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Bridge A bridge operation sin both physical and data link layer of OSI model. At physical layer it works like repeater as it regenerates the signal and performs int
At the minimum level most networks sends individual packets of data and the network needs each packet to follow an exact format dictated by the hardware, which is known service par
how to security net
Hierarchy of DNS Servers DNS uses a large number of server organized in hierarchical fashion and distribution around the world. No single DNS server has all of the mappin
A logic gate drives a load, which has a resistance of 1 kÙ and a capacitance of 20 pF. The printed circuit track connecting the gate to its load has an 40 pF capacitance to ground.
What are the important topologies for networks? BUS topology: In this every computer is directly linked to primary network cable in a single line. Advantages: Inexpensive,
Three layers are called upper layers a) Application Layer - 7 b) Presentation Layer - 6 c) Session Layer - 5
What is the command to copy the IOS image to a TFTP server? Ans) Copy flash tftp
a. If a password to a cipher is exactly 8 characters long, and each character can be selected from [0-9], [a-z], and [A-Z], how many different passwords are possible? b. Suppose
Question: (a) What is a script kiddie? Is it a significant security threat, and why? (b) Assume that UNIX uses the user login name in lieu of the traditional salt, what is
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