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a) Describe the simple message ordering in HTTP. [53];b) In HTTP, can the server transmit if it has not received...

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a) Describe the simple message ordering in HTTP. [53];b) In HTTP, can the server transmit if it has not received a request message from the client? [53];c) Describe the three-step handshake in TCP connection openings. [53-55];d) What kind of message does the destination host send if it does not receive a segment during a TCP connection? [54-55];e) What kind of message does the destination host send if it receives a segment that has an error during a TCP connection? [54-55];f) Under what conditions will a source host TCP process retransmit a segment? [55];g) Describe the four-step handshake in TCP connection closes. [56];h) After a side initiates the close of a connection by sending a FIN segment, will it send any more segments? Explain. [56];i) In Figure 2-7, suppose Host A had already sent A6 before it realized that it would need to resend A5. When it then resent A5, A6 would arrive before A5. How would Host B be able to put the information in the two segments back in order? [55-56];4. a) What are the three general parts of messages? [57-58];b) What does the data field contain? [58];c) What is the definition of a header? [58];d) Is there always a data field in a message? [58];e) What is the definition of a trailer? [58];f) Are trailers common? [58];g) Distinguish between headers and header fields. [58];h) Distinguish between octets and bytes. [58];5. a) How long are Ethernet MAC addresses? [60];b) What devices read Ethernet destination MAC addresses? [59];c) If the receiver detects an error on the basis of the value in the Frame Check Sequence field, what does it do? [60];d) Ethernet does error detection but not error correction. Is Ethernet a reliable protocol? Explain. [60];8. a) Why are sequence numbers good? [62];b) What are 1-bit fields called? [61];c) If someone says that a flag field is set, what does this mean? [61];d) If the ACK bit is set, what other field must have a value? [61, 63];e) What is the purpose of the acknowledgment number field? [61, 63];9. a) What are the four fields in a UDP header? [43];b) Describe the third. [43];c) Describe the fourth. [43];d) Is UDP reliable? Explain. [43];11. a) What is the syntax of a socket? [65];b) In Figure 2-13, when the client transmits to the webserver host, what is the source port number? [65];c) What is the destination port number? [65];d) What is the source socket? [65];e) What is the destination socket? [65];f) When the SMTP server transmits to the client host, what is the source port number? [65];g) What is the destination port number? [65];h) What is the source socket? [65];i) What is the destination socket? [65];12. a) Is the application layer standard always HTTP? [65-66];b) Which layer has the most standards? [65];c) At which layer would you find standards for voice over IP? (The answer is not explicitly in this section.) [65-66];d) Are all application layer standards simple like HTTP? [67];e) In HTTP response headers, what is the syntax of most lines (which are header fields)? [67];f) In HTTP request and response message, how is the end of a field indicated? [67];g) Do HTTP request messages have headers, data fields, and trailers?;h) Do HTTP response messages that deliver files have headers, data fields, and trailers? [67];18. a) What is encapsulation? [72];b) Why is encapsulation necessary for there to be communication between processes operating at the same layer but on different hosts, routers, or switches? [72];c) After the internet layer process in Figure 2-19 receives the TCP segment from the transport layer process, what two things does it do? [72-73];d) After the data link layer process in Figure 2-19 receives the IP packet from the internet layer process, what two things does it do? [72-73];e) After the physical layer process receives a frame from the data link layer process, what does the physical layer process do? [72-73];f) If encapsulation occurs on the source host, what analogous process do you think will occur on the destination host? (The answer is not in the text.) [72-73];19. a) What does a network standards architecture do? [75];c) What are the two dominant network standards architectures? [75];d) What is the dominant network standards architecture in most real firms today? [75];e) Are the two network standards architectures competitors? [75];23. a) Which layers of the hybrid TCP/IP?OSI standards architecture use OSI standards? [80];b) Which layers use TCP/IP standards? [80];c) Do wireless LAN standards come from OSI or TCP/IP? Explain. (The answer is not explicitly in this section.) [80];d) Do switched WAN standards come from OSI or TCP/IP? Explain. (Again, the answer is not explicitly in this section.) [80];*24. a) At which layers do OSI standards dominate usage? [80];b) Name and describe the functions of OSI Layer 5. [82];c) Name and describe the intended use of OSI Layer 6. [81];d) How is the OSI presentation layer actually used? [81];e) Beginning with the physical layer (Layer 1), give the name and number of the OSI layers. [80-81]

 

Paper#73179 | Written in 18-Jul-2015

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