Business Networks Chapter 2

52) Convert a decimal number 15 to the binary number. A) It is a binary number. B) 1100 C) 1101 D) 1111

D

7) A message's syntax is its ________. A) protocol B) message order C) meaning D) structure

D

28) How long are IPv4 addresses in octets? A) 4 octets B) 32 octets C) 48 octets D) 128 octets

A

29) To make a forwarding decision, a router looks at the arriving packet's ________. A) destination IP address B) destination EUI-48 address C) both A and B D) MAC addresses

A

31) TCP messages are called ________. A) segments B) fragments C) packets D) datagrams

A

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

A

37) 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

A

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

A

47) At which layer would you find standards for requesting videos from a video-sharing site such as YouTube? A) application B) transport C) Internet D) none of the above

A

15) After the side wishing to close a TCP connection sends a FIN segment, the other side will ________. A) not send any more segments B) only send ACK segments C) only send FIN segments D) none of the above

B

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

B

21) EUI-48 addresses are ________. A) 32 bits long B) 48 bits long C) 128 bits long D) Address length varies.

B

27) How long are IPv4 addresses? A) 4 bits B) 32 bits C) 48 bits D) 128 bits

B

30) IP is ________. A) reliable B) unreliable C) semi-reliable D) unreliable or reliable depending on the situation

B

32) TCP has six single-bit fields in headers and these single-bit fields are called ________ fields. A) port B) flag C) ACK D) binary

B

33) If someone says that a 1-bit flag is set, this means that it is given the value ________. A) 0 B) 1 C) either A or B D) neither A nor B

B

36) UDP is ________. A) reliable B) unreliable C) It depends on the situation. D) none of the above

B

39) 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

B

40) 2500 is in the range for ________ port numbers. A) well-known B) ephemeral C) both A and B D) neither A nor B

B

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

B

49) In HTTP, the end of a header field is usually indicated by a ________. A) bit position B) CRLF C) colon D) blank line

B

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

B

1) Internet standards are published as ________. A) RFCs B) IETFs C) TCP/IPs D) Internet Protocols

A

16) Which of the following is inside the header of messages? A) address field B) IP address field C) data field D) trailer

A

18) A message always has a ________. A) header B) data field C) both A and B D) neither A nor B

A

25) Ethernet does ________. A) error detection B) error correction C) both A and B D) neither A nor B

A

48) At which layer would you find file transfer protocol (FTP) standards for downloading files from an FTP server? A) application B) transport C) Internet D) none of the above

A

50) At what layer is encoding done? A) application B) transport C) Internet D) none of the above

A

8) In an HTTP, which one (browser or Webserver application program) transmits message first? A) browser B) Webserver application program C) They transmit simultaneously. D) It depends on the situation.

A

9) In HTTP, which program may initiate communication? A) browser B) Webserver program C) both A and B D) neither A nor B

A

10) 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

C

12) If the destination host receives a segment that has an error, it will ________. A) transmit an ACK segment B) transmit a NAC segment C) transmit an RSND segment D) none of the above

C

14) In a four-step close, which side transmits a FIN segment? A) the side that initiates the close B) the other side C) either side D) neither side

C

17) The ________ contains the content being delivered by a message. A) address field B) header C) data field D) trailer

C

19) Which part of a message is less often in a message compared to the other two parts? A) header B) data field C) trailer D) All of the above are commonly seen in all messages.

C

22) An EUI-48 address was formerly called a(n) ________ address. A) IPv4 B) IPv6 C) MAC D) DNS

C

23) ________ read(s) the destination address in an Ethernet frame. A) The destination host B) Switches in the network C) both A and B D) neither A nor B

C

26) In IP, the first bit in the second row is ________. A) 0 B) 31 C) 32 D) 63

C

3) Standards govern ________. A) semantics B) syntax C) both A and B D) neither A nor B

C

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

C

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

C

5) How a message is organized is its ________. A) protocol B) order C) syntax D) semantics

C

51) Convert the binary number 100 to decimal. A) It is in decimal. B) 2 C) 4 D) 8

C

6) A message's semantics is its ________. A) protocol B) message order C) meaning D) structure

C

11) If a destination host does not receive a segment, it will ________. A) transmit an ACK segment B) transmit a NAC segment C) transmit an RSND segment D) none of the above

D

13) A sending host will retransmit a TCP segment if it ________. A) receives an ACK segment B) receives a NAC segment C) receives an RPT segment D) none of the above

D

2) Standards mean the same thing as ________. A) semantics B) syntax C) rules D) protocols

D

24) If the destination host finds an error in an Ethernet frame, it ________. A) sends back a NAK B) sends back a ACK C) both A and B D) neither A nor B

D

4) The meaning of a message is referred to as the message's ________. A) protocol B) order C) syntax D) semantics

D

41) A codec ________. A) encodes voice sounds into digital signals for transmission B) encodes voice sounds into analog signals for transmission C) encrypts the signal D) converts binary voice signals into digital signals for transmission

D

42) Which of the following is a socket? A) 80 B) 21 C) both A and B D) neither A nor B

D

45) The application standard is almost always ________. A) HTTP B) TCP C) reliable D) None of the above is true.

D

46) Which of the following layers has more standards than the other three layers? A) data link B) Internet C) transport D) application

D