IS 435 Final

1) ISPs ________. A) carry traffic on the Internet B) connect users to the Internet C) both A and B D) neither A nor B

Both A and B

2) We call any device connected to the Internet a(n) ________. A) IP B) client C) router D) host

Host

3) Who owns the Internet? A) The U.S. Government B) The United Nations C) The IETF D) No one

No one

4) The IETF primarily ________.A) manages the Internet B) creates Internet standards C) coordinates the work of ISPs D) all of the above

Creates Internet Standards

5) When you use your tablet to access the internet, the tablet is a ________. A) client host B) server host C) both A and B D) neither A nor B

Client Host

6) What process adds a header in front of an application message or fragment? A) application B) transport C) internet D) data link

transport

7) What process adds a header in front of a TCP segment? A) Application B) Transport C) Internet D) Data Link

Internet

8) When a frame arrives, the data link process on the destination host ________. A) adds a header B) removes a header C) both A and B D) neither A nor B

Removes a header

9) The transport layer on the destination host ________. A) reassembles the application message if it has been fragmented B) removes the transport header C) both A and B D) neither A nor B

Both A and B

10) IPv4 addresses are ________ bits long. A) 32 B) 64 C) 128 D) none of the above

32

11) Routing is based on a(n) ________. A) IP address B) single-network address C) either A or B D) neither A nor B

IP address

12) Paths across a single network are called ________. A) routes B) data links C) physical links D) none of the above

Data links

13) If there are 10 routers between the source and destination hosts, how many transport processes will be involved on all devices? A) 1 B) 2 C) 10 D) 12

2

14) If there are 10 routers between the source and destination hosts, how many internet processes will be involved on all devices? A) 1 B) 2 C) 10 D) 12

12

15) Which of the following is an Internet supervisory protocol? A) DNS B) IP C) both A and B D) neither A nor B

DNS

16) In a point-to-point single network, how many physical links will there be when a packet is transmitted? A) 0 B) 1 C) 2 D) We cannot say with the information provided.

1

17) Which of the following is true? A) Frames are carried inside packets. B) Packets are carried inside frames. C) both A and B D) neither A nor B

Packets are carried inside frames

18) A host sends a packet to another host containing seven single networks along the way. How many other hosts will there be along the route when Host A transmits? A) 1 B) 2 C) 7 D) 9

1

19) A host sends a packet to another host containing six single networks along the way. How many data links are used for this transmission? A) 1 B) 6 C) 7 D) 8

6

20) A host sends a packet to another host containing six single networks along the way. How many routes are included in this transmission? A) 1 B) 6 C) 7 D) 8

1

21) A host sends a packet to another host with six single networks along the way. How many frames are involved? A) 1 B) 6 C) 7 D) 8

6

22) Source and destination EUI-48 (or MAC) addresses are found in ________ headers. A) IP B) frame C) TCP D) UDP

frame

23) ________ have DHCP servers. A) Home access routers B) Internet core routers C) both A and B D) neither A nor B

Home access routers

24) Internet standards are published as ________. A) RFCs B) IETFs C) TCPD) Internet Protocols

RFCs

25) Network standards provide ________. A) strobing B) synchronization C) interoperability D) entanglement

interoperability

26) Which standards agency is especially important for internet processes? A) ITU-T B) IETF C) Both A and B are about equally important. D) Neither A nor B is important.

IETF

27) A standards agency for OSI is ________. A) ITU-T B) IETF C) both A and B D) neither A nor B

ITU-T

28) Which layer governs wires? A) transport B) physical C) Internet D) none of the above

physical

29) Which standards layer governs e-mail? A) data link B) transport C) Internet D) none of the above

none of the above

30) Which standards layer governs multiuser word processing programs? A) data link B) transport C) Internet D) none of the Above

none of the above

31) Which layer(s) governs transmission through a single network? A) data link B) physical C) both A and B D) neither A nor B

both A and B

32) At what layer, will you find standards for routers? A) transport B) Internet C) both A and B D) neither A nor B

Internet

33) At what layer, will you find standards for access points? A) physical B) data link C) both A and B D) neither A nor B

both A and B

34) At what layer, will you find standards for switches? A) application B) data link C) transport D) Internet

data link

35) At what layer, will you find standards for frames? A) application B) data link C) transport D) Internet

data link

36) At what layer, will you find standards for IP addresses? A) application B) data link C) transport D) Internet

