Mod. 14 Quiz
Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two) a) PSH b) FIN c) ACK d) SYN e) RST f) URG
SYN , ACK
What is a characteristic of a TCP server process? a) Every application process running on the server has to be configured to use a dynamic port number. b) There can be many ports open simultaneously on a server, one for each active server application. c) A host running two different applications can have both configured to use the same server port. d) An individual server can have two services assigned to the same port number within the same transport layer services.
There can be many ports open simultaneously on a server, one for each active server application.
What information is used by TCP to reassemble and reorder received segments? a) sequence numbers b) acknowledgement numbers c) fragment numbers d) port numbers
a) sequence numbers
Which factor determines TCP window size? a) the amount of data the destination can process at one time b) the amount of data to be transmitted c) the number of services included in the TCP segment d) the amount of data the source is capable of sending at one time
a) the amount of data the destination can process at one time
What does TCP do if the sending source detects network congestion on the path to the destination? a) The destination will request retransmission of the entire message. b) The source will decrease the amount of data that it sends before it must receive acknowledgements from the destination. c) The source host will send a request for more frequent acknowledgments to the destination. d) The source will acknowledge the last segment that is sent and include a request for a smaller window size in the message.
b) The source will decrease the amount of data that it sends before it must receive acknowledgements from the destination.
Why does HTTP use TCP as the transport layer protocol? a) because HTTP is a best-effort protocol b) because HTTP requires reliable delivery c) to ensure the fastest possible download speed d) because transmission errors can be tolerated easily
b) because HTTP requires reliable delivery
What type of information is included in the transport header? a) encoded application data b) destination and source physical addresses c) destination and source port numbers d) destination and source logical addresses]
b) destination and source physical addresses
What is a characteristic of UDP? a) Applications that use UDP are always considered unreliable. b) UDP only passes data to the network when the destination is ready to receive the data. c) UDP reassembles the received datagrams in the order they were received. d) UDP datagrams take the same path and arrive in the correct order at the destination.
c) UDP reassembles the received datagrams in the order they were received.
What is a socket? a) the combination of the source and destination IP address and source and destination Ethernet address b) the combination of the source and destination sequence and acknowledgment numbers c) the combination of the source and destination sequence numbers and port numbers d) the combination of a source IP address and port number or a destination IP address and port number
d) the combination of a source IP address and port number or a destination IP address and port number
When is UDP preferred to TCP? a) when all the data must be fully received before any part of it is considered useful b) when a client sends a segment to a server c) when segments must arrive in a very specific sequence to be processed successfully d) when an application can tolerate some loss of data during transmission
d) when an application can tolerate some loss of data during transmission
