BUS 111 Ch 2

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

C) both A and B

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

C) data field

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) either side

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

D) None of the above is true.

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

D) application

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) neither A nor B

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) none of the above

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) none of the above

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

D) protocols

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

D) semantics

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

D) structure

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) "byte"

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) 1

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

B) 1000

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

B) 32 bits

52) An HTTP response message usually has a ________. A) trailer B) data field C) both A and B D) neither A nor B

B) data field

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) flag

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) only send ACK segments

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

B) unreliable

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

B) unreliable

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

A) 4

56) Which of the following is an integer? A) 4,307 B) 45.7 C) both A and B D) neither A nor B

A) 4,307

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

A) RFCs

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

A) address field

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) application

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) application

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

A) application

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) applications

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) browser

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

A) browser

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) destination IP address

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

A) error detection

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

A) header

51) An HTTP request message usually has a ________. A) header B) data field C) both A and B D) neither A nor B

A) header

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

A) segments

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

C) both A and B

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

C) 4

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

C) Meaning

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) SYN/ACK

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) both A and B

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

C) encoding

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

C) syntax

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) trailer

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) transmit an RSND segment

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

D) 1111