Internet

37) At what layer, will you find standards for routes? A) application B) data link C) transport D) Internet

Internet

38) At what layer, will you find standards for EUI-48 addresses? A) application B) data link C) transport D) Internet

Data link

39) If two hosts are connected by five networks, how many packets will there be when one host sends a packet to the other host? A) 1 B) 2 C) 5 D) 7

1

40) If two hosts are connected by five networks, how many routers will there be when one host sends a packet to the other host? A) 1 B) 2 C) 4 D) 5

4

41) If two hosts are connected by five switches, how physical links will there be when one host sends a packet to the other host? A) 1 B) 2 C) 5 D) 6

6

42) Host P transmits a SYN segment to Host Q. If host Q is willing to open the connection, it will transmit a(n) ________ segment. A) ACK B) SYN C) SYN\ACK D) none of the above

SYN\ACK

43) If a destination host receives a TCP segment with an error, it will transmit ________. A) an ACK segment B) an NAC segment C) an RSND segment D) nothing

Nothing

44) If a destination host receives a correct segment, it will transmit ________. A) an ACK segment B) an NAC segment C) an RSND segment D) nothing

an ACK segment

45) In a four-step close, which side transmits a FIN segment? A) the side that initiates the close B) the side that does not initiate the close C) both A and B D) neither A nor B

both A and B

46) Which of the following is NOT one of the three general parts of messages? A) address field B) header C) data field D) trailer

address field

47) If the destination internet process detects an error, it ________. A) discards the packet B) sends back a segment notifying the sender C) both A and B D) neither A nor B

discards the packet

48) Which of the following is a connectionless protocol? A) IP B) TCP C) both A and B D) neither A nor B

IP

49) If someone says that a 1-bit flag is set, it is given the value ________. A) 0 B) 1 C) either 0 or 1 D) neither 0 or 1

1

50) The UDP header has ________ fields. A) 4 B) 8 C) 16 D) 32

4

51) UDP ________. A) is unreliable B) has a checksum field C) both A and B D) neither A nor B

both A and B

52) On a server, well-known port numbers indicate ________. A) applications B) connections with client computers C) both A and B D) neither A nor B

applications

53) The range of port 1024 to port 4999 is the usual range for ________ port numbers. A) well-known B) ephemeral C) both A and B D) neither A nor B

ephemeral

54) The source socket is 60.171.18.22:2707. The source is a(n) ________. A) client B) server C) well-known server D) ephemeral server

client

55) The destination socket is 60.171.18.22:161. The destination host is a(n) ________. A) client B) server C) well-known server D) ephemeral server

server

56) "Octet" is the same as ________. A) "bit" B) "byte" C) either A or B, depending on the context D) neither A nor B

byte

57) Ethernet has a Frame Check Sequence Field to check for errors. Ethernet is ________. A) reliable B) unreliable C) both A and B D) neither A nor B

unreliable

58) Converting application messages into bits is called ________. A) encapsulation B) encryption C) encoding D) exchange

encoding

59) Transmitting "Oh, My!" without the quotes in ASCII requires ________ octets. A) 2 B) 4 C) 6 D) 7

7

60) Convert decimal 8 to binary. A) 100 B) 1000 C) 10000 D) 111

1000

61) A 5-bit field can represent ________ alternatives or different combinations. A) 8 B) 16 C) 32 D) 64

32

62) To represent 65 alternatives, your alternatives field would have to be at least ________ bits long. A) 5 B) 6 C) 7 D) 8

7

63) The five senses can be represented with a ________-bit field. A) 2 B) 3 C) 4 D) 5

3

64) In QoS, the S stands for ________. A) software B) security C) service D) satisfaction

service

65) QoS is quantified through ________. A) criteria B) consensus C) metrics D) none of the above

metrics

66) Transmission speed is normally measured in ________. A) bits per second B) bytes per second C) octets per second D) none of the above

bits per second

67) Throughput is ________. A) the speed a network actually provides to users B) a network's rated speed C) both A and B D) neither A nor B

the speed a network actually provides to users

68) In a coffee shop hot spot, the rated speed is 10 Mbps. Throughput is about half of the rated speed. There are ten people using the hot spot. If you and three others are transmitting or receiving at the same time, what speed should you expect to get? A) 0.5 Mbps B) 1 Mbps C) 1.25 Mbps D) none of the above

