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Virtual Private Network (VPN) adds the features of both public and private networks. It is fixed to single organization and needs public network for connectivity.
These connections are sometimes known tunnels and connect sites. Every site sees tunnel as point-to-point link. There is no access for other clients of public networks.
GUARANTEEING ABSOLUTE PRIVACY:
In addition to restricting data packets, VPN machines use encryption to sure absolute privacy. Even if an outside does manage to retain a copy of the data packet the outside will be unable to interpret the message.
Addressing Complicated addressing scheme because there may be intermediate stations (APs), identified by flags
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SONET Frame Format SONET uses a basic transmission rate of STS -1 that is equivalent to 51.84 mbps. Higher level signals are integer multiples of the base rate. For exa
What is uniform delivery time A uniform delivery time is required for voice, so amount of jitter in net- work is significant. This could be expressed as standard deviation of d
What is a Multiplexor
Question: The input to the circuit in the figure is a square wave that is symmetrical about 0V. Sketch the output waveform.
What is TDM? TDM is a digital process that can be applied when the data rate capacity of the transmission medium is greater than the data rate needed by the sending and receivi
Question: a) Describe the following two approaches used towards wireless frequency regulation. i. Regulated Band ii. Unlicensed Band b) An antenna is an electrical c
Name the layer responsible for putting 1s and 0s into a logical group? Ans) Frames are broken down into 1s and 0s and placed onto the physical medium by the Data Lin layer.
Q. What is Retransmission timer? Retransmission timer if an ACK is received previous to the timer goes off - destroy the timer if the timer goes off before ACK a
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