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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.
What is ESP (Encapsulating Security Payload)?
Fragmentation - Wireless environment is very noisy - Corrupt frames must be retransmitted - Large frames must be divided into smaller ones to increase efficiency
Packet loss and retransmission in TCP TCP gets reliability by retransmission. An acknowledgement is used to check that data has arrived successfully. If acknowledgement does no
QUESTION (a) Briefly describe the direct coordination model and the meeting oriented coordination model (b) What does JADE stands for? (c) Name the three spec
Explain RIB?
Coaxial Applications & Performance - Analog plus digital phone networks - Cable TV networks - Traditional Ethernet LANs - Power line and Home Networks-phone line -
Explain IBM's SNA Architecture SNA is a computer networking architecture that was formed by IBM to give a network structure for IBM mainframe, midrange, and personal computer s
show cdp is the command to verify if CDP is enabled.
Question: a) Explain briefly three typical network topologies giving one advantage and one disadvantage of each topology. Explain the three topologies with appropriate diagrams
Q. How can data to be exchanged between Networks? Internetwork Links in an internetwork
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