ch02_updated_hw - Homework Updated January 2007 Chapter 2...

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Homework Updated January 2007 Chapter 2 Network Standards L e a r n i n g   O b je c ti v e s : Last Name: ____________________________________________________ First Name: ____________________________________________________ Due Date: __________________________________ Test Your Understanding 1. a) What are standards? b) In this book, will we use the terms standards and protocols interchangeably? 2. a) What two things about messages do standards govern? b) Distinguish between semantics and syntax. 3. a) What are the three general parts of messages? b) What does the data field contain? c) What is the definition of a header? d) Is there always a data field in a message? e) What is the definition of a trailer? f) Are trailers common? g) Distinguish between headers and header fields. 4. a) What is reliability? b) How does TCP implement reliability? c) In TCP, what is the receiver’s role in reliability? d) In TCP, what is the sender’s role in reliability? e) What is the disadvantage of reliability? Chapter 2-1
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5. a) Distinguish between connectionless and connection-oriented protocols. b) Which can have sequence numbers? c) What are the advantages that sequence numbers bring to connection-oriented protocols? d) Explain fragmentation and reassembly. e) What is the disadvantage of connection-oriented protocols? f) Are most protocols connectionless or connection-oriented? g) Are most protocols reliable or unreliable? 6. a) What is a network architecture? b) What is the most popular network architecture today? c) In layered standards architectures, to what layer or layers does a layer provide service? 7. a) What devices does a physical link connect? b) What is a data link? c) Five switches separate two computers on a network. How many physical links are there between the two computers? d) How many data links are there between them? e) What do data link layer standards govern? f) Which layers govern LAN transmission? g) Which layers govern WAN transmission? 8. a) What do the internet and transport layers do collectively? b) Distinguish between what the internet and transport layer standards govern. c) What is the main internet layer standard? d) What errors does the transport layer usually fix? 9. a) What do application layer standards govern? b) Which layer has the most standards? Why is this the case? Begin the box “Why Layered Architectures?” 10. (From the box “Why Layered Architectures?”) Why do standards architectures break down the standards development process into layers? End the box “Why Layered Architectures?” 11. What is an octet? 12. a) How long are Ethernet addresses? b) When are Ethernet addresses set on NICs? c) In what notation are they typically written for human reading?
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ch02_updated_hw - Homework Updated January 2007 Chapter 2...

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