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By Root 1232 0

’t connect to the Internet, and he comes to you, his PC tech, for help. You figure out that it’s a DHCP problem. What program should you run to get him a new DHCP lease?

A. IPCONFIG

B. WINIPCFG

C. CONFIG

D. DHCP /RENEW

8. What command would you use to view the path taken by an Ethernet packet?

A. PING

B. IPCONFIG

C. TRACERT

D. NSLOOKUP

9. What type of network configuration has one machine configured to host data and services on the network for a number of other machines?

A. Client/Server

B. Peer-to-peer

C. Ethernet

D. Token Ring

10. Helga, the panicky intern, comes to your desk one day shouting that her Internet connection isn’t working. What is the first step you should take to help solve her problem?

A. Install a new NIC in her computer.

B. Reset her computer’s IP address.

C. Ask her to reboot her computer.

D. Verify the symptom of her networking problem.

Answers

1. C. A system must have a NIC to participate in any type of network.

2. C. PnP only requires the proper driver.

3. B. Each system can be 100 meters from the switch, so any two systems can be up to 200 meters apart.

4. D. 100BaseT requires CAT 5 rated cabling.

5. B. Joe needs a crossover cable to network two computers in his office using an Ethernet peer-to-peer connection.

6. D. The TIA/EIA has two standards for connecting the RJ-45 connector to the UTP cable: TIA/EIA 568A and TIA/EIA 568B.

7. A. You should run IPCONFIG to get a new DHCP lease for Steven’s Windows XP system. WINIPCFG was the program used by Windows 9x for this task. /RENEW is a valid switch for both programs, but not for CONFIG.

8. C. The TRACERT command traces the path a data packet takes to get to its destination.

9. A. A server hosts data and services on a network, and a client connects to a server.

10. D. You should first verify the symptom of her network problem. You can’t very well fix a problem if you don’t know what it is.

CHAPTER 24

Wireless Networking

In this chapter, you will learn how to

Discuss wireless networking components

Analyze and explain wireless networking standards

Install and configure wireless networks

Troubleshoot wireless networks

Wireless networks have been popular for many years now, but unlike wired networks, so much of how wireless works continues to elude people. Part of the problem might be that a simple wireless network is so inexpensive and easy to configure that most users and techs never really get into the hows of wireless. The chance to get away from all the cables and mess and just connect has a phenomenal appeal. Well, let’s change all that and dive deeply into wireless networking.

* * *

EXAM TIP The CompTIA A+ exams assume you know the names and connectors (or lack thereof) in wireless networking.

Historical/Conceptual

Wireless Networking Components

Instead of a physical set of wires running between network nodes, wireless networks use either radio waves or beams of infrared light to communicate with each other. Various kinds of wireless networking solutions have come and gone in the past. The wireless radio wave networks you’ll find yourself supporting these days are based on the IEEE 802.11 wireless Ethernet standard marketed as Wi-Fi and on Bluetooth technology. Wireless networks using infrared light are limited to those that use the Infrared Data Association (IrDA) protocol. Finally, the cell phone companies have gotten into the mix and offer access to the Internet through cellular networks with technologies such as EDGE and 3G.

Wireless networking capabilities of one form or another are built into many modern computing devices. Infrared transceiver ports have been standard issue on portable computers, PDAs, and high-end printers for years, although they’re absent from most of the latest PCs and portables. Figure 24-1 shows the infrared transceiver ports on an older laptop and PDA. Wireless Ethernet and often Bluetooth capabilities are now ubiquitous as integrated components, or you can easily add them by using USB, PCI,