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Michelle Krill

Internetworking Technology Handbook - Internetworking Basics [Internetworking] - Cisco... - 0 views

  • The upper layers of the OSI model deal with application issues and generally are implemented only in software. The highest layer, the application layer, is closest to the end user. Both users and application layer processes interact with software applications that contain a communications component. The term upper layer is sometimes used to refer to any layer above another layer in the OSI model. The lower layers of the OSI model handle data transport issues. The physical layer and the data link layer are implemented in hardware and software. The lowest layer, the physical layer, is closest to the physical network medium (the network cabling, for example) and is responsible for actually placing information on the medium.
  • Internetwork addresses identify devices separately or as members of a group. Addressing schemes vary depending on the protocol family and the OSI layer. Three types of internetwork addresses are commonly used: data link layer addresses, Media Access Control (MAC) addresses, and network layer addresses.
  • A data link layer address uniquely identifies each physical network connection of a network device. Data-link addresses sometimes are referred to as physical or hardware addresses.
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  • End systems generally have only one physical network connection and thus have only one data-link address. Routers and other internetworking devices typically have multiple physical network connections and therefore have multiple data-link addresses.
  • As with most data-link addresses, MAC addresses are unique for each LAN interface.
  • MAC addresses are 48 bits in length and are expressed as 12 hexadecimal digits.
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    An internetwork is a collection of individual networks, connected by intermediate networking devices, that functions as a single large network. Internetworking refers to the industry, products, and procedures that meet the challenge of creating and administering internetworks.
Michelle Krill

Course: IDT 688 Facilities Planning and Network Design - 1 views

    • Michelle Krill
       
      Topic 4 has the pdf's of presentations.
    • Michelle Krill
       
      Bottom 2 pdf's in section 4 are for smart learning spaces project.
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