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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 a system requires passwords be 8 characters long, include at least one capital letter, at least one digit and at least one character from the set of 5 special characters { !,#,%,&,*} . What advantage does this provide an attacker who is trying to guess a password?
Extranet and Intranet An Extranet is a type of Intranet (Internal TCP/IP Network) that has been selectively opened to a firm's suppliers, customers. Intranet An intrane
What is one basic requirement for establishing VLANs? A VLAN needs dedicated equipment on each end of the connection that permits messages entering the Internet to be encrypted
Q. Explain Types of Redundancy Checks? Parity Check Simple Parity Check Two Dimensional Parity Check / Longitudinal Redundancy Check (LRC) CRC (Cyclic Redund
In formation sharing at regular intervals For example every 30 seconds each router sends its information about the whole network to its neighbours. This sharing occurs
PACKET SWITCHES: To span large distances or several computers, networks must removed shared phase with packet switches. Each switch moves whole packet from one connection to
explaination of framing in datalink layer .
Role of Software in Intranet For an Intranet to be successful, it must have strong software support. In this section, a brief description of the operating system, groupware an
Cube: It's a 3 dimensional interconnection network. In Cube PE s are organised in a cube structure. Figure 11: Cube interconnection network
State the congestion avoidance process Notifies the source that congestion avoidance process should be initiated where applicable for traffic in the opposite direction of the r
What is difference among routing and routed protocols? Ans) i) Routing use for top path selection ii) Routed protocol carries on source and destination information.
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