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The most expensive method of accessing Internet is to use leased lines which connect directly to the ISP. This will increase access rate to anywhere between 64 K and 1.5 Mbps, relying on the system in use. Equipment known as data service units (DSU) and channel service units (CSU) are set up in pairs, one pair at customer site and other at the ISP site. There is no phone dialing needed as connection is direct. Also only protocol required to complete the access is TCP/IP, for much same reason. Relying on transfer rate needed and distance between sites, cabling between them can be made with unshielded twisted-pair (UTP) copper wire or fiber optic cables.
What are the properties of E-cash? Properties: a. Monetary Value: It must be backed through either cash, bank –certified cashier’s cheque and authorized credit cards.
Why is the Wait-For-Memory-Function-Completed step required when reading from or writing to the main memory? WMFC step is needed for the write control signal / read control si
Explain Busy tone in strowger telephony. Busy tone pattern is demonstrated in figure. This is a bursty 400 Hz signal with silence era in between. The burst and silence durati
Define The Boolean algebra? A set of rules invented by the English mathematician George Boole describe certain propositions whose outcome would be either true or false with regar
With the help of R-2R binary network, explain the working of a 3-bit D/A converter and derive an expression for the output voltage. Ans: We see a 3-bit R-2R ladder D/A netwo
What are the events used for page headers and footers? The events TOP-OF-PAGE and END-OF-PAGE are used for pager headers and footers.
What is interaction modeling? Interaction model explains interactions within a system. The interaction model explains how objects interact to produce useful results. It is a ho
Instruction Length: Variable-length instructions (Intel 80x86, VAX) need multi-step fetch and decode, but permit for a much more flexible and compressed instruction set.
In binary counter the flip flop of lowest order position is complemented with each pulse. This means that JK input position must be maintained with logic one
How to get the column count of a report? SY-LINSZ system variable gives the column count (line size) and SY-LINCT for line count.
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