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Virtual private networks VPNs based Guide series from Cisco Press the traditional leased lines offer organizations �.
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Virtual private networks VPNs based Guide series from Cisco Press the traditional leased lines offer organizations �.
LAYERS When it comes to communications, all of these standard organizations have one primary function: the creation of standards that can be combined with others to create a working network. On the sending side, TCP passes segments to the IP layer for encapsulation in packets, which the IP layer in hosts and routers route connectionlessly to the destination host. The data link layer usually adds both a header and trailer to the data presented by the network layer. Note that error recovery usually consists of both error-detection and errorcorrection protocols. Other speciications include the level of enterprise network and transmitted data security.
