Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

NETW202 Ch 4

OSI Transport Layer

QuestionAnswer
Flow Control the management of data flow between devices in a network. It is used to avoid too much data arriving before a device can handle it, causing data overflow.
Control Data data that directs a process. a flag in a data-link frame is an example of control data.
Internet Assigned Numbers Authority (IANA) An organization that assigns the numbers important to the proper operation of the TCP/IP protocol and the Internet, including assigning globally unique IP addresses.
Well-known Ports Ports 0 to 1023
Registered Ports Ports 1024 to 49151
Dynamic or Private Ports Ports 49152 to 65535
URG Urgent pointer field significant. A 1-bit flag in the TCP header used to indicate that the receiving host should notify the destination process to do urgent processing.
ACK Acknowledgement field significant. A 1-bit flag in the TCP header that indicates the acknowledgement field is valid.
PSH Push function. A 1-bit flag in the TCP header that is used to request to the higher layers for immidiate delivery of the packet.
RST Reset the connection. A 1-bit flag in the TCP header that is used to request that a connection be re-established.
SYN Synchronize sequence numbers. A 1-bit flag in the TCP header used to indicate the initial value of the sequence number. The SYN flag is only set in the first two segments of the 3-way TCP connection establishment sequence.
FIN No more data from sender. A 1-bit field in the TCP header that is used by a device that wants to terminate its session with the other device. This is done by inserting the FIN flag in the flag field found in the TCP segment.
Acknowledgement A notification sent from one network device to another to confirm that some event has occured, such as receipt of a message.
Windows Size As filed in the TCP header that is set in a sent segment, signigies the maximum amount of the unacknowledged data the host is willing to receive before the other sending host must wait for an acknowledgement. Used for flow control.
What port number is used by HTTP? Port 80 TCP
What port number is used by SMTP? Port 25 TCP
What are two characteristics of TCP? Reliability and it resends anything not received. (Also a connection oriented protocol)
At the transport layer, what controls is used to keep a transmitting host from overflowing the buffers of a receiving host? TCP uses flow Control to avoid buffer overflows.
End systems use port numbers to select the proper application. What is the lowest port number that can be dynamically assigned by the host system? 1, 128, 256, or 1024? 1024; Ports 1024 through 59151 are the registered ports and are used by the host for dynamic port allocation.
During data transfer, what is the receiving host responsible for? Give two answers Acknowledgment & Reassembly
What are the transport layer's responsibilities? Keeping track of individual conversations between applications on source/destination hosts. OR Segmenting data and adding a header to identify and manage each segment
Why does TCP use a sequence number in the header? Sequence numbers are used because segments could arrive at their destination in a different order that when they were sent. The numbers allow the receiving host to reassemble them in the proper order.
What determines how much data a sending host running TCP/IP can transmit before it must receive an acknowledgment? It depends on the Window Size.
What is the purpose of TCP?UDP port numbers? To track the different conversations crossing the network at the same time.
What does segmentation provide to communications? Segmentation of the data, in accordance with the transport layer protocols, provides the means to both send and receive data when running multiple applications concurrently on a computer.
In networking, what is reliability? It means ensuring that each segment that the source sends arrives at the destination.
List three network applications that use TCP. Web browsing, E-mail, and file transfer.
List three network applications that use UDP. DNS, Video Streaming, and Voice over IP (VoIP)
What is contained in the header of each segment or data-gram? The source and destination port number.
What is the purpose of sequence numbers? A sequence number allows the transport layer function on the destination host to reassemble segments in the order in which they were transmitted.
Created by: AZ4ME
Popular Computers sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards