BEFORE YOU START If you are completing this lab at home or in the College outside of L17, just use your regular Internet connection For this lab be sure that your PC is configured to use automatic IP addressing and DNS Also, be sure you are connected to the Internet Check by starting your browser and connecting to any web site outside of the College Run the ipconfig all command and record the following information After you have recorded the information we will discuss what each item means DNS server(s) Adapter (or physical) address IP address Subnet mask Default gateway The netstat command can be used to view information such as the routing table, Ethernet statistics and currently active connections Type netstat at the command prompt What command line would you use to display current Ethernet statistics on a per protocol basis Run this command and record the number of IP packets received What command line would you use to display the current TCP stats Run this command line and record the number of segments sent What command would you use to display all current connections and listening ports Ping The ping command can be used to test the connection between and the existence of two devices on an IP network Ping will return the round trip time from your device to the device being pinged and back again Ping a local device and record the time A local device on the CIT network has an IP address beginning with 192 168 2 or 192 168 3 Ping an external (remote) device and record the time An external device has an IP address not 192 168 2 0 (CIT) network Your favourite web site will probably do TRACEROUTE The tracert command can be used to trace the route from your PC to another host on the Internet Tracert actually sends a ping packet with incrementing TTL values Since each router along the route will reply when the TTL expires, the incrementing value of the TTL ensures that each router will reply until the destination is reached At a command, prompt enter tracert web vaxxine com How many routers are between your PC and the web vaxxine com host At the command prompt, enter tracert www microsoft com How many routers are between your pc and the www microsoft com host ARP Address Resolution Protocol When a node needs to send an IP packet to another node on the same network it has to determine the physical (in our case that would be the Ethernet) address of the destination node The sending node will know the TCP IP address of the destination but needs to now discover the Ethernet address of the destination In order to do this it sends a broadcast on the local segment requesting the station with the destination IP address to reply with its Ethernet address (You can see this demonstrated with a packet sniffer but that is not on todays schedule ) However, you can still see the results of this communication between nodes using the ARP tool provided with Windows Go to a command prompt type arp a This will display your workstations current ARP table It is a dynamic table and therefore the entries change all of the time The table will list the IP addresses and corresponding Ethernet addresses of nodes that it has already communicated with Take a screen shot and paste it here Now, ping a node close to you ( ask someone else on the network for their IP address ) and then re run the arp a command You should now see the IP and MAC address of the station that you pinged Take another screen shot and paste it here Ping a station on the Internet and then run arp a Does the station that you just pinged show up on the table Why or why not When you are done, post this document on Blackboard

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BEFORE YOU START If you are completing this lab at home or in the College outside of L17, just use your regular Internet connection. For

BEFORE YOU START

If you are completing this lab at home or in the College outside of L17, just use your regular Internet connection.

For this lab be sure that your PC is configured to use automatic IP addressing and DNS. Also, be sure you are connected to the Internet. Check by starting your browser and connecting to any web site outside of the College.

Run the ipconfig /all command and record the following information. After you have recorded the information we will discuss what each item means.
1. DNS server(s):
1. Adapter (or physical) address:
1. IP address:
1. Subnet mask:
1. Default gateway:
The netstat command can be used to view information such as the routing table, Ethernet statistics and currently active connections.
1. Type netstat /? at the command prompt.
1. What command line would you use to display current Ethernet statistics on a per protocol basis?
1. Run this command and record the number of IP packets received.
1. What command line would you use to display the current TCP stats?
1. Run this command line and record the number of segments sent
1. What command would you use to display all current connections and listening ports?
Ping The ping command can be used to test the connection between and the existence of two devices on an IP network. Ping will return the round trip time from your device to the device being pinged and back again.
1. Ping a local device and record the time. A local device on the CIT network has an IP address beginning with 192.168.2 or 192.168.3.
2. Ping an external (remote) device and record the time. An external device has an IP address not 192.168.2.0 (CIT) network. Your favourite web site will probably do.
TRACEROUTE.

The tracert command can be used to trace the route from your PC to another host on the Internet.

1. Tracert actually sends a ping packet with incrementing TTL values. Since each router along the route will reply when the TTL expires, the incrementing value of the TTL ensures that each router will reply until the destination is reached.
1. At a command, prompt enter tracert web.vaxxine.com
  1. How many routers are between your PC and the web.vaxxine.com host?
1. At the command prompt, enter tracert www.microsoft.com
  1. How many routers are between your pc and the www.microsoft.com host?
ARP Address Resolution Protocol.When a node needs to send an IP packet to another node on the same network it has to determine the physical (in our case that would be the Ethernet) address of the destination node. The sending node will know the TCP/IP address of the destination but needs to now discover the Ethernet address of the destination. In order to do this it sends a broadcast on the local segment requesting the station with the destination IP address to reply with its Ethernet address.(You can see this demonstrated with a packet sniffer but that is not on todays schedule.) However, you can still see the results of this communication between nodes using the ARP tool provided with Windows.

Go to a command prompt type arp a

This will display your workstations current ARP table. It is a dynamic table and therefore the entries change all of the time. The table will list the IP addresses and corresponding Ethernet addresses of nodes that it has already communicated with.

Take a screen shot and paste it here.

Now, ping a node close to you (ask someone else on the network for their IP address) and then re-run the arp a command.

You should now see the IP and MAC address of the station that you pinged.

Take another screen shot and paste it here.

Ping a station on the Internet and then run arp a. Does the station that you just pinged show up on the table? Why or why not?

When you are done, post this document on Blackboard.