Q&A Hero

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

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

Q: How many bytes will it take to transmit "Brain Dead" without the quotation marks? A) 2 B) 3 C) 9 D) none of the above

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

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

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

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

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

Q: In HTTP headers, the end of a header field is usually indicated by a ________. A) . B) : C) ; D) none of the above

Q: 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

Q: 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

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

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

Q: 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

Q: 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

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

Q: 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

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

Q: 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

Q: For every conversation, a client randomly generates an ephemeral port number for ________. A) applications B) conversations C) both A and B D) neither A nor B

Q: 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

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

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

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

Q: 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

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

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

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

Q: 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

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

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

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

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

Q: 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

Q: ________ 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

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

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

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

Q: 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.

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

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

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

Q: 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

Q: 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

Q: 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

Q: 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

Q: 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

Q: 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

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

Q: 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.

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

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

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

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

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

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

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

Q: When the source host transmits a packet, the packet is addressed to the ________. A) destination host B) first switch C) first router D) destination application

Q: When the source host transmits a frame, the frame is addressed to the ________. A) destination host B) first switch C) first router D) destination application

Q: If a host wishes to transmit packets to another host, it must find the other host's ________. A) IP address B) host name C) both A and B D) neither A nor B

Q: Which of the following is a host's official address on the Internet? A) its IP address B) its host name C) both A and B D) neither A nor B

Q: Which of the following layers governs internet transmission? A) data link layer B) transport layer C) both A and B D) neither A nor B

Q: OSI standards are dominant at the ________. A) data link layer B) physical layer C) both A and B D) neither A nor B

Q: Which of the following is NOT a standards organization? A) ISO B) OSI C) IETF D) All of the above are standards organizations.

Q: Application message reassembly is done on the ________. A) source host B) destination host C) both A and B D) neither A nor B

Q: Application message fragmentation is done on the ________. A) source host B) destination host C) both A and B D) neither A nor B

Q: In the Five General Layers Standard, which layer's standards govern application World Wide Web exchanges over the Internet? A) 2 B) 3 C) 4 D) 5

Q: In the Five General Layers Standard, which layer's standards govern application message fragmentation? A) 2 B) 3 C) 4 D) 5

Q: Which layer's standards govern router operation? A) 1 B) 2 C) 3 D) 4

Q: Which layer's standards govern delivering frames? A) 1 B) 2 C) both A and B D) neither A nor B

Q: Which layer's standards govern signaling? A) 1 B) 2 C) 3 D) 4

Q: What layer number is the data link layer? A) 1 B) 2 C) 3 D) 4

Q: What layer number is the Internet layer? A) 1 B) 2 C) 3 D) 4

Q: What layer number is the physical layer? A) 1 B) 2 C) 3 D) 4

Q: What layer number is the transport layer? A) 1 B) 2 C) 3 D) 4

Q: Standards tend to bring _________. A) interoperability B) higher prices C) both A and B D) neither A nor B

Q: Packets are ________. A) switched B) routed C) both A and B D) neither A nor B.

Q: At what layer would you find routers? A) 1 B) 2 C) 3 D) 4

Q: At what layer would you find switches? A) 1 B) 2 C) 3 D) 4

Q: At what layer would you find wire connections? A) 1 B) 2 C) 3 D) 4