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- The model was developed by the ISO (International Organisation for Standardisation) in 1984. It is currently considered the primary Architectural model for inter-computer communications.
- The OSI (Open Systems Interconnection) reference model is a descriptive network scheme. It makes sure greater compatibility and interoperability between various types of network technologies.
- The OSI model describes how information or data makes its way from application programmes (such like spread sheets) through a network medium (such like wire) to another application programme located on another network.
- The OSI reference model divides the difficulty of moving information between computers over a network medium into SEVEN smaller and more manageable problems.
- This separation into lesser more manageable functions is known as layering.
(i) Suppose that frames are 1250 bytes long including 25 bytes of overhead. Also assume that ACK frames are 25 bytes long. a) Calculate the efficiency of stop-and-wait ARQ in
Hold-Down Timers - Routers ignore network update information for a number of periods.
TELNET Protocols The TCP/ IP protocol suite includes a simple textual remote terminal protocols called TELNET that allow a user to log into a computer across an interne
A modified NRZ code known as enhanced-NRZ (E-NRZ) operates on 7-bit words; inverting bits 2,3,6 and 7; and adding one parity bit to each word. The parity bit is chosen to make the
OSI Model Facts The OSI model classifies and organizes the methods that hosts perform to maintain data for transport across the network. You should be familiar with the OSI m
Cisco is the defaul LMI type. There are three types of LMI standards: ANSI - Annex D defined by ANSI standard T1.617 ITU-T (Q.933A) - Annex A defined by Q933A Cisco
Importace of Clientsin intranet server The most interesting thing is that almost every computer can be connected as a client to the Intranet server. The client could be based
Q. Working of TCP - buffers? TCP - buffers Sending & receiving buffers - Processes don't consume data at the same speed Sending site: - White section: unfilled
Q. Security and Reciprocity of RSA? Security and Reciprocity of RSA - Kp and N are issued publicly. - Ks is kept secret. - Since the snooper does not know p and
Question: a) In a wireless network where WEP is enforced as security mechanism, what procedure would the network manager adopt for changing WEP default keys. b) Using Pla
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