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asgn5_mis320.docx
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This is the second time I try to tell you. sir please contact me to my
phone I will need you to help me in an exam and I need an interactive
way
It is +16812229922 I do have whatssapp
MIS: Networks and Security
(Fall Semester 2017)
Assignment – 5 sir
Maximum Points – 30
I understand some of you are having trouble with second part of Assignment 5 as you
are not able to access https://whois.icann.org/en
In that case, please use https://www.whois.com/
Date Due: November 22, 2017
DNS Background Information:
DNS – A DNS system is a global naming system built on a distributed database. The database
translates the alphanumeric addressing that is easy for people to understand into the numerical
addressing that is easy for the computer to understand. If the DNS server does not have the
address in its database then it will send queries to other DNS servers looking for answers. The
DNS protocol is commonly used when you are attempting to visit a website for the first time
(a.k.a. you do not have any of the site information stored in a cache file), your computer will
interact with the website (host) as follows:
Your computer will send a DNS query packet to the host.
The host will send a reply packet, which includes the following fields:
Time – This field shows the time (in seconds) elapsed between the DNS query and the reply.
Transaction ID – This field contains an ID code that should match the Transaction ID listed in
the DNS query packet.
Queries – This is simply the DNS query restated.
Answers – Shows the type of address (in this case will be type A for a host address), the name of
the host, IP address, and the “Time to live” value which states how long your computer is allowed
to cache the website information; this is why a website will load faster if you had previously
visited it recently.
CNAME- With many systems the address you request does not necessarily correspond to the
server name you enter. For example many larger websites like Amazon or Apple will have many
broadly distributed webservers servicing the same site. The Canonical Name or CNAME is the
name of the server that their DNS directs you to.
MDNS- or Multicast DNS. Provides a DNS service to smaller networks that might not have DNS
servers of their own. MDNS operates just as DNS does except instead of sending a packet
directly to a DNS server the requesting machine sends a broadcast packet to all addresses looking
for a match. Much like ARP.
Error Message Packets – Any packets containing errors will be displayed under “info” as: “No
such name,” “Server failure,” etc.
Assignment
Open the Evidence03.pcap file using Wireshark. In the Filters field type in ‘dns’ to show only
DNS protocol packets. Click Apply.
Analyze the packets by looking in the packet details (middle) pane to determine the answers to
the following questions. Clicking on the arrow next to the information shows more of the data.
Please answer these questions in the Assessment.
1. What are the following IP addresses? And CNAMES if applicable?
a) Metrics.apple.com
b) A1.phobos.apple.com
c) Ax.itunes.apple.com
d) Ax.search.itunes.apple.com.
2. What port does DNS traffic use?
3. What is the broadcast address used by MDNS?
Useful Links:
Wikipedia: List of DNS record types.
http://en.wikipedia.org/wiki/List_of_DNS_record_types
Multicast DNS
http://files.multicastdns.org/draft-cheshire-dnsext-multicastdns.txt
The evidence03.pcap file was created by Sherri Davidoff and Jonathan Ham for their Forensics
contest website (http://forensicscontest.com). Copyright Lake Missoula Group, LLC.
(http://lakemissoulagroup.com) Used with Permission.
Section II: WHOIS
On your own computer, go to https://whois.icann.org/en
Enter the domain name of “Google.com”
1. When does the Google domain name expire?
2. Who is the Registrar?
3. What is a DNS registry?
2
This is the second time I try to tell you. sir please contact me to my
phone I will need you to help me in an exam and I need an interactive
way
It is +16812229922 I do have WhatsApp
If you cannot talk to me give me your phone number.
If you prefer so we can talk to via WhatsApp and still do study pool
payment.
MIS: Networks and Security
(Fall Semester 2017)
Assignment – 5 sir
Maximum Points – 30
I understand some of you are having trouble with second part of Assignment 5 as you
are not able to access https://whois.icann.org/en
In that case, please use https://www.whois.com/
Date Due: November 22, 2017
DNS Background Information:
DNS – A DNS system is a global naming system built on a distributed database. The database
translates the alphanumeric addressing that is easy for people to understand into the numerical
addressing that is easy for the computer to understand. If the DNS server does not have the
address in its database then it will send queries to other DNS servers looking for answers. The
DNS protocol is commonly used when you are attempting to visit a website for the first time
(a.k.a. you do not have any of the site information stored in a cache file), your computer will
interact with the website (host) as follows:
Your computer will send a DNS query packet to the host.
The host will send a reply packet, which includes the following fields:
Time – This field shows the time (in seconds) elapsed between the DNS query and the reply.
Transaction ID – This field contains an ID code that should match the Transaction ID listed in
the DNS query packet.
Queries – This is simply the DNS query restated.
Answers – Shows the type of address (in this case will be type A for a host address), the name of
the host, IP address, and the “Time to live” value which states how long your computer is allowed
to cache the website information; this is why a website will load faster if you had previously
visited it recently.
CNAME- With many systems the address you request does not necessarily correspond to the
server name you enter. For example many larger websites like Amazon or Apple will have many
broadly distributed webservers servicing the same site. The Canonical Name or CNAME is the
name of the server that their DNS directs you to.
MDNS- or Multicast DNS. Provides a DNS service to smaller networks that might not have DNS
servers of their own. MDNS operates just as DNS does except instead of sending a packet
directly to a DNS server the requesting machine sends a broadcast packet to all addresses looking
for a match. Much like ARP.
Error Message Packets – Any packets containing errors will be displayed under “info” as: “No
such name,” “Server failure,” etc.
Assignment
Open the Evidence03.pcap file using Wireshark. In the Filters field type in ‘dns’ to show only
DNS protocol packets. Click Apply.
Analyze the packets by looking in the packet details (middle) pane to determine the answers to
the following questions. Clicking on the arrow next to the information shows more of the data.
Please answer these questions in the Assessment.
1. What are the following IP addresses? And CNAMES if applicable?
a) Metrics.apple.com
b) A1.phobos.apple.com
c) Ax.itunes.apple.com
d) Ax.search.itunes.apple.com.
2. What port does DNS traffic use?
3. What is the broadcast address used by MDNS?
Useful Links:
Wikipedia: List of DNS record types.
http://en.wikipedia.org/wiki/List_of_DNS_record_types
Multicast DNS
http://files.multicastdns.org/draft-cheshire-dnsext-multicastdns.txt
The evidence03.pcap file was created by Sherri Davidoff and Jonathan Ham for their Forensics
contest website (http://forensicscontest.com). Copyright Lake Missoula Group, LLC.
(http://lakemissoulagroup.com) Used with Permission.
Section II: WHOIS
On your own computer, go to https://whois.icann.org/en
Enter the domain name of “Google.com”
1. When does the Google domain name expire?
2. Who is the Registrar?
3. What is a DNS registry?
2
…
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