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  • How can I define the layered approach to protocols?

    Learn what the network security advantages are in the layered approach to protocols and how to define the layered approach protocol, in this Q&A with Michael Gregg. 

  • flooding

    In a network, flooding is the forwarding by a router of a packet from any node to every other node attached to the router except the node from which the packet arrived. 

  • automatic repeat request (ARQ)

    Automatic repeat request (ARQ) is a protocol for error control in data transmission. 

  • variable-length subnet mask (VLSM)

    A variable-length subnet mask (VLSM) is a sequence of numbers of variable length that streamlines packet routing within the subnets of a proprietary network... (Continued) 

  • wildcard mask

    A wildcard mask is a sequence of numbers that streamlines packet routing within the subnets of a proprietary network... (Continued) 

  • fixed-length subnet mask (FLSM)

    A fixed-length subnet mask (FLSM) is a sequence of numbers of unchanging length that streamlines packet routing within the subnets of a proprietary network... (Continued) 

  • What are the routing differences between IPv4 and IPv6?

    Between IPv4 and IPv6, find out how routing differs, in this Q&A with Silvia Hagen. 

  • In IP, could we eliminate the need for ARP?

    Could ARP be eliminated from IP? Silvia Hagen explains in this Q&A. 

  • Can I connect WLAN and LAN clients using 802.1x and EAP?

    Learn how to connect wireless and wired LAN clients using 802.1x and EAP with a workgroup instead of an Active Directory Domain in this Q&A with Lisa Phifer. 

  • Choosing WAN providers: Key questions to ask

    When evaluating carrier services for the WAN, it's imperative to ask some key questions regarding customer service, service-level agreements, global coverage, management and monitoring capabilities, and underlying technologies. Make sure these questi...