MIS 3317 Chapter 8

23) There is a row for each host address in a(n) ________. A) routing table B) Ethernet switching table C) both A and B D) neither A nor B

B) Ethernet switching table

73) Which has a better system for handling options beyond the main header? A) IPv4 B) IPv6 C) Both use the same method. D) Neither can handle options.

B) IPv6

25) If no other row matches, the router will select the ________ row as its best match. A) First B) Last C) either A or B, depending on the circumstances D) neither A nor B

B) Last

17) In the mask 255.255.255.0, how many 1s are there? A) 8 B) 16 C) 24 D) 48

C) 24

58) In IPv6 addresses before simplification, there are ________ in a field. A) 2 symbols B) 8 bits C) both A and B D) neither A nor B

D) neither A nor B

8) The network part of an IPv4 address is ________ bits long. A) 8 B) 16 C) 32 D) 64

A) 8

82) Four-way closes use ________ segments. A) FIN B) RST C) either A or B D) neither A nor B

A) FIN

71) Which of the following checks for errors in the packet header? A) IPv4 B) IPv6 C) both A and B D) neither A nor B

A) IPv4

24) For 100,000 addresses, which will have fewer rows? A) a routing table B) an Ethernet switching table C) Both will be about the same number of rows.

A) a routing table

43) The main version of Internet Protocol in use today is IP version ________. A) 1 B) 4 C) 5 D) 6

B) 4

54) Simplification of IPv6 addresses must be standardized ________. A) to maximize text compression B) for the retrieval of IPv6 addresses in text fields of documents and spreadsheets C) both A and B D) neither A nor B

B) for the retrieval of IPv6 addresses in text fields of documents and spreadsheets

56) For human reading, IPv6 addresses are written in ________ notation. A) dotted decimal B) hexadecimal C) binary D) all of the above

B) hexadecimal

55) In IPv6 address simplification, text characters are expressed in ________. A) upper case B) lower case C) either A or B D) neither A nor B

B) lower case

12) A border router connects different IP ________. A) subnets B) networks C) both A and B D) neither A nor B

B) networks

31) A(n) ________ must find the best-matching row in its ________ table by comparing multiple row matches. A) Ethernet switch; switching B) router; routing C) both A and B D) neither A nor B

B) router; routing

4) DNS is a ________ protocol. A) packet delivery B) supervisory C) both A and B D) neither A nor B

B) supervisory

2) TCP/IP standards are set at the ________. A) physical layer B) transport layer C) both A and B D) neither A nor B

B) transport layer

41) In decision cashing, when 20 packets arrive to the same destination IP address, the router will ________. A) go through all three steps for each B) use the decision it made for the first one C) send them via different routers to create load balancing along different routes D) none of the above

B) use the decision it made for the first one

19) Express the mask /24 in dotted decimal notation. A) 255.0.0.0 B) 255.255.0.0 C) 255.255.255.0 D) none of the above

C) 255.255.255.0

67) The packets in an IPv6 flow are handed ________. A) sequentially B) in parallel C) in ripples D) identically

C) in ripples

10) In the IPv4 address 1.2.3.4, what is the network part? A) 1 B) 1.2 C) 1.2.3 D) We cannot say.

D) We cannot say.

80) If someone says that a 1-bit flag is not set, this means its value is ________. A) 0 B) 1 C) blank D) We cannot say.

A) 0

61) If I simplify the address 2001:0000:0000:00fe:0000:0000:0000:cdef, I get ________. A) 2001:0:0:fe::cdef B) 2001::fe:0:0:0:cdef C) 2001:0:0:fe:0:0:0:cdef D) 2001::00fe:0::cdef

A) 2001:0:0:fe::cdef

62) If I simplify the address 2001:0ed2:056b:00d3:00c0:abcd:0bcd:0fe0, I get ________. A) 2001:ed2:56b:d3:c0:abcd:bcd:0fe0 B) 2001:ed2:56b:d3:c:abcd:bcd:0fe C) either A or B D) neither A nor B

A) 2001:ed2:56b:d3:c0:abcd:bcd:0fe0

33) Row 2707 has the mask /16 and the cost metric 20. Row 4400 has the mask /14 and the cost metric 10. The default row has a metric cost of 2. Which row will the router choose if both are matches? A) 2707 B) 4400 C) 2 D) impossible to determine

A) 2707

60) How many fields are there in an IPv6 address written for human reading? A) 8 B) 16 C) 32 D) 128

A) 8

44) In IPv4, the ________ field is used to deal with congestion in the Internet. A) ECN B) DiffServ C) time to live D) header checksum

A) ECN

81) A TCP ________ segment is a request to the other transport process to close a connection. A) FIN B) ACK C) CLS D) SYN

A) FIN

84) Which of the following segments types is acknowledged? A) FIN B) RST C) Both of the above are acknowledged. D) Neither A nor B is acknowledged.

