2. Decode the following packet 0000 00 12 80 4b c0 7f 00 16 d4 b8 59 b1 08 00 45 00 K.... ..Y...E- d... d.-$-5.' mZ - -w ireshark 0010 00 3b 1f 27 00 00 80 11 d1 ae co a8 64 8a c0 a8 0020 64 01 04 24 00 35 00 27 6d 5a 18 Of 01 00 00 01 0030 00 00 00 00 00 00 09 77 69 72 65 73 68 61 72 6b 0040 03 6f 72 67 00 00 01 00 01 · org- а. What is the Source MAC address? b. What is the destination MAC address? Circle the Type field. d. What does the type field identify? How long is the IP Header? f. Highlight or underline the IP Header portion of this datagram g. How long is the datagram? C. е. h. IP ID is Are there any fragment flags set? Circle yes or no. j. What is the value of the time to live field? k. What protocol is identified in the Protocol Field I. i. If yes, which ones? What is the source IP Address? m. What is the destination IP Address?

tmppsxguyoigpnoymuwhug is the given message.starting 4 letter of the decrypted message is happ. decrypt the full message

QUESTION 12 Given the following Huffman encoding table, decode the message 000111010111110000011100011 Symbol code 000 001 010 011 a b d e f g T m r 100 101 1100 110 1110 1111 u For the toolbar, press ALT+F10 (PC) or ALT+FN+F10 (Mac). BIUS Paragraph Arial P 10pt !!! Tx X ום Q5

Name:... Homework #1 .... a. IP version b. Header Length c. Option (In bytes) d. Total Length...... e. Data size ..... ID:.............. 1- An IP packet has arrived with the first few value (0100 1100 0000 0000 0000 0000 0100 0000) in binary, answer the following questions CYB 122 2- If we have an IP packet of size 4000 bytes will be fragmented equally in two (equally )fragments a. the values of M bit of the flag field first fragment b. the values of M bit of the flag field Second fragment c. the values of Offset field on the first fragment. d. the values of Offset field on the Second fragment. e. the Total length field on the first fragment (if max options) f. the Total length field on the first fragment (if no options)

How does the individual come to be able to make moral decisions? e. All of the above a. By understanding his motives b. By understanding the consequences of his actions c. By being deterred and frightened of the penalties incurred on him for his action d. By understanding the means adopted to execute action   Known as “packet switches,” perform much of the work in getting data transmitted over the Net to its ultimate destination. a. Routers b. Packets c. Protocols d. Addresses   The fastest growing industries in cyberspace are called: a. information industries b. data industries c. information intermediaries d. data intermediaries   One of the challenges facing all social media sites is:   a. getting users b. monetizing their extensive web traffic c. Keeping users interested d. Providing information

(a) Using the correspondence1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27j k l n m s t u w x g h i o p q r v y z a b c d e f spacefind the numerical equivalent of the messageBUY ALL AVAILABLE STOCK AT MARKET.(b) Encode the message by postmultiplying the messagematrix M byA  °1 1 01 0 11 1 1¢ .(c) Verify your work by decoding the encoded message inpart (b).

Problem with constructing MAC. The messages X to be authenticated consists of z independent blocks, so that: X = x1||x2|| . . . ||xz, where every xi consists of |xi| = 8 bits. The input blocks are consecutively put into the compression function  ci = h(ci−1, xi) = ci−1⊕xi At the end, the MAC value: MACk(X) = cz+k mod 28 is calculated, where k is a 64-bit long shared key. Describe how exactly the (effective part of the) key k can be calculated with only one known message X.

CoAP messages are short. a) true b) false

A packet has arrived in which the offset value is 100. What is the number of thefirst byte?

183. The term that is used for physical path by which a message travels from sender to receiver is a. Jitter b. Protocol c. Transmission Medium d. Information