CCNA 1 Chapter 9 Studyguide
What is the complete range of TCP and UPD well-known-ports?
0 to 1023
What does a client do when it has UDP datagrams to send?
It just sends the datagrams
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?
10 segments
Refer to the exhibit. Consider a datagram that originates on the PC and that is destined for the web server. Match the IP addresses and port numbers that are in that datagram to the description. (Not all options are used.) PC-192.1680102 connected to a switch connected Fa0/0 to Router1 with S0/0/0 connected to RS connected to another Fa0/0 to a switch connected to a Wed Server 192.168.2.2 What is the source port number?
2578
Which flag in the TCP header is used in response to a received FIN in order to terminate connectivity between two network devices?
ACK
Which two characteristics are associated with UDP sessions? (Choose two) -Destination devices receive traffic with minimal delay -Transmitted data segments are tracked. -Destination devices reassemble messages and pass them to an application -Received data is unacknowledged. Unacknowledged data packets are retransmitted.
Destination devices receive traffic with minimal delay Received data is unacknowledged.
Which three application layer protocols use TCP? (choose three.)
SMTP FTP HTTP
A host device is receiving live streaming video. How does the device account for video data that is lost during transmission?
The device will continue receiving the streaming video, but there may be a momentary disruption.
What is a characteristic of UDP?
UDP reassembles the received datagrams in the order the were received.
Why does HTTP use TCP as the transport layer protocol?
because HTTP requires reliable delivery.
What type of information is included in the transport header?
destination and source port numbers
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, without having a single data stream using all available bandwidth?
multiplexing
What information is used by TCP to reassemble and reorder received segments?
sequence numbers
What is a socket?
the combination of a source IP address and port number or a destination IP address and port number
Refer to the exhibit. Consider a datagram that originates on the PC and that is destined for the web server. Match the IP addresses and port numbers that are in that datagram to the description. (Not all options are used.) PC-192.1680102 connected to a switch connected Fa0/0 to Router1 with S0/0/0 connected to RS connected to another Fa0/0 to a switch connected to a Wed Server 192.168.2.2 What is the destination port number?
80
Which two flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (choose two.)
ACK SYN
What happens if part or an FTP message is not delivered to the destination?
The part of the FTP message that was lost is re-sent
What does TCP does if the sending source detects congestion on the path to the destination?
The source will decrease the amount of data that it sends before it must receive acknowledgments from the destination.
What is a characteristic of a TCP server process?
There can be many ports open simultaneously on a server, one for each active server application
When is UDP preferred to TCP?
When an application can tolerate some loss of data during transmission
What kind of port must be requested from IANA in order to be used with a specific application?
registered port
What happens if the first packet of a TFTP transfer is lost?
The TFTP application will retry the request if a reply is not received
Refer to the exhibit. Consider a datagram that originates on the PC and that is destined for the web server. Match the IP addresses and port numbers that are in that datagram to the description. (Not all options are used.) PC-192.1680102 connected to a switch connected Fa0/0 to Router1 with S0/0/0 connected to RS connected to another Fa0/0 to a switch connected to a Wed Server 192.168.2.2 What is the source IP address?
192.168.1.2
Refer to the exhibit. Consider a datagram that originates on the PC and that is destined for the web server. Match the IP addresses and port numbers that are in that datagram to the description. (Not all options are used.) PC-192.1680102 connected to a switch connected Fa0/0 to Router1 with S0/0/0 connected to RS connected to another Fa0/0 to a switch connected to a Wed Server 192.168.2.2 What is the destination address?
192.168.2.2
Which factor determines TCP window size?
the amount of data the destination can process at one time
During a TCP session, a destination device sends an acknowledgment number to the source device. What does the acknowledgment number represent?
the next byte that the destination expects to receive
