Study Lab for Chapter 21

Use the "Key Terms and Definitions" section of the lab to review terms used in this chapter. Try the "Practice Test" to check your comprehension of the chapter. Tackle the "Lab Exercises" to apply your knowledge.

Key Terms and Definitions

10Base2

Thinnet; low-cost version of 10Mbps Ethernet based on RG-58 cables and T-adapters.

10Base5

Thicknet; original version of 10Mbps Ethernet.

10BaseT

10Mbps Ethernet based on UTP cable.

100BaseTX

100Mbps Ethernet based on UTP cable. Also called Fast Ethernet.

802.11a

54Mbps Wireless Ethernet (5GHz frequency).

802.11b

11Mbps Wireless Ethernet (2.4GHz frequency).

802.11g

54Mbps Wireless Ethernet (2.4GHz frequency).

1000BaseTX

1000Mbps Ethernet based on UTP cable. Also called Gigabit Ethernet.

ActiveX

Microsoft technology used by many Web sites for active content. Web content zones and security settings control how ActiveX controls are handled by a particular computer.

AppleTalk

Apple's native low-speed network protocol. AppleTalk printers can be used by Windows NT 4.0 and 2000.

Basic Rate Interface

64Kbps ISDN connection. A 128Kbps ISDN connection uses two BRI channels.

Bluetooth

A short-range wireless network that also supports electronic as well as computer devices.

BNC (Bayonet Neill-Concelman)

A barrel-shaped network cable connector used by RG-8, RG-59, and RG-58 network cables.

bridge

Connects two networks that use the same protocol, such as Fast Ethernet and Wireless Ethernet.

bus

Network topology in which all stations share a single wire connection. Used by 10Base2 and 10Base5 Ethernet and HomePNA networks.

cable Internet

A broadband Internet connection that uses the cable TV line.

cable modem

The tuner used to pick up cable Internet signals.

Category 5

The most common type of UTP cable in recent Ethernet installations. Supports 10BaseT, Fast, and Gigabit Ethernet speeds.

client

A PC that uses a server's shared resources.

client/server

Network model in which specialized servers provide shared resources and network management services to client PCs.

coaxial

Single-wire cable protected by metal mesh shielding. Used by early versions of Ethernet and for cable and satellite TV/Internet connections.

DHCP (Dynamic Host Configuration Protocol)

A DHCP server provides server-assigned IP addresses to connected devices.

dial-up networking

Networking software used by Windows NT 4.0/9x/Me for analog modems.

DirecWAY

A major satellite Internet provider. DirecWAY is available under several brand names .

domain name

Name used as an alias for an IP address.

domain name system ( DNS )

System for translating between domain names and IP addresses.

DSL (Digital Subscriber Line)

Broadband Internet access provided through high-quality phone lines at speeds similar to cable modems.

email

Electronic mail.

Ethernet

General name for networks based on Carrier Sense Multiple Access/Collision Detect (CSMA/CD) transmission of data. IEEE-802.3 standard.

Fast Ethernet

Another name for 100Mbps Ethernet.

file and printer sharing

Optional Windows feature that enables a computer to share folders, drives , and printers with other computers over the network.

File Transfer Protocol ( FTP )

Protocol used for file transfers to and from the Internet.

firewall

Program or device that blocks unauthorized access to a computer.

fixed wireless

Broadband Internet service that uses microwave line-of-sight transmission.

FQDN (fully qualified domain name)

A way of referring to servers on a TCP/IP network: Name-of-server.name-of-domain.root-domain .

full access

Network access that enables other computers to read/write/change/delete files.

full-duplex

Network adapter setting permitting simultaneous sending and receiving of data; doubles throughput.

gateway

A device that connects one network to another. A router acts as a gateway.

Gigabit Ethernet

Another name for 1000Mbps Ethernet.

half-duplex

Default network adapter setting in which sending and receiving is performed in separate operations.

