Chapter20 - CHAPTER 20 SMTP Exercises 1. MIME-version: 1.1...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1 CHAPTER 20 SMTP Exercises 1. MIME-version : 1.1 Content-Type : Text/Plain Content-Transfer-Encoding : 7bit 3. 1000 × 8 /24 = 333.3 ====> 334 blocks of 24 bits. Each block becomes 32 bits. There are 334 × 32 / 8 = 1336 bytes in the encoded message. There are 336 redundant bytes. The ratio of redundant bytes to the entire message length is 336 /1336 = 0.25. 5. The efficiency in Exercise 3 is 1,000/1,336 = 75%. The efficiency in Exercise 4 is 1,000/1,200 = 83%. The efficiency is improved 8%. 7. a. Original: b. Encoded: 01010111 00001111 11110000 10101111 01110001 01010100 01010111 00001111 =F0 =AF 01110001 01010100
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
SECTION 2 c. Bit Pattern: 9. a. Original: b. Encoded: c. Bit Pattern: 11. The MAIL FROM: in the envelope contains the source e-mail address while the FROM in the header contains the name of the sender. 13. See Figure 20.1. 15. See Figure 20.2. 01010111 00001111 00111101 01000110 00110000 00111101 01000001 01000110 01110001 01010100 01010111 00001111 11110000 10101111 01110001
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 04/26/2010 for the course CSE CS501 taught by Professor Dmathur during the Winter '10 term at National Institute of Technology, Calicut.

Page1 / 6

Chapter20 - CHAPTER 20 SMTP Exercises 1. MIME-version: 1.1...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online