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In broadcast topology there are further two types
1) SATELLITE\RADIO 2) RING TOPOLOGY
In a radio or satellite topology every computers are connected to each other via radio or satellite wave as given in the figure.
Figure: Satellite and Ring topologies:
In a ring topology every computer is connected to thorough a ring as given in the figure above.
Question: (a) Which of the following is not a goal of security: i) detection ii) prevention iii) recovery iv) prosecution (b) You are an honest student. One day you
what is guided media or unguided media
Hypothetical reliable data transfer protocol: A jumping window based Go-back-N ARQ protocol for file transfer using UDP as the transport protocol: In this protocol, a window o
In the e-mail system, where the e-mail messages are saved and why? E-mail messages are saved in user’s private electronic mailbox. A mailbox refers to a local/domestic hard drive c
A digital signature is a stamp on the data, which is unique and very hard to forge. A digital signature has 2 steps and creates 2 things from the security perspective. STEP 1
Gateways They transfer packets among network machines that have different protocols (e.g. between a WAN and a LAN). They access a packet formatted for one protocol and change
Question : (a) Distinguish between authorization and authentication. (b) SSO (Single Sign On) implies a user logs in once and can access resources for a defined period of
Electronic Mail: Electronic mail which is famous as e-mail, as it is known to its number of users, has been around for more than two decades. Before 1990, it was mainly used in
VIRTUAL PACKETS These data packets serve same reason in Internet as frames on LAN. Every packet has a header. Routers, which are normally gateways, transfer packets between ph
Confidentiality Confidentiality of information ensures that only those with sufficient privileges may access specific information. When unauthorized individuals can access inform
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