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Test Item File

Module A

More on TCP and IP A-1.

To decide what process should receive the contents of the data field of an IP packet, the internet layer process looks at the _____ field. a. destination port number b. source IP address c. destination IP address d. protocol* e. application Difficulty: Easy Section Reference: A.1a Page Reference: 472

A-2.

To decide what process should receive the contents of the data field of a TCP segment, the transport layer process looks at the _____ field. a. destination port number* b. source IP address c. destination IP address d. protocol e. application Difficulty: Easy Section Reference: A.1b Page Reference: 472

A-3.

A TCP segment begins with octet 8,658 and ends with octet 12,783. What number does the sending host put in the sequence number field? a. 8,657 b. 8,658* c. 8,659 d. 12,783 Copyright Š 2009 Pearson Education, Inc. Publishing as Prentice Hall

A-1


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e.

12,784

Difficulty: Moderate Section Reference: A.2 Page Reference: 475 A-4.

A TCP segment begins with octet 8,658 and ends with octet 12,783. What number does the receiving host put in the acknowledgment number field of the TCP segment that acknowledges this TCP segment? a. 8,657 b. 8,658 c. 8,659 d. 12,783 e. 12,784* Difficulty: Moderate Section Reference: A.2 Page Reference: 475

A-5.

A TCP segment carries data octets 456 through 980. The following TCP segment is a supervisory segment carrying no data. What value is in the sequence number field of the latter TCP segment? a. 456 b. 457 c. 980 d. 981* e. We cannot say. Difficulty: Difficult Section Reference: A.3 Page Reference: 475

A-6.

Flow control in TCP depends on the _____ field. a. acknowledgement number b. window size c. Both A and B* d. Neither A nor B Difficulty: Easy Section Reference: A.4 Page Reference: 477

A-7.

In TCP fragmentation, what is fragmented? a. The application layer message* b. The transport layer message c. The internet layer message

Copyright Š 2009 Pearson Education, Inc. Publishing as Prentice Hall

A-2


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d.

All of the above.

Difficulty: Moderate Section Reference: A.5a Page Reference: 477 A-8.

In TCP fragmentation, what software process does reassembly? a. The application layer process on the source host b. The application layer process on the destination host c. The transport layer process on the source host d. The transport layer process on the destination host* e. An internet layer process Difficulty: Moderate Section Reference: A.5c Page Reference: 477

A-9.

A transport process announces an MSS of 1,024. If there are no options, how big can IP packets be? a. 536 b. 556 c. 576 d. 1,024 e. 1,064* Difficulty: Difficult Section Reference: A.6 Page Reference: 477-478

A-10. There is a mask 1010. There is a number 1100. What is the result of masking the number? a. 1010 b. 1100 c. 0010 d. 1000* e. 1110 Difficulty: Moderate Section Reference: A.7 Page Reference: 479 A-11. The following router forwarding table entry has the prefix /14 and the address part 10101010 10100001 10000000 10000000 (170.160.0.0). Which of the following would constitute a match? a. 10101010 00000000 00000000 00000000 b. 10101010 10100000 00000000 00000000* c. 10101010 10100001 00000000 00000000

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d. e.

10101010 10100001 10000000 00000000 10101010 10100001 10000000 10000000

Difficulty: Difficult Section Reference: A.8 Page Reference: 480 A-12. IP version 6 will offer _____. a. larger address fields to allow more IP addresses b. a good way to add extension headers c. Both A and B* d. Neither A nor B Difficulty: Moderate Section Reference: A.9 Page Reference: 480-482 A-13. An IP address is A173:0000:0000:0000:23B7:0000:CD12:A84B. In compact form this is A173:23B7:CD12:A84B. a. True b. False* Difficulty: Difficult Section Reference: A.10 Page Reference: 451 A-14. When an IP packet reaches a router that wishes to send the packet on to a subnet whose MTU is longer than the IP packet, what happens? Read carefully. a. The router fragments the packet. b. The subnet fragments the packet. c. Both the router and the subnet fragment the packet. d. The packet is not fragmented.* Difficulty: Moderate Section Reference: A.11a Page Reference: 482 A-15. When an IP packet reaches a router that wishes to send the packet on to a subnet whose MTU is shorter than the IP packet, what happens? a. The router fragments the packet.* b. The subnet fragments the packet. c. Both the router and the subnet fragment the packet. d. The network fragments the packet. Difficulty: Easy Section Reference: A.11b

