1. Why do we set a hostname for our system? What would happen if two machines ha
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Question
1. Why do we set a hostname for our system? What would happen if two machines had the same hostname?2. Use the ipconfig command at the command prompt to find out your MAC address and IP address.
What is the purpose of a MAC address for a nic?
3.Download and install Wireshark onto your virtual machine (www.wireshark.org)
What does Wireshark do? How does it function? How can it be useful to a network administrator?
4. pen a command line window and type the command to ping your host system but don't yet press Enter (ITNET-XX).
Open Wireshark and begin capturing packets
Go back to your command line window and start the ping by pressing enter.
Stop capturing packets and inspect what the application has assembled.
What is a packet? Explain two reasons why computers utilize packets? Describe the parts of a packet and what each part is comprised of.
5. Look for the first packet where you were pinging the host system. Open the packet to inspect it.
What is the packet number of this initial ping request? How did you find this?
What is the length of this packet? What determines the size of a packet?
Explanation / Answer
1. We set hostnames for systems to make it easier for humans to remember identifiers. If two machines have the same hostname on the same domain, it causes problems since a Domain Name Server will (typically) only associate a single IP address with a given host.domain name. In such a case, only the hostname that is registered with the DNS will receive communications from remote hosts. 2. To check your mac address you use "ipconfig /all" An example mac address is 08:00:27:00:C0:3B. An example IP address is 192.168.1.107 3. You really had better do this one, Wireshark is an important tool to have. 4. A packet is a bundle of information encapsulated within a header and footer. This header and footer contain protocol information, source and destination address, and parity or a CRC used by the recipient to validate the information sent. 5. The packet (sequence) number is 17, as specified by the ICMP Sequence Number. The total length of the packet is 60 bytes. The size of the packet is determined by the length of the header/footer and the encapsulated data.
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