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Q. What do you mean by Substitutional Ciphers?
Substitutional Ciphers
Monoalphabetic Substitution
Polyalphabetic Substitution
- Transpositional - characters retain their plaintext form but change their positions to create ciphertext.
- Text is organized into a two-dimensional table and columns are interchanged according to a key.
- Character frequencies are still preserved, however.
Question: a) Briefly describe the purpose of Windows Powershell? b) Name three ways software can be installed on Linux? c) What is an interrupt request? d) As the
To accept its goals, ATM uses fixed, small sized packets known cells. Every cell has 53 octets. VPI/VCI fields shows the cells destination. PRIO say if cell can be discarded CRC
We need to design and implement a secure conference system. The system will allow users to connect to a conference server and to participate in a shared conversation. The conversat
Q. Explain about Virtual Circuit Switching? Virtual Circuit Switching - All packets belong to a message (or) session is preserved. - Single route is selected between s
State the Security concerns The history of security concerns is not new. They have been of great worry to man and for many centuries man has been endeavouring to devise new tec
SWITCHING: A switched LAN has a single electronic device that sends frames among the connected devices. A hub with several ports simulates a single shared phase. However a swi
Local information is immediate hop routing table and distance from every switch. The switches regularly broadcast topology information i.e. distance, destination. Other switches mo
802.11b HR DSSS a) High-rate DSSS using a 2.4 GHz band b) Similar to DSSS excluding for encoding method c) Uses complementary code keying (CCK), encoding 4 or 8 bits to
At the Physical layer of the OSI model Repeaters work by regenerating the signal to extend the distance it can travel.
100Base-T4 Utilizing four pairs of category 3 (voice grade) UTP to transmit 100 Mbps Two pairs are bidirectional and other two are unidirectional 8B/6T (eight bin
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