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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?
A logical circuit that is created by Virtual channel links. It carries data among two endpoints in a network. The one more name for Virtual Channel is Virtual Circuit.
NETWORK MANAGEMENT & SECURITY 1. Describe a basic communication model. 2. State the following terms: a. Configuration Management b. Fault Management c. Security Management
What is WDM? WDM is conceptually the similar as FDM, except that the multiplexing and demultiplexing includes light signals transmitted by fiber optics channel.
Describe the concept of broad cast and multi-cast?
You are a system administrator on a NetWare network, you are running NetWare 4.11 and you cannot commune with your router. What do think what problem is? Ans)NetWare 4.11 defau
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CONNECTION TO PACKET SWITCHES: A packet switch many join to devices and to other packet switches. But the speeds are different in both parts. There are typically high-speed j
what is routing
Q. Flow control in TCP? The amount of data a source is able to send before receiving an ACK from the destination Whether to send 1 byte of data as well as wait for ACK
Security risks present on the networks Lots of risks are present everywhere on Internet as well as on Intranet, if it is not known what is being done. Every day a number of
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