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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?
Briefly write functionalities of different OSI layers? The OSI Reference Model includes seven layers. Basic functionality of each of them is as follows: 1. Physical Layer:
Challenge Handshake Authentication Protocols (CHAP) CHAP as its an implies implements a form of authentication that requires a challenge and a response. A CHAP authenticator
Connecting Devices of bridges - Five kinds: - Repeaters - Hubs - Bridges - Two- and three-layer switches - Repeaters and hubs - layer one of Internet model -
These are fully-loaded machines which consists of multiprocessors, high-speed disk arrays for interview I/O and fault tolerant features.
Explain L2F protocol?
What is ESP (Encapsulating Security Payload)?
What are the drawbacks of ARCNet? Here are some drawbacks of ARCNet: 1. Standard ARCNet is very slow (2.5 Mb/s). It is almost seven times slower than Token Ring. 2. ARC
Reliable Data Transfer Figure illustrate the framework for reliable transfer. The service abstraction provided to the upper layer entities is that of a reliable channel
How does IGRP measure metric
Explain about the Middleware support All the connectivity interface related tools come under the category of middleware. Middleware provides the link for data exchange between
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