1.25 Mbps

69) In a coffee shop, there are ten people sharing an access point with a rated speed of 2Gbps. The throughput is half the rated speed. If each person downloading is getting an average of 200Mbps, how many people are using the Internet at that moment? A) 10 B) 5 C) 2 D) none of the above

5

70) Trunk lines in the Internet core are ________. A) dedicated B) multiplexed C) both A and B D) neither A nor B

multiplexed

71) The business benefit of multiplexing is ________. A) lower cost B) higher speed C) avoiding the need to send many transmission links through narrow conduits D) security

lower cost

72) ________ is the percentage of time that a network is available for use. A) Availability B) Downtime C) QoS D) none of the above

availability

73) When a packet travels through a network, the time it takes to get from the sender to the receiver is called ________. A) latency B) output C) jitter D) throughput

latency

74) Variability in delay is called ________. A) jitter B) variance C) a QoS failure D) latency

jitter

75) Guarantees for quality of service are called ________. A) QoS-G B) QoS metrics C) SLAs D) QoS guarantees

SLAs

76) An SLA specifies the ________. A) best case B) worst case C) both A and B D) neither A nor B

worst case

77) An SLA specifies ________. A) maximum speed B) minimum speed C) both A and B D) neither A nor B

minimum speed

78) An SLA specifies ________. A) maximum latency B) minimum latency C) both A and B D) neither A nor B

maximum latency

79) ISPs usually offer QoS guarantees to ________. A) residential customers B) business customers C) both A and B D) neither A nor B

business customers

80) ________ can be addressed by using priority. A) Chronic lacks of capacity B) Momentary traffic peaks C) both A and B D) neither A nor B

momentary traffic peaks

81) Momentary traffic peaks can lead to ________. A) latency B) packet loss C) both A and B D) neither A nor B

both A and B

82) To handle momentary traffic peaks, which would you give higher priority to? A) e-mail B) VoIP C) both A and B D) It is impossible to say with the information provided.

VoIP

83) Traffic shaping may ________ traffic that is undesirable. A) prohibit B) limit C) both A and B D) neither A nor B

both A and B

84) SNMP agents communicate with the ________. A) network visibility program B) network management program C) MIB D) all of the above

network management program

85) To determine if a host is reachable, you send a(n) ________. A) SNMP SET command B) MIB C) trap D) ping

ping

86) Ping tells you ________. A) that a host is reachable B) latency in the connection to the host C) both A and B D) neither A nor B

both A and B

87) SNMP Set commands can ________. A) ask agents for information about the managed device B) change router operation C) both A and B D) neither A nor B

change router operation

88) SNMP Get commands can ________. A) ask agents for information about the managed device B) change router operation C) both A and B D) neither A nor B

ask agents for information about the managed device

89) The SNMP manager stores the information it receives from Get commands ________. A) in the MIB B) on the agent C) on the managed device D) in the cloud

in the MIB

90) Using the SNMP Set command ________. A) saves management labor B) requires excellent security C) both A and B D) neither A nor B

both A and B

91) Using standard configurations ________. A) saves money B) gives management agility C) both A and B D) neither A nor B

saves money

92) SDN can ________. A) permit routing rules to be changed rapidly B) reduce router costs C) both A and B D) neither A nor B

both A and B

93) Creating switching and routing tables is an example of ________. A) forwarding B) routing complexity C) hardwiring D) control

control

94) Routing packets is an example of ________. A) forwarding B) routing complexity C) hardwiring D) control

forwarding

95) The general term for evil software is ________. A) virus B) worm C) malware D) all of the above

malware

96) ________ is the general name for a security flaw in a program. A) A virus B) Malware C) A security fault D) A vulnerability

a vulnerability

97) Users typically can eliminate a vulnerability in one of their programs by ________. A) installing a patch B) using an antivirus program C) both A and B D) neither A nor B

installing a patch

98) Vulnerability-based attacks that occur before a patch is available are called ________ attacks. A) indefensible B) stealth C) malware D) zero-day

zero-day

99) What kind of attack is most likely to succeed against a system with no technological vulnerabilities? A) malware B) social engineering C) both A and B D) neither A nor B

social engineering

100) ________ are full programs. A) Viruses B) Worms C) both A and B D) neither A nor B

worms