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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.
Explain about the Acoustic tablet Acoustic (or sonic) tablet use sound waves to detect a stylus position. Either strip microphones or point microphones can be used to detect th
Multiprogramming or multitasking? Ans: The OS manages the concurrent execution of many application programs to make best possible use of computer resources. This pattern of si
Explain the term- Hacking Use of passwords and ids to prevent illegal access to files. Also locking the computer itself or locking computer room can help here. Encryption s
Name the two operations of stack A stack has only two operations and they are insertion and deletion of items. The operation insertion is called push (or push-down) as it can b
When calling an external report the parameters or select-options specified in the external report cannot be called.
Determine the term- Security When using Internet, security can be enhanced using encryption. Debit and credit card transactions can also be protected by a specific type of pas
Describe the term- Macros A macro is a key or name which signifies a series of commands or key strokes. Many applications allow single nominated key or single word on a keyboar
How many types of keys used to encrypt and decrypt data in Secure Sockets Layer? Two forms of keys are used as ciphers to decrypt and encrypt data. Private keys are referred to
Distinguish between combinational logic circuits and sequential logic circuits. Ans: Combinational logic circuits:- (i) Outputs only depend upon present state of the i
What is control store? The microroutines for all the instructions in the instruction set of a computer are kept in a special memory known as the control store.
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