Chapter04 - Chapter 4: Managing LAN Traffic Frames Frame is...

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Chapter 4: Managing LAN Traffic
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Frames Frame is the term used to describe data transmitted at Layer 2 of the OSI model. The source and destination addresses are MAC addresses . Frames contain information which helps receiving hosts determine if the frame has become corrupted during transmission. Hosts receiving frames drop the destination address of the frame that does not match their MAC address.
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Frame Traffic Unicast frames are sent from one host to another single host. Unicast frames are the most common type of LAN traffic. Broadcast frames are sent from one host to all hosts and are not passed across routers. Broadcast frames are addressed to MAC address FF-FF-FF-FF-FF-FF. Multicast frames are sent from one host to a small group of hosts. There can be several multicast groups on a single LAN.
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Datagram Also known as a packet , datagrams represent traffic at Layer 4 of the OSI model. Datagrams differ from frames in that they have Layer 4 addressing information, such as a source and destination IPv4 address. As a datagram is passed from router to router, it retains its original IPv4 addressing information. The MAC address information, however, is changed as the router that was once the frame’s destination becomes its source as it travels further across the network.
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ARP Request Stands for Address Resolution Protocol. Way that a host determines a computer’s MAC address from its IP address . Broadcast frame sent out with the query “who owns this IP address?” Unicast frame is sent back with MAC address information of target host.
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Collision and Broadcast Domains A collision domain is a section of network where packet collisions can occur if two nodes attempt to communicate at the same time. A
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This note was uploaded on 09/19/2010 for the course LAN 237898 taught by Professor Johns during the Fall '10 term at Allen County Comm College.

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Chapter04 - Chapter 4: Managing LAN Traffic Frames Frame is...

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