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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.
SONET STS SONET defines a hierarchy of signalling levels called as STSs (Synchronous Transport Signals). Every STS level supports a certain data rate specified in megabits p
Can you describeconvergence in networks?
Name the Twisted pairs cables Twisted pairs cables (Shielded and Unshielded), Coaxial cable and Fiber optic cable. ?Testing of the points ?Testing of the entire network t
What is a Database Server? With a database server, the client passes SQL requests as messages to the database server. The results of every SQL command are returned over the net
Advantage of Repeaters Repeaters provide the advantage of increasing type size of LAN or connecting LAN segments. Repeater can overcome 10 base 5 Ethernet LANM restrictio
What is the implication of increasing and decreasing subnet Bits?
FDDI Media Class B or SAS (single-attachment stations) attach to one ring Class A or DAS (dual attachment stations) attach to both rings. SASs is attached to the primary rin
MULTICASTING : The answer to above problem is multicasting. It is the normal form of broadcasting. It acts like broadcasting however it does not broadcast frames automatically
What is Security solutions Though there are a number of security solutions available due to sophistication in technology, there are a number of risks and difficulties attached
a) Manages protocol access to the physical network medium b) Permits multiple devices to uniquely signify one another on the data link layer
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