A) FIN

46) Which of the following allows packet fragmentation? A) IPv4 B) IPv6 C) both A and B D) neither A nor B

A) IPv4

85) Which of the following can handle an application message that is one megabyte in size? A) TCP B) UDP C) both A and B D) neither A nor B

A) TCP

28) A packet arrives at a router with destination IP address 128.171.3.2. Row 47 has the destination value 128.171.0.0. Is Row 47 a match? A) Yes B) No C) impossible to determine

A) Yes

40) If a router receives 20 packets in a row going to the same destination IP address, the standard calls for it to ________. A) go through all three steps for each B) use the decision it made for the first one C) send them via different routers to create load balancing along different routes D) none of the above

A) go through all three steps for each

75) If you see 0 in the Next Header Field of a header, what will follow this header? A) hop-by-hop options B) destination options C) mobility header D) none of the above

A) hop-by-hop options

72) Using a header checksum field to check for errors ________. A) increases routing time B) decreases routing time C) makes the protocol reliable D) checks the entire packet to look for errors

A) increases routing time

15) In a network mask, the 1s correspond to the ________. A) network part B) subnet part C) host part D) Internet part

A) network part

3) UDP is a standard for ________. A) packet delivery B) supervision C) both A and B D) neither A nor B

A) packet delivery

1) Ethernet standards are set at the ________. A) physical layer B) transport layer C) both A and B D) neither A nor B

A) physical layer

42) Decision caching ________. A) reduces routing costs B) is safe C) both A and B D) neither A nor B

A) reduces routing costs

22) In a routing table, a ________ represents a route for a group of IP addresses. A) row B) column C) schema D) metric

A) row

27) A packet arrives at a router with destination IP address 62.17.3.2. Row 47 has the destination value 62.17.4.0. Is Row 47 a match? A) Yes B) No C) impossible to determine

B) No

83) An abrupt close uses a ________ segment. A) FIN B) RST C) either A or B D) neither A nor B

B) RST

29) The first step in the routing process involves ________. A) selecting the best match row B) comparing the packet's destination IP address to all rows C) comparing the packet's destination IP address to matching rows D) selecting an interface

B) comparing the packet's destination IP address to all rows

69) In IPv6, the payload length gives the number of octets in the ________. A) entire packet B) entire packet minus the main header C) entire packet minus the main and extension headers D) entire packet minus the extension headers

B) entire packet minus the main header

78) One-bit fields are called ________ fields. A) SYN B) flag C) ACK D) none of the above

B) flag

63) If I simplify the IPv4address 2001:0000:0000:00fe:3270:0000:0000:cdef., I get ________. A) 2001:0:0:00fe:3270:0:0:cdef B) 2001::00fe:3270:0:0:cdef C) 2001:0:0:00fe:3270::cdef D) 2001::00fe:3270::cdef

C) 2001:0:0:00fe:3270::cdef

35) Deciding what interface and to what device to send the packet back out is step ________ in the routing process. A) 1 B) 2 C) 3 D) none of the above.

C) 3

14) A mask has ________ bits. A) 8 B) 16 C) 32 D) 64

C) 32

9) The total length of an IPv4 address is ________ bits. A) 8 B) 16 C) 32 D) 64

C) 32

64) Which RFC standardizes how to write IPv6 addresses in canonical form? A) RFC 791 B) RFC 2707 C) RFC 5952 D) RFC 7600

C) RFC 5952

76) The terms payload and data field ________ in IPv6. A) are synonymous B) have nothing in common C) are related but different D) none of the above

C) are related but different

37) In the final step, the router sends the packet ________. A) to a particular device B) out a particular interface C) both A and B D) neither A nor B

C) both A and B

57) In IPv6 addresses before simplification, there are ________ in a field. A) 4 symbols B) 16 bits C) both A and B D) neither A nor B

C) both A and B

39) If the next-hop router field in the best-match row says "local", the router should address the packet to the ________. A) local router B) default router C) destination host D) none of the above.