HomePNA

A phone linebased bus-topology network.

HTTP (Hypertext Transport Protocol)

The protocol used by Web browsers.

https ://

Indicates a secure Web site.

hub

Simplest central connecting device used by 10BaseT and faster Ethernet versions. Hubs subdivide the bandwidth and broadcast data to all stations.

Hypertext Markup Language ( HTML )

Native language of Web pages. Uses tagged text.

Internet

The network of networks; a worldwide network of computers running TCP/IP.

Internet access device

General term for any broadband device used instead of a dial-up modem.

Internet Options

Control Panel icon and Internet Explorer menu option used to control the behavior of Internet Explorer.

Internet service provider ( ISP )

Company that provides Internet access.

IPConfig

Command-line utility (Windows NT 4.0/2000/XP) that displays IP configuration and can be used to release and renew a server-assigned IP address.

IPX/SPX

Novell's native network protocol through NetWare 4.x. Now replaced by TCP/IP. It is also called NWLink.

ISDN (Integrated Services Digital Network)

Broadband Internet access that also supports telephone and fax machines. Largely replaced by DSL.

Java

Cross-platform computer language that is used by many Web sites for active content. Web content zones and security settings control how ActiveX controls are handled by a particular computer.

LAN (local area network)

A network located in an office or building.

mapped drive

Network folder that is referred to with a local drive letter.

MAU (media access unit)

The device used in token-ring networks to connect computers to each other.

microfilters

Small filters used on telephones and similar devices to prevent interference with a DSL connection.

multi-mode

A type of fiber- optic cable used for short-distance runs.

Net

Command-line utility that can be used to perform various network and diagnostic tasks .

NetBEUI

A non-routeable network protocol that is simple to use. An enhanced version of NetBIOS.

NetBIOS

A non-routeable network protocol now replaced by NetBEUI.

network client

Computer that uses another computer's shared resources.

network operating system ( NOS )

An operating system built specifically for networking, such as Novell NetWare or Windows NT/2000/Server 2003.

network topology

Logical/physical layout of the network.

NSLookup

Command-line utility (Windows NT 4.0/2000/XP) that displays DNS servers and DNS information for a specified IP address or server.

offline content

Content originally located on a remote server that's now stored on a local hard disk.

one-way service

Broadband Internet service that uses a telephone line for uploads. Older cable modems, DirecPC ( ancestor of DirecWAY), and some fixed wireless services are one-way.

peer-to-peer

Network model in which client PCs share resources with each other.

Ping

Command-line utility that tests and checks connection speed to a particular server or IP address.

plenum

Special network cable designed for use in air vents and suspended ceilings. Gives off less smoke and fewer toxic fumes when burned than ordinary network cable.

PPPoE (point-to-point protocol over Ethernet)

A protocol used on many DSL connections that requires the user to log in with a username and password.

Primary Rate Interface

1.536Mbps ISDN connection used mostly by large businesses.

protocol

Rules that define telecommunications connections between devices. TCP/IP is a family of related protocols.

proxy server

A device that checks Internet data requested by a computer and filters out unapproved content or viruses before passing it to the recipient.

read-only access

Network access that enables other computers to read but not change files.

Release

Frees up an IP address provided by a DHCP server.

Renew

Obtains a new IP address provided by a DHCP server.

repeater

Increases range of a network connection.

ring

Network topology in which each station is connected to two other stations and data flows in a single direction. Token ring uses this topology.

RJ-11

Connector used by telephones, dial-up (analog) modems, and HomePNA connections. Smaller than RJ-45.

RJ-45

Connector used by 10BaseT and faster Ethernet connections, DSL and ISDN broadband Internet, and by newer token-ring connections.

router

Network device that connects one network with another and routes data between the networks.

satellite Internet

Broadband Internet that uses geosynchronous satellites to send and receive data.

