Lab 1-10 Testing Network Connectivity

 

One of the protocols used in the TCP/IP suite is called PING (Packet Internet Groper). Ping uses a series of Internet Message Control Protocol (ICMP) packets to determine whether a remote host is active and what the round trip delay currently is in communicating it.

 

Parker Sneevle is trying to get to the server named teechur.com but it’s not working. You can test his computer’s connectivity to that computer by using Ping. This works the same in Windows 9x, XP, or Vista.

 

  1. Open your command prompt (DOS prompt in Windows 9x). Do this in your DELL!

 

  1. At the prompt type ping www.teechur.com.

 

  1. ping1

 

  1. You see the information above. This means that for some reason, the ICMP packets did not reach the remote computer. This could be caused by a number of situations:

 

    1. The server is down
    2. The network is using a firewall that blocks ICMP packets
    3. The network card on the local computer isn’t working.
    4. The network card on the remote computer isn’t working.
    5. The DNS server is not resolving the IP address correctly.
  1. You have a couple of options here. If you know the IP address of the remote computer and you know that the network is not blocking ICMP packets, you can type ping followed by the IP address. You can also test your local network card to ensure that it is working. Since troubleshooting protocol dictates that you start locally and work your way out, you’re going to start by testing your local network card.
  2. You can use the ping command to do this using the loopback address of 127.0.0.1. At the command prompt type ping 127.0.0.1.
  3. You see the following: ping2
  4. You determine that the network card is working. How can you tell? (Answer below)

 

  1. Obtain the IP address of teechur.com from me. Ping the ip address.

 

  1. Is Teechur.com working? (answer below)

 

 

You can use the ARP (Address Resolution Protocol) to identify the hardware address of a computer you have connected to by domain name, mapped network drive, or UNC pathname.

 

  1. Log into Windows XP.
  2. Open the command prompt.
  3. At the command prompt type ARP and hit enter.
  4. List the switches you can use with this command.

 

Switch

Purpose

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

  1. Type arp –a and hit enter.
  2. List the computers your computer is currently connected to.

 

IP Address

Network Address

 

 

 

 

 

 

 

 

 

Which one is the server?

 

 

No go into your server, make sure everyone is started up and network cables are connected. Log in.

 

Fill out below:

 

 

Student Name

Server Name

IP Address

MAC Address

1

 

 

 

 

2

 

 

 

 

3

 

 

 

 

 

 

  1. At the command prompt, everyone type ping 127.0.0.1. Write down what happens.

 

 

 

 

127.0.0.1 is the “home” address, or built in address of your network card. EVERY network card uses this and it’s only used to test that the card works. If you get a timeout, that means the card isn’t working!

 

 

  1. Student 1 ping student 2 from command prompt of your server. Write down what happens in the white space below.
  2. Student 2 ping student 1.
  3. Student 3 ping student 1.
  4. Student 1 ping student 3.
  5. Student 2 ping student 3
  6. Student 3 ping student 2.
  7. Do an arp –a from your command prompt (everyone). Do you see everyone’s IP address? Write down the MAC address (media access code) for each one on the table above.

 

 

Now fire up your virtual servers. Ping each one to ensure your network is working.

 

Virtual Server Name

IP Address

Successful Ping?

MAC Address