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TWO DIFFERENT KINDS OF TOPOLOGIES:
LOGICAL TOPOLOGY:
It is described by the specific network technology.
PHYSICL TOPOLOGY:
It relays on the wiring scheme.
NETWORK INTERFACE CARD AND WIRING SCHEMES:
Figure
To allow modifying the wiring without modifying the interface hardware, NICs support multiple wiring methods. it is given in the figure below.
Question : (a) Several techniques are now available for users to connect to the Internet. (i) A modem is commonly used to dial up to the Internet. Why is a modem needed fo
In this part we shall give a short description of the routines in the PVM 3 user library. Each PVM program should include the PVM header file "pvm3.h" (in a C program) or "fpvm3.h"
confiriguration,capabilities,implementation
Message passing is probably the most extensively used parallel programming paradigm today. It is the mainly natural, portable and efficient approach for distributed memory systems.
Q. Show the Masking process? Masking Take out the address of the physical network from an IP address Used by routers inside the organization
what is cryptography
What is Microwave? Microwaves have been used in data communications. Microwave has a higher frequency than radio waves and thus can handle larger amounts of data.
Example of transport layer are:- a) TCP is connection oriented. b) UDP is connectionless
Consider a signal x(t) = 10 cos(2πfct + 4 cos 2πfmt). Assume frequency modulation. The message frequency fm = 2:3 kHz. Calculate the modulation index and find the bandwidth when
Question: (a) Distinguish between Flow Control and Congestion Control. (b) Explain clearly how a URL is resolved by a computer. (c) List one application that uses TCP
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