41 Pages

80n-week4

Course Number: CMPE 080, Fall 2009

College/University: UCSC

Word Count: 1789

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Introduction to Networks and the Internet CMPE 80N Spring 2003 Week 4 CMPE 80N - Introduction to Networks and the Internet 1 Announcements HTML tutorial on 04.29 (in class). Links to on-line HTML tutorials/tools. CMPE 80N - Introduction to Networks and the Internet 2 Layer 2: Data Link Layer CMPE 80N - Introduction to Networks and the Internet 3 Data Link Layer So far, sending signals over transmission...

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to Introduction Networks and the Internet CMPE 80N Spring 2003 Week 4 CMPE 80N - Introduction to Networks and the Internet 1 Announcements HTML tutorial on 04.29 (in class). Links to on-line HTML tutorials/tools. CMPE 80N - Introduction to Networks and the Internet 2 Layer 2: Data Link Layer CMPE 80N - Introduction to Networks and the Internet 3 Data Link Layer So far, sending signals over transmission medium. Data link layer: responsible for error-free (reliable) communication between adjacent nodes. Functions: framing, error control, flow control, addressing, and medium access (in shared networks). CMPE 80N - Introduction to Networks and the Internet 4 Medium Access Control Protocols Coordinate competing requests for medium. APPLICATION PRESENTATION SESSION TRANSPORT NETWORK LINK PHYSICAL CMPE 80N - Introduction to Networks and the Internet Sharing of link and transport of data over the link logical link control medium access control 5 Medium Access Control Problem: Computers in a shared network environment. Only one computer can transmit at a time. If two computers try to use the same line at the same time, their messages get garbled. C...

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