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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.
Nonselective fading and Selective fading Nonselective fading, is a fading in which all frequency methods of the received signal fluctuate in the similar proportions simultaneo
DNS Message There are the only two kinds of DNS message DNS query and reply messages. Further mote both query and reply message have the same format as shown in figure.
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
A layer of a glass surrounding the center fiber of glass under a fiber-optic cable.
Simple Mail Transfer Protocoland Secure Sockets Layer SMTP: Simple Mail Transfer Protocol is a server-to-server protocol for delivering electronic mail. SSL: Secure Sockets
Q. Single Mode for transmitting optical signals? - Merely one beam from a light source is transmitted using a smaller range of angles - Smaller diameter as well as lower de
Session layer examples are Netbios Names, SQL, NFS, X Windows, and RPC.
Q. Illustrate User Agent Services? User Agent (UA) Services - Provide template for user to compose a message - Reads incoming messages - Allows a user to reply to m
Recognize the command to show the status of the Frame Relay virtual circuit Ans) Router# show frame-relay pvc
What the Semantic Web is? Ans) The Semantic Web is a vision, that thinks to join together dispersed bits of data on the internet, very much like web pages are presently joined
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