from the street service so no splitter inside your house
can degrade the signal.

26.

What two methods can an ISP use to assign your computer or router an IP address?

Dynamic or static IP addressing

27.

When is

it appropriate to delete the C:
\
Documents and Settings
\
user name
\
Local
Settings
\
Temporary Internet Files folder?

To delete a corrupted IE cache so that IE can build a new cache

28.

What device is required so that you can connect a regular telephone to a VoIP
network?

An ATA (analog telephone adapter)


29.

Why is it necessary for your home or office computer to have a static IP address if it is to
be set up for Remote Desktop?

Remote Desktop needs the IP address to locate your computer.

30.

Give two examples of broadba
nd technology.

Possible answers: Cable modem and DSL