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A communications channel is pathways over which information can be communicate. It may be described by a physical wire that connects communicating devices, or by a radio, laser, or other radiated energy source that has no clear physical presence. Information sent by a communications channel has a source from which the information originates, and a destination to which the information is delivered. Although information originates from a one source, there may be more than single destination, depending upon how many receive stations are related to the channel and how much energy the transmitted signal possesses.
Along any transmission path from a given source to a given destination, a group of virtual circuits can be grouped together into what is known as path.
Command Structure: Commands are all-upper-case strings, either 4 or 6 characters in length. Table 1 shows the commands, and (for method commands) the parameters, return values, ex
Token Passing - Token Ring (IEEE 802.5) Needs that station take turns sending data Token passing coordinates process Token is a especially formatted three-byte fr
Normal 0 false false false EN-IN X-NONE X-NONE Metropolitan area Network ( MAN) Metropoli
OSI= Open System Interconnection.
What is ESP (Encapsulating Security Payload)?
Control Frame: claim_token Consider first station turned on Station notices no tokens Sends claim_token No competitors, so makes a ring of just itself P
Configure VTP Pruning on the Switches VTP pruning permits a VTP server to suppress IP broadcast traffic for particular VLANs to switches that do not have any ports in that VLAN
Q. Define Guided Media? - Offers a conduit from one device to another - Signal is directed as well as contained by physical limits of medium - Twisted-pair and coaxial ut
how does PPTP express the data?
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