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14 Cards in this Set
- Front
- Back
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What is the purpose of the Transport layer? |
- Establishing a temporary communication session between two applications and sending data between them. |
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What are the responsibilities of the a Transport layer? |
- Tracking individual conversations - Segmenting data and reassembling segments - Identifying the applications to send data to the right one |
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What is Conversation Multiplexing? |
- Sending segments from different communications alternately down a communication line to increase efficiency |
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What makes TCP reliable? |
- Numbering and tracking segments - Acknowledging received data - Resending and unacknowledged data after a set time period |
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Why is UDP unreliable? |
- It requires no acknowledgement from the receiver and doesn't resend any data |
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What are 2 examples of applications of UDP? |
- Streaming Video - IP Telephony |
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What are 2 applications of TCP? |
- HTTP - SMTP |
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What are the features of TCP? |
- Establishing a session - Same order delivery - Reliable delivery - Flow control |
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How does the transport layer manage multiple conversations? |
- It uses different port numbers in the UDP headers of segments |
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What does the Netstat command do? |
- Lists all protocols in use on the device alongside the local and foreign IP addresses and ports. |
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How many bytes does a TCP header add? |
- 20 |
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How many bytes does a UDP header add? |
- 8 |
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What are the main 3 flags used in TCP establishment? |
- SYN - ACK - FIN |
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What does window size determine? |
- The amount of bytes of data that can be sent before acknowledgement is required |
