Which two characteristics are associated with UDP sessions
answer
Received data is unacknowledged.
Destination devices receive traffic with minimal delay.
.
question
What happens if part of an FTP message is not delivered to the destination?
answer
The part of the FTP message that was lost is re-sent.
question
A host device needs to send a large video file across the network while providing data communication to other users. Which feature will allow different communication streams to occur at the same time, without having a single data stream using all available bandwidth?
answer
multiplexing
question
What kind of port must be requested from IANA in order to be used with a specific application?
answer
registered port
question
What type of information is included in the transport header
answer
destination and source port numbers
question
What is a socket?
answer
the combination of a source IP address and port number or a destination IP address and port number
question
What is the complete range of TCP and UDP well-known ports?
answer
0 to 1023
question
Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?
answer
ACK
question
What is a characteristic of a TCP server process?
answer
There can be many ports open simultaneously on a server, one for each active server application.
question
Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices?
answer
SYN
ACK
question
A PC is downloading a large file from a server. The TCP window is 1000 bytes. The server is sending the file using 100-byte segments. How many segments will the server send before it requires an acknowledgment from the PC?
answer
10 segments
question
Which factor determines TCP window size?
answer
the amount of data the destination can process at one time
question
During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?
answer
the next byte that the destination expects to receive
question
What information is used by TCP to reassemble and reorder received segments?
answer
sequence numbers
question
What does TCP do if the sending source detects network congestion on the path to the destination?
answer
The source will decrease the amount of data that it sends before it must receive acknowledgements from the destination.
question
What is a characteristic of UDP?
answer
UDP reassembles the received datagrams in the order they were received.
question
What does a client do when it has UDP datagrams to send?
answer
It just sends the datagrams.
question
What happens if the first packet of a TFTP transfer is lost?
answer
The TFTP application will retry the request if a reply is not received.
question
A host device is receiving live streaming video. How does the device account for video data that is lost during transmission?
answer
The device will continue receiving the streaming video, but there may be a momentary disruption.
question
Why does HTTP use TCP as the transport layer protocol?
answer
because HTTP requires reliable delivery
question
When is UDP preferred to TCP?
answer
when an application can tolerate some loss of data during transmission
question
Which three application layer protocols use TCP?
answer
HTTP
SMTP
FTP
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