Do you know when the next interruption will occur? What does this have to do with switching contexts?
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- The TCP header does not have a boot ID field. Why isn't there a problem with one end of a TCP connection crashing and rebooting, then sending a message with an ID it had previously used?Please solve it correctly and please provide explanation of your answers. Please answer parts g, h and i. A PC and a Web Server are communicating over a TCP connection. The PC had started the three way handshake with the initial sequence number of 3069 . The Web Server's initial sequence number is 4830 . The window size of the PC is 815 bytes and the window size of the Web Server is 463 bytes. Using the third TCP handshake ack segment the PC sends the http request of the size 396 bytes to the Web Server. Then the Web Server answers with 3 segments containing the requested data. The first segment size is 42 bytes and the second segment size is 276 bytes and the third segment size is 146 bytes respectively. The PC receives all three segments within the timer. But unfortunately the second segment was corrupted. So the PC immediately sends an acknowledgement segment. Assume that the PC uses Selective Repeat/Reject ARQ. g) The second segment from webserver was corrupted. So the PC…Walk us through some methods for taking over a session. To what extent can this be defended?
- write a java program to demonstrate session trackingThis is case sensitive. The government hired you to decrypt the encrypted message. The hacker used a Denial of Service attack, which resulted in a massive blackout of the government websites' internet services. The only way to get things back to normal is to decode the message left by the hacker. The message has been decoded as follows: 01010011 01110100 01110101 01000100 01111001 00100000 01001000 01100001 01110010 01100100 00100000 00100110 00100000 01101101 01100001 01001011 01100101 00100000 01110011 01110101 01110010 01100101 00100000 01010100 01101111 00100000 01110000 01000001 01110011 01010011 00100000 01110100 01101000 01100101 00100000 01000101 01101101 01010000 01101111 01110111 01100101 01010010 01101101 01100101 01101110 01110100 00100000 01010100 01100101 01100011 01101000 01101110 01101111 01101100 00110000 01100111 01101001 01100101 01110011 00100000 01110011 01010101 01100010 01101010 01100101 01100011 01110100 00101110Computer Programs That Run The World Ask yourself this third question: Which possible downside of utilizing the at most once semantics for remote procedure calls do you think is the most severe, and why? 4. What is the only legal starting point for a mutex, and how do you establish it?
- What does it mean when the time it takes to switch contexts is proportional to the length of an interruption?Could you give me an example of how the line-waiting procedure works?One of the problems with the Internet email system is that sending forged emails is relatively straightforward, i.e., it is easy to send an email with a fake sender/from address. One solution to this problem would be for a domain’s mail servers to digitally sign any email originating from the domain. For this to be useful, the public key would need to be made available to clients to validate the signatures. It is proposed that the public keys of the mail servers will be verified and signed by a certification authority (same as SSL/TLS certificates) and distributed via a standardised URL for the domain, e.g., https://mybusiness.com/email.pubkey. (a) Explain how the client would obtain the public key and validate the email server’s digital signatures. (b) Discuss the problem of trusting the obtained public key and how this solution results in public keys that can/cannot be trusted. (c) Indicate whether you believe this approach could be used to prevent forged emails and explain why it…
- Encrypt the 12-bit plaintext 101010100111 using Simplified B-DES and the 9-bit key K = 010001111. This is a non-computer problem and you need to show all the steps of the encryption processDefine the phrase "dispatch latency" in your own words.A cryptography student has accidentally used the same keystream to encrypt two different messages, M1M1 and M2M2. We know that the ciphertexts are C1=0x5f2568184c2238f1C1=0x5f2568184c2238f1 and C2=0xc5bf0ed68609f02aC2=0xc5bf0ed68609f02a. We also happen to know that M1=0x412b890112d9615cM1=0x412b890112d9615c. a) What is M2M2 in hexadecimal? Please give your answer a leading 0x and use lowercase letters only. b) What is the keystream? Please give your answer a leading 0x and use lowercase letters only. Hint: These are all 8 byte numbers and will fit in an unsigned long type on most systems.