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A-4


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Page Reference: 482 A-16. _____ fragmentation takes place on the source host. a. IP b. TCP* c. Both A and B d. Neither A nor B Difficulty: Difficult Section Reference: A.12b Page Reference: 477, 482 A-17. What program on what computer does reassembly occur if IP packets are fragmented? a. Transport process on the destination host. b. Internet layer process on the destination host.* c. Internet layer process on a router. d. Data link layer process on a router. e. Data link layer process on the destination host. Difficulty: Moderate Section Reference: A.13a Page Reference: 482 A-18. Within an autonomous system, the organization can choose whatever routing protocol it wishes. a. True.* b. False. Difficulty: Easy Section Reference: A.14 Page Reference: 482 A-19. Which of the following is an interior routing protocol? a. RIP.* b. BGP. c. Both A and B. d. Neither A nor B. Difficulty: Easy Section Reference: A.15 Page Reference: 486 A-20. Which of the following is a distance vector routing protocol? a. RIP.* b. OSPF.

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c. d.

Both A and B.* Neither A nor B.

Difficulty: Moderate Section Reference: A.15 Page Reference: 486 A-21. Which of the following sends its messages to hosts as well as to routers? a. RIP.* b. OSPF. c. Both A and B. d. Neither A nor B. Difficulty: Difficult Section Reference: A.15 Page Reference: 485 A-22. Which of the following only transmits updates? a. RIP. b. OSPF.* c. Both A and B. Difficulty: Difficult Section Reference: A.15 Page Reference: 487 A-23. Which of the following has good scalability? a. RIP. b. OSPF.* c. Both A and B. d. Neither A nor B. Difficulty: Moderate Section Reference: A.15 Page Reference: 487 A-24. Which of the following is delivered reliably? a. RIP. b. OSPF. c. Both A and B. d. Neither A nor B.* Difficulty: Difficult Section Reference: A.15 Page Reference: 487

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A-25. A router sends an ARP message in order to find the _____ address of a destination host on a LAN. a. IP b. MAC* c. Both A and B Difficulty: Easy Section Reference: A.16b Page Reference: 488 A-26. A host wishes to send an IP packet to a router on its subnet. It knows the router’s IP address. The internet layer packet it sends will be _____. a. a RARP request b. an ARP request* c. an IP packet d. an ICMP echo request e. a routing protocol message Difficulty: Easy Section Reference: A.16c Page Reference: 489 A-27. A router sends an ARP message to find the address of a destination host on a LAN subnet. The MAC layer address of the router is in the MAC destination address field of the _____. a. frame carrying the ARP request message b. frame carrying the ARP response message* c. Both A and B d. Neither A nor B Difficulty: Difficult Section Reference: A.16c Page Reference: 489 A-28. In an ARP request message, the _____ address is all ones. a. IP address b. MAC address* c. Both of the above. d. Neither A nor B Difficulty: Moderate Section Reference: A.17a Page Reference: 491 A-29. Which of the following needs a mask to know the size of the network part in an IP address?

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a. b. c. d.

classful IP addressing CIDR* Both of the above. Neither A nor B

Difficulty: Moderate Section Reference: A.18 Page Reference: 491 A-30. What class of network would have the following IP address? 11001100111111110000000010101010. a. A b. B c. C* d. D e. E Difficulty: Difficult Section Reference: A.19 Page Reference: 492 A-31. Multicasting is used because _______. a. it allows a source host to reach many destination hosts in a short time b. it reduces traffic* Difficulty: Easy Section Reference: A.20a Page Reference: 492 A-32. Multicasting _____. a. is supported by Class A addresses b. is supported by Class B addresses c. is supported by Class C addresses d. is supported by Class D addresses* e. is not supported within the Classful addressing system Difficulty: Easy Section Reference: A.20b Page Reference: 492 A-33. In mobile IP, a traveling notebook computer will have a_____. a. permanent home IP address b. temporary IP address at the site c. Both A and B* d. Neither B nor B

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Difficulty: Moderate Section Reference: A.21 Page Reference: 353

Copyright Š 2009 Pearson Education, Inc. Publishing as Prentice Hall

A-9

Test bank business data networks and telecommunications 7th edition panko  

test bank business data networks and telecommunications 7th edition panko. Full file at http://testbank360.eu/test-bank-business-data-n...

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