How does PAT differentiate between multiple internal hosts using the same public IP address? By assigning a unique IP address to each host By changing the protocol type for each host By allocating a unique Transport layer port ID for each connection By using different subnet masks for each host
Added by Nicole L.
Close
Step 1
Step 1: The question asks how Port Address Translation (PAT) differentiates between multiple internal hosts that share the same public IP address. Show more…
Show all steps
Your feedback will help us improve your experience
Akash M and 59 other AP CS educators are ready to help you.
Ask a new question
Labs
Want to see this concept in action?
Explore this concept interactively to see how it behaves as you change inputs.
Key Concepts
Recommended Videos
Q1. Hierarchical IP Address 1.1 Give a non-network example of hierarchical addressing and discuss how it reduces the amount of work needed in physical delivery. Do not use any example in the book, the postal service, or the telephone network. 1.2 A firm is assigned the network part 128.171. It selects a 10-bit subnet part. a) Draw the bits for the four octets of the IP address of the first host on the first subnet. (Hint: as we don't use all 1 or all 0, the 1st subnet/host is 00...01, while the last subnet/host is 11...10. The number of 1s and 0s in the expression depends on the length of the subnet/host part) b) Convert this answer into dotted decimal notation. c) Draw the bits for the second host on the third subnet. (In binary, 2 is 10, while 3 is 11.) d) Convert this into dotted decimal notation. e) Draw the bits for the last host on the (last number of your ID, if zero, use the one before the last number)th subnet. f) Convert this answer into dotted decimal notation. Q2. Wireshark for Packet Information 2. Visit calstate.edu, login to the system with your ID/password. Use Wireshark to capture this process. Find the packets with the following protocols: 1) TCP 2) UDP 3) HTTP and answer the following questions: a) What's the source/destination IP address? b) What type of protocol is it? c) What are the source and destination port numbers?
Akash M.
When a server receives a packet, how does it know whether that packet contains (part of) an email, a request for a website, an instant message, or something else altogether?
Madhur L.
Which of these ports would you be least likely to find open to a native service on a Linux host? a) 139 b) 53 c) 22 d) 443 2. What is the netmask of the network associated with host 128.227.224.196 having 8,190 hosts? a) 255.255.255.192 b) 255.255.192.0 c) 255.255.224.0 d) 255.255.255.0 3. Which of these precautions will not interfere with a traditional SSLStrip attack from working? a) Disallowing multiple MAC addresses for a single host in a network b) Always using https c) Using a separate process in each browser d) Navigating to a site whose HSTS super-cookie is loaded in your browser 4. Although nmap warns about -Pn slowing down a scan, proxychains nmap -Pn 10.70.184.1-254 -p 445 actually runs faster than the following nmap: proxychains nmap 10.70.184.1-254 -p 445. Why would that be? a) When -Pn isn't specified, both UDP and TCP ports are scanned. b) If ping fails, nmap will check an extra port (80) c) Because ICMP echo replies are always delivered as fast as port 445 replies. d) When -Pn isn't specified, the 10,000 most popular ports will be scanned. 5. What can Linux file access control lists do that normal file modes cannot do? a) They can provide special permission sets for individual users. b) They can set a file to run as the root user when executed, no matter who the owner of the file is. c) They can restrict permissions for a group of users in /etc/group d) They can set permissions on a link to a file. 6. Which of these ISO layer messages is likely to have the largest number of embedded protocol data units in it? a) Datalink. b) Session c) Network d) Application
Recommended Textbooks
Computer Science and Information Technology
Introduction to Programming Using Python
Computer Science - An Overview
Transcript
18,000,000+
Students on Numerade
Trusted by students at 8,000+ universities
Watch the video solution with this free unlock.
EMAIL
PASSWORD