Secure Socket Layers ( SSL )

Encryption/security system used by secure (https) Web sites.

server

Specialized computer that shares resources with client PCs. Often features high-speed and redundant hardware for extra reliability. A peer server is also a client on a peer-to-peer network.

server-assigned IP address

An IP address provided by a DHCP server. Might vary from session to session. Also called a dynamic IP address.

shared folder

A folder that can be accessed by other computers over the network.

simple file sharing

Standard network configuration for Windows XP; disables user/ group access control. Can be disabled to improve security.

single-mode

A type of fiber-optic cable used for long-distance runs.

SSID (Service Set Identifier)

Identifies a particular Wireless Ethernet network.

star

Network topology in which each station connects to a central distribution device such as a hub, switch, or wireless access point. 10BaseT, 100BaseT, 1000BaseT Ethernet, and Wireless Ethernet in infrastructure mode use this topology.

Starband

A major satellite Internet provider.

static IP address

An IP address set in the TCP/IP properties sheet for a network or dial-up adapter.

STP ( shielded twisted pair cable)

Used by token-ring networks.

switch

A more complex central connecting device used by 10BaseT and faster Ethernet versions. Switches create one-to-one connections between sender and receiver and support full bandwidth to all stations.

TCP/IP (Transmission Control Protocol/Internet Protocol)

The protocol used by the Internet is also the leading network protocol.

Telnet

Enables remote control of a PC via TCP/IP.

terminal adapter

ISDN network device.

Thicknet

Another name for 10Base5 Ethernet.

Thinnet

Another name for 10Base2 Ethernet.

token ring

A network based on IEEE-802.5 standards. Uses a logical ring topology.

Tracert

Command-line utility that checks the path used to transfer data between a computer and a specified server or IP address.

Transceiver Type

An option on combo network adapters that determines which connection is used for network data.

two-way service

Broadband Internet service that uses the connection for downloading and uploading.

UNC (Universal Naming Convention)

A method for indicating the path to a shared resource: // servername /sharename/foldername/filename.ext .

unshielded twisted pair ( UTP )

Eight-wire (four-pair) cable used by 10BaseT and faster versions of Ethernet.

WAN (wide area network)

A network in multiple locations connected together by leased lines or satellite transmissions.

WBR (wireless broadband router)

The device that receives fixed wireless signals from the antenna.

Web browser

A program that can read and interpret HTML and other types of text and script content on Web sites. Internet Explorer is the Web browser included in Microsoft Windows.

Web content zone

Internet Explorer security feature that permits user to classify different Web sites and IP addresses by the security settings appropriate for safe access.

WEP (Wireless Equivalent Privacy)

Original security standard for Wireless Ethernet.

Wi-Fi

Wireless Ethernet (802.11a, b, or g) hardware that has been certified for interoperability across brands.

Winipcfg

Windows 9x/Me utility that displays IP configuration and can be used to release and renew a server-assigned IP address.

WINS (Windows Internet Naming Service)

A feature of some Microsoft networks that translates between NetBIOS computer names and IP addresses.

Wireless Ethernet

802.11-family wireless networking.

WPA (Wi-Fi Protected Access)

A much stronger security standard than WEP, but not supported by all hardware.