C) destination host

36) Router ports are called ________. A) sockets B) plugs C) interfaces D) ports

C) interfaces

5) Router sockets for wire and optical fiber cords are called ________. A) sockets B) plugs C) interfaces D) ports

C) interfaces

21) The Internet is organized in a ________. A) hierarchy B) ring C) mesh D) none of the above

C) mesh

32) If any row other than the default row matches an IPv4 address, the router will ________. A) always choose the default row B) sometimes choose the default row C) never choose the default row D) impossible to determine

C) never choose the default row

68) IPv6 uses ________ to know the packet length. A) header length fields B) total length fields C) payload lengths D) hop limits

C) payload lengths

66) The diffserv field in IPv4 is for ________. A) congestion B) compression C) quality of service D) options

C) quality of service

6) For cost reasons, you should ________ where you can, ________ where you must. A) switch; switch B) route; route C) switch; route D) route; switch

C) switch; route

77) Sequence numbers are ________ bits long. A) 8 B) 16 C) 24 D) 32

D) 32

79) TCP has ________ flag field(s). A) 1 B) 2 C) 6 D) 9

D) 9

74) ________ are the only extension headers that all routers must consider. A) Destination options B) Mobility headers C) Encapsulating security protocol headers D) Hop-by-hop options

D) Hop-by-hop options

50) Which is a problem with IPv4 addresses? A) They are incompatible with wireless devices. B) They are too complex. C) Routers find it difficult to handle them. D) We have run out of them.

D) We have run out of them.

16) In a subnet mask, the 1s correspond to the ________. A) network part B) subnet part C) host part D) all of the above

D) all of the above

38) The next-hop router listed in the last row is the ________ router. A) local B) best-match C) socket D) default

D) default

26) In a routing table, Rows 47 and 3497 both match the destination IP address of an arriving packet's IP address. What row will the router look at first when trying to find matching rows? A) 1 B) 47 C) 3497 D) the default row

A) 1

30) The second step in the routing process involves ________. A) selecting the best-match row B) comparing the packet's destination IP address to all rows C) comparing the packet's destination IP address to matching rows D) selecting an interface

A) selecting the best-match row

53) IPv6 addresses help to ________. A) simplify writing B) simplify memorization C) both A and B D) neither A nor B

A) simplify writing

7) Which of the following is one of the three parts of an IPv4 address? A) subnet part B) subnet mask C) both A and B D) neither A nor B

A) subnet part

47) A router will discard a packet if the Time to Live (TTL) value in an arriving packet is ________. A) 0 B) 1 C) 254 D) 256

B) 1

34) Row 2707 has the mask /16 and the reliability metric 20. Row 4400 has the mask /16 and the reliability metric 10. Which row will the router choose if both are matches? A) 2707 B) 4400 C) either A or B D) The router will choose the default row.

B) 4400

86) The maximum application message size when UDP is used at the transport layer is approximately ________. A) 16,000 bytes B) 64,000 bytes C) 1 million bytes D) none of the above

B) 64,000 bytes

13) An internal router connects different IP ________. A) subnets B) networks C) both A and B D) neither A nor B

A) subnets

11) If you see an IPv4 address, what do you know for certain? A) the total length B) the length of the network part C) both A and B D) neither A nor B

A) the total length

65) The version number field in IPv6 has the value ________. A) 0001 B) 0100 C) 0101 D) 0110

D) 0110

59) In IPv6 addresses, ________ are separated by ________. A) segments; dots B) segments; colons C) fields; dots D) fields; colons

D) fields; colons

18) In the mask /14, how many 1s are there? A) 8 B) 16 C) 24 D) none of the above

D) none of the above

20) Express the mask /18 in dotted decimal notation. A) 255.0.0.0 B) 255.255.0.0 C) 255.255.255.0 D) none of the above

D) none of the above

49) The version of Internet Protocol that is growing rapidly is IP version ________. A) 1 B) 2 C) 4 D) none of the above

D) none of the above

52) What is pushing IPv6 adoption now? A) pressure from ISPs B) pressure from the IETF C) pressure from ISO D) none of the above

D) none of the above

70) The hop limit field in IPv6 corresponds to the ________ field in IPv4 A) header checksum B) protocol C) length D) none of the above

D) none of the above

45) the identification field in IPv4 is used for ________. A) route fragmentation B) frame fragmentation C) application message fragmentation D) packet fragmentation

D) packet fragmentation

48) In an IPv4 packet, the ________ field value tells the type of message contained in the IP packet's data field. A) data B) next-hop C) next-header D) protocol

D) protocol

51) The main benefit of IPv6 over IPv4 is ________. A) having two more bits in the IP address B) having two more bytes in the IP address C) the ability to have quality-of-service guarantees D) the ability to support more hosts

D) the ability to support more hosts