Networking hands-on exercises

Hands-On Project 1-3: Viewing Network – Page 20 in the book – Guide to Networking Essentials 7th Edition by Greg Tomsho.

Software Layers

Time Required: 10 minutes

Objective: View the properties of your computer’s network connection and
identify the layers of the network communication process.

Required Tools and Equipment: Net-XX

Description: In this project, you view the properties of your computer’s local area connection
and identify the layers of the network communication process. Each network connection in
Windows contains the software responsible for the steps of the network communication

  1. Start your computer, and log on as NetAdmin.
  2. Open the Network Connections dialog box by right-clicking Start and clicking Network
  3. Right-click Ethernet0 and click Properties to open the Ethernet0 Properties dialog box
    (see Figure 1-8).
  4. The “Connect using” text box displays the NIC. In the list box under it, you see several
    items. Client for Microsoft Networks, File and Printer Sharing for Microsoft Networks,
    and Internet Protocol Version 4 are the items you’re most interested in right now, as
    they’re the most necessary software components to make network communication work.
  5. Assume a user is running a word-processing program and saves a file to a Windows
    server. Use the information you learned in this chapter to write which of the four layers
    of the network communication process each component corresponds to. Note that some
    layers can be used more than once. Table 1-3 has a description of the layers of network communication. Table 1-4 on page 20 shows examples of these layers. Figure 1-6 shows a visual representation.

• Word-processing program: User Application
• NIC displayed in the “Connect using” text box: Network Interface
• Client for Microsoft Networks: Network Software
• File and Printer Sharing for Microsoft Networks: Network Software
• Internet Protocol Version 4 (TCP/IPv4): Network Protocol

Hands-On Project 1-4 Using ipconfig, ping, and arp – Page 22 in the book
Time Required: 15 minutes
Objective: Use ipconfig, ping, and arp to view and test network addresses
and connectivity.
Required Tools and Equipment: Net-XX

Description: In this project, you use command-line tools to view your network configuration

and test your computer’s capability to communicate with other computers. The ipconfig command displays the IP address configuration of network interfaces. The ping command sends a message to a computer to verify the capability to communicate with it, and arp displays the MAC (physical) addresses your computer has discovered.

  1. Start your computer, and log on as NetAdmin, if necessary.
  2. Right-click Start and click Command Prompt to open a command prompt window. At the command prompt, type ipconfig and press Enter. You should see a screen similar to Figure 1-9, although the numbers you see will vary. The ipconfig command lists the IP address configuration for network interfaces as well as other network settings.

To see more details about your network configuration, type ipconfig /all and press
Enter. You can scroll up the command prompt window to see all the output. Under
the heading “Ethernet adapter Ethernet0,” find the row labeled Physical Address (see
Figure 1-10). The number you see in this row is the MAC address, a 12-digit hexadecimal value. Also, find the IP address in the IPv4 Address row. Write down these
two addresses:

  1. Tell your partner what your IP address is and make a note of your partner’s IP address. At
    the command prompt, type ping IPaddress and press Enter (replacing IPaddress
    with your partner’s IP address). You should see output similar to Figure 1-11.
  2. Remember that your computer needs both the destination IP address and MAC address to
    communicate with another computer. You supplied the IP address by typing it at the
    command prompt. Your computer discovered the MAC address of your partner’s
    computer by using Address Resolution Protocol (ARP). To see this address, type
    arp-a and press Enter. The output should be similar to Figure 1-12. You might see
    more lines of output, depending on what other devices your computer has been
    communicating with. ARP is discussed in more detail in Chapter 5, but for now, just
    know that it works automatically without user intervention.
  3. Use the ping command to communicate with other computers and devices on your
    network, and use ipconfig /all to find the addresses of your default gateway (a router
    in your network) and your DNS servers. Write the MAC addresses of your default gateway
    and DNS servers:
    • Default gateway: arp -a shows 00:50:56:01:40:8e
    • DNS servers: arp -a does not show anything for the dns server’s ip

Hands-On Project 1-8: Looking Up Computer and Networking Acronyms – Page 40 in the book.

Objective: Do online research to learn the meaning of common computer and networking acronyms.

Required Tools and Equipment: Net-XX and Internet access Description:

This project requires access to the Internet. Half the battle of learning any new field or technology is
learning the language used by professionals in the field. Computer and networking technologies are well known for their heavy use of acronyms. In this project, you use the Acronym Finder Web site to look up acronyms.

  1. Start your Web browser, and go to Figure 1-26 shows the Acronym Finder home page.
  2. You can look up acronyms by typing them in the “Abbreviation to define” text box at the top and clicking the Find button. If there’s more than one common definition for an acronym, Acronym Finder lists them by popularity ranking. Look up the following acronyms; you’ll need some of them later:

• TCP/IP Transmission Control Protocol/Internet Protocol
• Wi-Fi [not an acronym] (IEEE 802.11b wireless networking; coined from Wireless Fidelity, a play on High Fidelity)
• SSID Service Set Identification (IEEE 802.11 wireless networks)
• WEP Wired Equivalent Privacy (802.11 encryption protocol)
• OSI Open System Interconnection
• Ping Packet Internet Groper (common meaning, but probably not correct)
• UTP Unshielded Twisted Pair (Cat 5 network cabling)
• Cat6 CAT6 stands for Category 6 UTP Cable (computer networks)
• EMI Electromagnetic Interference
• RJ-45 RJ45 stands for Registered Jack – 45 (8 wire connector used in networking)

  1. Bookmark for future use, and exit your browser.