Client (Shahid) 198.150.11.34 Client (Khalid) 198.150.11.163 FE.ED.F9:44:45:66 FE:ED:F9.EF.ED.EC 198.150.11.65 198.150.11.66 198.150.11.161 198.150.11.33 DD:EC:BC:AB:04:AC 198.150.11.45 DD:EC:BC:43:7B:34 198.150.11.165 FE ED.F9:FE:44:AF FE:ED:F9:89 54:23 In the above network diagram, IP and MAC addresses are given for network nodes. Suppose Host1 (Shahid) sends a datagram to Host2 (Khalid). What IP and MAC addresses (source

Client (Shahid) 198.150.11.34 Client (Khalid) 198.150.11.163 FE.ED.F9:44:45:66 FE:ED:F9.EF.ED.EC 198.150.11.65 198.150.11.66 198.150.11.161 198.150.11.33 DD:EC:BC:AB:04:AC 198.150.11.45 DD:EC:BC:43:7B:34 198.150.11.165 FE ED.F9:FE:44:AF FE:ED:F9:89 54:23 In the above network diagram, IP and MAC addresses are given for network nodes. Suppose Host1 (Shahid) sends a datagram to Host2 (Khalid). What IP and MAC addresses (source

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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Make 15 subnet of 145.61.69.0/24.And give all the information like broadcast address , range..etc. 5 subnet of size 9 . 5 subnet of size 3 5 subnet of size 13 I will award u 20 dislikes, do not copy paste. Better for u to leave it. Skip it. "Click on insufficient subject knowledge" do not reject"
Let's pretend that Alice and Bob are exchanging data packets across a network.Let's say Trudy infiltrates the network and is able to read all of Alice's data, then forwards it on to Bob along with whatever other information she chooses. Provide some examples of what kind of harm Trudy can do from this vantage point.
Q5) Using RSA algorithm, Assume: p= 7 , q = 13, e = 5, d = 29.c) What is the ciphered text if the encrypted message = “P”?
MAC algorithm is a symmetric key cryptographic technique to provide message authentication. For establishing MAC process, the sender and receiver share a symmetric key K. Essentially, a MAC is an encrypted checksum generated on the underlying message that is sent along with a message to ensure message authentication. 1) Illustrate the MAC process. 2) According to the illustration in (1), explain in details each of the processes. 3) Discuss the limitations of MAC
I will downvote surely , solve only if you are 100% sure. Question Consider Bob uses an e-mail client (mail reader) such as Outlook to send an e-mail to Alice who uses Web-based e-mail account (Gmail). The IP address of Alice's mail server is initially unknown to Bob's mail server. What will be the correct sequence of activity for transport and application layer protocols that are involved from the time when Bob sends the e-mail to the time when Alice reads it? S₁: DNS over UDP is used by Bob's mail server to get the IP address for Alice's mail server. S₂: SMTP over TCP is used to transfer the mail from Bob's mail server to Alice's mail server. S3: SMTP over TCP is used to transfer the mail from Bob's e-mail client to his SMTP server. S4: HTTP over TCP is used by Alice to read this e-mail.
11. Using RSA algorithm, what is the value of cipher text C, if the plain textM = 5 and p = 3, q = 11 & d = 7 ? a. 33 b. 5 c. 25 d. 26
QUESTION 60 Attacks on encryption schemes include: cipher-text only attack chosen-plaintext attack hash collision attack known-plaintext attack QUESTION 61 Stop-and-wait achieves higher utilization than selective repeat True False QUESTION 62 Order the following switching fabric from the worst to the best Switching via bus Switching using crossbar Switch via memory QUESTION 63 Using CIDR, How many hosts can be in a subnet a.b.c.d/27? Recall that no host has all zeros or all ones QUESTION 64 MAC is bits IPv4 is bits IPv6 is bits QUESTION 65 OSPF can handle larger network by using ________ OSPF. QUESTION 66 _________ is used to gradually migrate from IPv4 to IPv6
1. We assume Z26 ={0, 1, …, 25} is the alphabet for One-Time Pad, and the Plaintext space = Ciphertext space = Key space = (Z26)5. If the plaintext is (11, 8, 5, 19, 22) and the key is (2, 20, 15, 10, 6), what is the ciphertext? ( ) (13, 2, 20, 3, 2). (13, 28, 20, 29, 28). (13, 28, 20, 29, 2) (13, 24, 6, 23, 24). 2. We assume Z26 ={0, 1, …, 25} is the alphabet for One-Time Pad, and the Plaintext space = Ciphertext space = Key space = (Z26)5. If the ciphertext is (11, 24, 5, 19, 22) and the key is (2, 20, 2, 10, 23), what is the decrypted plaintext? ( ) (13, 18, 7, 3, 19). (9, 4, 7, 29, 25). (13, 18, 3, 29, 25) (9, 4, 3, 9, 25). 3. For the binary version of One-Time Pad, if the ciphertext is 10110010 and the key is 01011010, what is the corresponding plaintext? ( )
Make 17 subnet of 145.68.69.0/24.And give all the information like broadcast address , range..etc. 2 subnet of size 9 . 5 subnet of size 67 7 subnet of size 59 3 subnet of size 91. I will award u 20 dislikes, do not copy paste. Better for u to leave it. Skip it.
1. Basics: Each answer should consist of at most three sentences. (a) What does Kerckhoff’s principle say and why is it important? Give an example where Kerckhoff’s principle is violated. (b) Explain the advantages and disadvantages of a One-Time Pad. What is the connection between OTP and Stream Ciphers? (c) State if the following finite fields exist or not and why: GF(10) GF(16) GF(27) GF(66) GF(512)
Question no 2 15Perform encryption using a one-round version of DES. Start with the same bit pattern for the key K and the plaintext, namely:Hexadecimal notation: 0 1 2 3 4 5 6 7 8 9 A B C D E FBinary notation: 0000 0001 0010 0011 0100 0101 0110 0111 1000 1001 1010 1011 1100 1101 1110 1111a. Derive K1, the first-round subkey.b. Derive L0, R0.c. Expand R0 to get E[R0], where E[ # ] is the expansion function of Table S.1.d. Calculate A = E[R0] ⊕ K1.e. Group the 48-bit result of (d) into sets of 6 bits and evaluate the corresponding S-box substitutions.f. Concatenate the results of (e) to get a 32-bit result, B.g. Apply the permutation to get P(B).h. Calculate R1 = P(B) ⊕ L0.i. Write down the ciphertext
Question 1 :a) Generate the public private key pairs for Bob using the following values Bob P = 19Q = 13b) Encrypt the message “Network” using public key of Bob and then decrypt the message to get the plain text back