CISCO NetAcad CCNA 1 Chapter 9 Exam

Which three application layer protocols use TCP? (Choose three.)

HTTP FTP SMTP

What is the complete range of TCP and UDP well-known ports?

0 to 1023

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.)

192.168.1.1 - None 192.168.1.2 - source IP address 192.168.2.2 - destination IP address 25 - None 2578 - source port number 80 - destination port number

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. Received data is unacknowledged.

What does a client do when it has UDP datagrams to send?

It just send the datagrams.

Which wo flags in the TCP header are used in a TCP three-way handshake to establish connectivity between two network devices? (Choose two.)

SYN ACK

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.

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 happens if part of an FTP message is not delivered to the destination?

The part of the FTP message that was lost is re-sent.

What does TCP do if the sending source detects network congestion on the path to the destination?

The source will decrease the amount of data that it sends before it must receive acknowledgements 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

What information is used by TCP to reassemble and reorder received segments?

sequence numbers

What is a characteristic of UDP?

UDP reassembles the received datagrams in the order they 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 time, without having a single data stream using all available bandwidth?

multiplexing

What kind of port must be requested form IANA in order to be used with a specific application?

registered port

Which factor determines TCP window size?

the amount of data the destination can process at one time

What is a socket?

the combination of a source IP address and port number or a destination IP address and port number

During a TCP session, a destination device sends an acknowledgement number to the source device. What does the acknowledgement number represent?

the next byte that the destination expects to receive

When is UDP preferred to TCP?

when an application can tolerate some loss of data during transmission