To answer this question, you may use the TCP state transition diagram.A TCP server is in the CLOSE_WAIT state.Then, it sends the following TCP packet:18.231.233.129.2447 > 18.192.197.68.63984: Flags [F.],seq 4257239425, ack 1847869857, win 518, length eWhat state is the server in now?O CLOSEDO LAST_ACKO YN_RCVDO ESTABLISHEDO CLOSE WAITO LISTEN

Answered: Image /qna-images/answer/79a7b1ed-bc1e-430a-8793-29b66845135b.jpg

Answered: To answer this question, you may use…

Computer Networking: A Top-Down Approach (7th Edition)

7th Edition

ISBN:9780133594140

Author:James Kurose, Keith Ross

Publisher:James Kurose, Keith Ross

Chapter1: Computer Networks And The Internet

Section: Chapter Questions

Problem R1RQ: What is the difference between a host and an end system? List several different types of end...

See similar textbooks

Similar questions

CIS269 **SEE ATTATCHED PICS FOR BEST TRANSLATION** Packet Translation Lab Break down the following IP datagram into its individual fields, listing the value of each. Hint: It’s an IP datagram containing a TCP segment containing another protocol… 45 00 00 31 94 00 40 00 80 06 1B 9F 80 A3 C9 29 D8 45 29 15 04 09 00 15 00 00 C3 A1 DF 65 A8 45 50 18 20 AA 8E 8C 00 00 43 57 44 20 66 75 6E 0D 0A
Using the following snort rule as a model, write one rule that would detect all of the packets shown: alert tcp any 80 -> any any (msg:"LOCAL my message"; content:"my content"; nocase; sid:1000110; rev:1;) Write a rule which will match all the following: 1. 64.12.10.32:8437 -> 204.126.133.22:80 GET /item.php? id=2&and&1=1 2. 64.12.10.47:8435 -> 204.126.133.22:80 GET /admin/sql/item.php? id=2/Setup.php 3. 64.12.10.2:8439 -> 204.126.133.22:80 GET /admin/login/item.php? id=2/userinfo.php 4. 64.12.10.18:2173 -> 204.126.133.23:80 POST /admin/adduser? item.php?id=2 5. 64.12.11.2:2174 -> 204.126.133.23:80 GET /php2-1- 1/admin/item.php?1=1 Answer:
SMTP (Simple Mail Transfer Protocol) is the standard protocol for transferring mail between hosts. A TCP connection is set up between a user agent and a server program. The server listens on TCP port 25 for incoming connection requests. The user end of the connection is on a TCP port number above 1023. You have defined the packet filter rule set shown in the table below. These rules permit and/or deny inbound and outbound traffic between the user agent and the mail server. Describe the purpose of each packet filter rule in the table. Rule Direction Source Address Destination Address Protocol Destination Port Action A2 In External Internal TCP 25 Permit B2 Out Internal External TCP > 1023 Permit C2 Out Internal External TCP 25 Permit D2 In External Internal TCP > 1023 Permit E2 Either Any Any Any Any Deny
If a host has received the following segments in TCP:[1, 1000], [4001, 5000], [5001, 6000], [1, 1000]. (1)Show the contents of SACK option to be sent.
QUESTION 13 Fill the blank With the TCP server, there is a welcoming socket, and each time a client initiates a connection to the server, a new socket is created. Thus, to support n simultaneous connections, the server would need sockets. O n-1 On O n+1 01
Using the following snort rule as a model, write a rule that would detect all the packets shown (1-6): alert tcp any any -> any 80 (msg:"LOCAL my message"; content:"my content"; nocase; sid:1000110; rev:1;) Write a rule which will match all the following: 1. 64.12.10.32:8437 -> 204.126.133.22:80 GET /admin/scripts/setup.php 2. 64.12.10.47:8435 -> 204.126.133.22:80 GET /phpAdmin/Setup.php 3. 64.12.10.2:8439 -> 204.126.133.22:80 GET /php2-1- 10/siteadmin/login.php 4. 64.12.10.18:2173 -> 204.126.133.23:80 POST /admin/scripts/setup.php 5. 64.12.11.2:2174 -> 204.126.133.23:80 GET /php2-1- 10/admin/main/setup.php 6. 64.12.11.2:2176 -> 204.126.133.23:80 GET /ADMIN/PHP/SCRIPTS/login.ph e p Note: Full points are given only if your rule is precise and doesn't generate a lots of false positives. Answer:
What mechanism does TCP use for flow control? The receiver indicates how much data it is able to receive in the "receive window" field of the TCP header. а. O b. TCP does not use flow control. O c. The sender estimates its congestion window, increasing it when it receives ACKS for previously sent data, and reducing it when a loss even occurs, like the expiration of the retransmission timer or three duplicate ACKS.
Explain what this rule does: alert tcp any any -> 192.168.1.0/24 80 (content:”|A1 CC 35 87|”; msg:”accessing port 80 on local”).
Write a snort rule to generate an alert for the following: search for the word “HTTP” in the first 20bytes of the payload of a packet that is originating in subnet (192.168.34.0/24) and going toyour subnet (192.168.56.0/24). The alert should read: “HTTP detected”. Could you please also include the nmap command used to scan the target?

Recommended textbooks for you

Computer Networking: A Top-Down Approach (7th Edi…

Computer Engineering

ISBN:

9780133594140

Author:

James Kurose, Keith Ross

Publisher:

PEARSON

Computer Organization and Design MIPS Edition, Fi…

Computer Engineering

ISBN:

9780124077263

Author:

David A. Patterson, John L. Hennessy

Publisher:

Elsevier Science

Network+ Guide to Networks (MindTap Course List)

Computer Engineering

ISBN:

9781337569330

Author:

Jill West, Tamara Dean, Jean Andrews

Publisher:

Cengage Learning

Computer Networking: A Top-Down Approach (7th Edi…

Computer Engineering

ISBN:

9780133594140

Author:

James Kurose, Keith Ross

Publisher:

PEARSON

Computer Organization and Design MIPS Edition, Fi…

Computer Engineering

ISBN:

9780124077263

Author:

David A. Patterson, John L. Hennessy

Publisher:

Elsevier Science

Network+ Guide to Networks (MindTap Course List)

Computer Engineering

ISBN:

9781337569330

Author:

Jill West, Tamara Dean, Jean Andrews

Publisher:

Cengage Learning

Concepts of Database Management

Computer Engineering

ISBN:

9781337093422

Author:

Joy L. Starks, Philip J. Pratt, Mary Z. Last

Publisher:

Cengage Learning

Prelude to Programming

Computer Engineering

ISBN:

9780133750423

Author:

VENIT, Stewart

Publisher:

Pearson Education

Sc Business Data Communications and Networking, T…

Computer Engineering

ISBN:

9781119368830

Author:

FITZGERALD

Publisher:

WILEY

SEE MORE TEXTBOOKS