Practice Test

1:	Your client has an analog modem and wants to connect to the Internet. Which type of network configuration needs to be performed on the system? DSL Dial-up networking Cable modem NetBEUI
2:	Your client has installed a DSL Internet connection that is not working. When you arrive at the site, you determine that interference from the telephones is causing the DSL connection to go down. Which of the following needs to be installed? Splitter RJ-11 cable Microfilter Router
3:	Your client needs high-speed Internet access but is about 100 miles from the nearest city. Which of the following broadband solutions should you recommend? Cable modem DSL Wi-Fi Satellite
4:	Your client needs to transfer information to a Web site under development for testing. Which of the following standard Windows tools can be used for this purpose? FTP Telnet Winipcfg Ping
5:	Your client already has a 10/100 Ethernet network but needs to add a station that is over 100 meters from the switch. Which of the following components can be added to the network to enable the new station to connect to the network? Router Bridge Switch Wireless access point
6:	If you need to configure a TCP/IP network with a static IP address, which of the following also needs to be configured? (Choose all that apply) Gateway DNS server DHCP server Shared folder
7:	You need to retrieve a document called FY2004.xls stored on a server called Workgroup in a share called Q in a folder shared as Budget_Docs . Which of the following is the correct UNC path to the document? \\FY2004.xls\Q\Workgroup\Budget_Docs www.workgroup.com/Budget_Docs/Q/FY2004.xls \\Workgroup\Q\Budget_Docs\FY2004.xls ftp.budget_docs.com/Q/FY2004.xls/Workgroup
8:	Your client is running Windows XP and has specified a shared folder. However, other users can't access the folder. Which of the following is the most likely cause? File and Printer Sharing is not installed. The firewall is disabled. The firewall is enabled. File and Printer Sharing is not installed on other computers.
9:	A computer running Windows 2000 has TCP/IP installed but its network cable was unplugged. After plugging in the network cable, the network is not available. Which of the following commands should be used to enable the system to connect to the network? Net Use Winipcfg Ping IPConfig
10:	Your client's Wireless Ethernet network is being hacked by unauthorized users. Which of the following should be enabled to secure the network? DNS WPA DHCP Telnet

Lab Exercises

Required equipment : two computers with 10/100 Ethernet network adapters (add-on card or built-in); UTP network cables and hub or switch; Wi-Fi network adapters and wireless access point can be substituted; router; broadband or dial-up Internet connection

Dial-Up Connection Detective

Objective : Determine the properties of the dial-up Internet connection.

1. Open the DUN folder or Network folder (depending upon the version of Windows).

2. Right-click the network connection icon and select Properties.

3. What telephone number is used to make the connection? What is the username? What is the password?

TCP/IP Configuration Detective

Objective : Determine the properties of the TCP/IP configuration.

1. Determine which version of Windows is in use.

2. If Windows 9x/Me, run Winipcfg . If Windows NT 4.0/2000/XP, use IPConfig .

3. What is the computer's IP address? The gateway's IP address? The DNS servers' IP addresses?

4. If you use Wireless Ethernet (Wi-Fi) hardware, also determine the network's SSID, the channel, and whether WEP or WPA security is enabled.

TCP/IP Troubleshooter

Objective : Use various troubleshooting tools.

1. Open a command prompt and Ping the gateway's IP address or the other computer's IP address if a gateway is not available. How fast is the response?

2. Disconnect the network cable from one of the computers or shut off one of the computers (if wireless) and Ping the IP address for the computer that has been shut down/disconnected. What error message do you see?

3. If you have a LAN or broadband Internet connection, use Tracert to determine the path to your favorite Web site. How many hops does it take?

4. Repeat step 3, but specify a Web site for a local company. How many hops does it take?

5. If you have Windows XP, open the Network Connections folder (it's the other view of My Network Places) and click Network Troubleshooter. Click Diagnose Network Configuration and try the tests.

Answers to Practice Test

A1:	Answer B (dial-up networking) is the right choice to make here.
A2:	Answer C (microfilter) is the gadget you want.
A3:	Answer D (satellite) is the only way to go in the countryside.
A4:	Answer A ( FTP ) is the one you want.
A5:	Answer C (switch) will do the job.
A6:	Answers A (gateway) and B (DNS server) need to be configured.
A7:	Answer C ( \\Workgroup\Budget_Docs\FY2004.xls ) is the UNC path to follow.
A8:	Answer C (the firewall is enabled) is the most likely cause.
A9:	Answer D ( IPConfig ) has options to release and renew the IP address.
A10:	Answer B (WPA) stops hackers in their tracks.