Ver_4_CCNA1_Module_4_study_guide - SEMESTER 1 Chapter 4 OSI...

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SEMESTER 1 Chapter 4 OSI Transport Layer V 4.0 4.1.1 What are the 4 primary responsibilities of the Transport Layer? Tracking the individual communication between applications on the source and destination hosts Segmenting data and managing each piece Reassembling the segments into streams of application data Identifying the different applications 4.1.1. 3 What does the Transport Layer header provide? binary data. This header contains fields of bits. It is the values in these fields that enable different Transport layer protocols to perform different functions. 4.1.2 Describe the process of segmentation and reassembly? Most networks have a limitation on the amount of data that can be included in a single PDU. The Transport layer divides application data into blocks of data that are an appropriate size. At the destination, the Transport layer reassembles the data before sending it to the destination application or service. How does the Transport Layer accomplish conversation multiplexing? Each of these applications or services is assigned an address known as a port so that the Transport layer can determine with which application or service the data is identified. What are the four additional duties the Transport Layer can provide? Connection-oriented conversations Reliable delivery Ordered data reconstruction Flow control 4.1.2. 2 What are the four processes that the Transport Layer uses to control conversations? Establishing a session Reliable Delivery Same Order delivery Flow control 4.1.3 What does reliability mean to a network? ensuring that each piece of data that the source sends arrives at the destination What are the three basic operations of reliability at the transport layer? tracking transmitted data acknowledging received data retransmitting any unacknowledged data What trade-off is necessary to ensure reliability? a trade-off between the value of reliability and the burden it places on the network. How is a best-effort protocol different than a reliable protocol? because there is no acknowledgement that the data is received at the destination. What is another term used to describe a best-effort protocol? unreliable, List some examples of databases, web pages, and e-mail,
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applications that require reliable transmission. Give an example of an application that can use unreliable transmission. Streaming video or IP phone Know the information in the diagram that lists the differences between unreliable and reliable transmissions. 4.1.4 What are the two most common protocols at the Transport Layer? User Datagram Protocol (UDP) Transmission Control Protocol (TCP) What is the advantage of using UDP? providing for low overhead data delivery What are the pieces of UDP information called? datagrams What are some applications that use UDP?
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  • Spring '09
  • Rusty
  • Transmission Control Protocol

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