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Efficiency of a data communications system depends on three fundamental characteristics
- Delivery: The system should deliver data to the correct destination. Data should be received by the intended device or user and only by that device or user
- Accuracy: The system should deliver the data accurately. Data that have been altered in transmission as well as left uncorrected are unusable
- Timeliness: The system should deliver data in a timely manner. Data delivered not on time are useless. Delivering the data in the similar order that they are produced and without significant delay (real time transmission)
Disadvantages You typically would not use a packet filter as your only security solution for your network packets filters have two major disadvantages. a. Low securit
802.11a OFDM a) Orthogonal frequency-division multiplexing utilizing a 5-GHz band b) Same as FDM except all sub bands are used by only one source at a given time c) Secu
Q. Flow control in TCP? The amount of data a source is able to send before receiving an ACK from the destination Whether to send 1 byte of data as well as wait for ACK
OSPF ( open Shortest Path First) Open shortest path first is a routing protocols developed for internet protocols networks by the interior gateway protocols working group
At the minimum level most networks sends individual packets of data and the network needs each packet to follow an exact format dictated by the hardware, which is known service par
What is a LAN? LAN stands for Local Area Network. It refers to the connection among computers and other network devices that are located within a small physical location.
WAN -Wide Area Network
features
Q. Show Nonreturn to Zero encoding? - Value of signal is for all time positive or negative - NRZ-L Signal level depends on bit represented; positive typically means 0
What are the different kinds of OSPF timers?
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