Maximum Transmission Unit (MTU): Longest prefix matching: IP Fragmentation: Consider sending a 2,400-byte datagram into a link with a MTU of 900 bytes. Suppose the original datagram has the identification number 422. (a) How many fragments are generated? (b) For each fragment, what is its size, what is the value of its identification, fragment offset, and fragment flag? Length ID Fragment Flag Offset

Maximum Transmission Unit (MTU): Longest prefix matching: IP Fragmentation: Consider sending a 2,400-byte datagram into a link with a MTU of 900 bytes. Suppose the original datagram has the identification number 422. (a) How many fragments are generated? (b) For each fragment, what is its size, what is the value of its identification, fragment offset, and fragment flag? Length ID Fragment Flag Offset

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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Problem 1-IP Fragmentation Consider sending 2000-byte datagram into a link that has an MTU of 500 bytes. a) How many fragments are generated? b) What are their characteristics (i.e. what are the flags and offset values for each and start and ending of data bytes of each fragment (Assume that the DF flag was not set :) Solution: Assume that no optional fields of the IP header are in use (i.e. IP header is 20 bytes) c) When a large datagram is fragmented into multiple smaller datagrams, where are these smaller datagrams reassembled? d) Explain how traceroute works. Include a traceroute to a host at least 8 hops away.
Quiz 3ERP Communication InfrastructureQ1- Consider a message 11100011 and a divisor 110011, then use mod 2 binary division method to calculate the CRC bits sequence with the verification at the receiver. General Instructions:  Write your name and student ID on every page of your quiz.  Quiz must be submitted on LMS.  Quiz must be uploaded in PDF or Word format.  No quiz will be entertained after deadline.  Cheating and copying will not be accepted.
. Consult the MIME RFC to find out how base64 encoding handles binary data of a length not evenly divisible by three bytes. The POP3 Post Office Protocol only allows a client to retrieve email, using a password for authentication. Traditionally, to send email a client would simply send it to its server (using SMTP) and expect that it be relayed. (a) Explain why email servers often no longer permit such relaying from arbitrary clients. (b) Propose an SMTP option for remote client authentication. (c) Find out what existing methods are available for addressing this issue.
In this problem, we will get practice with computing the one’s complement of the one’s complement sum over a sequence of data values. We will use the exact same algorithm used to compute TCP/UDP checksum, but over a sequence of 4-bit chunks rather than 16-bit chunks. (a) Consider the following data bits. What is the (4-bit) checksum of this (8-bit) data? 0101 1100 (b) Consider the following data bits. What is the 4-bit checksum of this (12-bit) data? (Note: you may be able to reuse calculations from part (a).) 0101 1100 1001
Network & Data Communcations
Suppose that a packet’s payload consists of 10 eight-bit values (e.g., representing ten ASCII-encoded characters) shown below. (Here, we have arranged the ten eight-bit values as five sixteen-bit values). Compute the two-dimensional parity bits for the 5 rows (starting from the top). Combine the bits into one string. 01111001 00111000 11111001 00111000 11011111 11011101 01101010 00110010 10110110 01110010
SInternet Check sum Consider the figure below (simplex communication scenario). The TCP sender sends an initial window of 4 segments. Suppose the initial value of the sender ན༽)། sequence number, SEQ1, is 100 and the first 4 segments each contain 400 bytes of payload. As you can see ACK 3 is lost. What is the SEQ number (SEQ2, SEQ3, SEQ4, SEQ5) from the Sender and ACK Number (ACK1, ACK2, ACK3, ACK4, ACK5) from the receiver for each segment? Sender Seq1 Seq2 Seq3 Seg4 ACK1 ACK2 ACK3 ACK4 Seq5 ACK5 Receiver
What is an Internet protocol (IP) address exactly? What use do mnemonic addresses serve? Exists a limit on the number of domains a 32-bit representation may contain? If true, how many computers can a domain include simultaneously?
I got wrong answer from you guys. Now don't give wrong answer or Don't use Al tool to generate answer. If I see these things I'll report your account.
assume that the link layer uses the flag bytes with byte stuffing approach for framing, with the following details: The beginning of a data frame is indicated by the special flag bytes: DLESTX The end of a data frame is indicated by the special flag bytes: DLEETX The special escape bytes DLE are used for escaping accidental occurrences of either the flag bytes or the escape bytes within the data. For simplicity, assume that no other header/trailer information is added to the data. 1. The following byte stream represents data that needs to be framed by the link layer on the sender’s side. Derive the resultant byte stream by adding necessary flag bytes and performing byte stuffing. PARSDLEETXZKPUM I have this answer but it is wrong DLESTXPARDLEETXZKPUMDLEETX
Find the extended basic blocks and list their distinct paths. Apply local value numbering (LVN) to each block. Apply superlocal value numbering (SVN) to the EBBs. Note any improvements that it finds beyond those found by LVN.
3. Consider the M/M/1 queue discussed in class. Assume that packets arrive to a queue with average arrival rate A [pkts/s]. The average service rate of the queue is denoted by u [pkts/s]. (a) Write expressions for: (i) the mean time between packet arrivals to the queue, i.e., the average inter-arrival time; and (ii) the mean service time, i.e., the average time needed to transmit a packet onto the outgoing link. (b) Let N denote the number of packets in the system in steady-state. Suppose A = 850 and u 1000. Find the smallest value of B such that P(N > B) < e = 10¬4. Hint: Use MATLAB or some other computational tool (you could even use an Excel spreadsheet) to test different values of B. 4. Consider the M/M/1 queue from Problem 3. (a) Find an expression for E[N], i.e., the average number of packets in the system in steady- state. For the values of A and µ specified in Problem 4(b), compute the value of E[N]. What happens when A→ µ? (b) Find an expression for Var[N], i.e., the variance…