Question

Question 4 CRC (20 points) 1) If the message to be sent over the oth pack over the 10th packet is 11101011 construct data frame with CRC tall by Ting generator of 1The leader is 01111110 2) Explain how it detects errors at receiver if assumed th eets trots at receiver if sumed the sth bit of the packet got inverted during the propagation

Answer 1

cycle Redundang Melhad of deteling les a Grenuratos pynomial Con bolh sender & teceiver side check CRC- ETTOSS ) Message: Ilolol1 Polynown: n+a+1 Perform Modulo-2 dinsion bnay Append H TerOS to degee 4 palymam- Sinie wesage t10011 at4a+i loo1111 IO1011000O1 IDDII II00 T0011 J0O1I I0011 1ol00 O0000 10011 10011 tiol Remainder Therefre eqired datakame with CRC Menge+ Rewnairdes (Exluding heder 11101011110l

2) It is assumed That sh bit of packet got nveated durning propagalin i-e, frame rewived be ike, 11lolo10110 Inveated bit dn the Tecelver side, Same- o01 010101i011O10 Key loo11 _10011 Il111 1000 1ODL 1 01001 0000 I0011 00011 Remalnder Madulo -2 binary divistm wh same key ,we On a nen-zero Tewalnder. This Indicate an erras is oxcured et The propagalin durmng