quiz2 - Lecture 7 Hardware addresses Static (MAC),...

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Lecture 7 Hardware addresses – Static (MAC), Configurable, Dynamic A special broadcast address is used to identify broadcast messages, which are captured by all stations (FF.FF.FF…) A host computer or host is any system that runs applications and is attached to an internet Prefix identifies the network and the type of network to which a host computer is attached Suffix identifies a host computer within that network Lecture 9 TCP/IP layer – 5 layers: layer 5-1: Application (used for communication among applications), Transport (provides reliable delivery of data), Internet (Defines uniform format of packets forwarded across networks of different technologies), Network Interface (defines formats for carrying packets in hardware frames), Hardware (defines basic networking hardware) Transport protocols - Provide end-to-end connectionless data delivery (User Datagram Protocol - UDP ), Provide reliable connection-oriented data delivery (Transmission Control Protocol - TCP ) Internet Protocol (IP) provides "unreliable" datagram service between hosts Routers forward datagrams between physical networks. Datagrams are encapsulated in hardware frames for delivery across each physical network. Datagrams can have different sizes. Header area usually fixed (20 octets). Data area can contain between 1 octet and 65,535 octets Routing tables – stored forwarding information. Must be updated as network topology changes.Can be kept small by listing destination networks rather than destination hosts. Destination stored as network address . Next hop stored as IP address of router. Address mask defines how many bits of address are in prefix (how much of address used to identify network) default route - Entry used if destination network is not explicitly listed in routing table Network interface layer takes two parameters: IP datagram, Next-hop address IP does not guarantee prevention of: Duplicate datagrams, Delayed or out-of-order delivery, Corruption of data, loss User Datagram Protocol (UDP) - delivers datagrams between applications and/or processes on host computers UDP Characteristics : End-to-end (can distinguish among multiple applications running on one host), Connectionless(each packet handled as separate transmission), Message-oriented (sends and receives individual messages), Arbitrary interaction (send to / receive from multiple applications), Operating system independent Lecture 10 Internet layer - IP - can detect and report errors without actually fixing them. Focuses on datagram delivery User Datagram Protocol (UDP) provides end-to-end datagram service Transmission Control Protocol (TCP) provides reliable data delivery TCP Uses IP to provide reliable data delivery, Compensates for loss, delay, duplication and similar problems in Internet components TCP characteristics : Connection oriented : Application requests connection to destination and then uses connection to
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This note was uploaded on 04/15/2008 for the course CS 372 taught by Professor Leviet during the Summer '07 term at Oregon State.

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quiz2 - Lecture 7 Hardware addresses Static (MAC),...

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