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802.11 DSSS a) Direct sequence spread spectrum in a 2.4 GHz band b) Each bit is replaced by a sequence of bits called a chip code, implemented at the physical layer c) Se
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:
Q. Explain the process of piggybacking? When a data frame arrives in its place of immediately sending a separate control frame and the receiver restrains itself and waits until
Need for standards - Over the past couple of decades several of the networks that were built used different hardware and software implementations therefore they were incompatib
Single company or organization owns this. They are usually LAN technologies. There can be multiple LANs in a campus or building linked together. They are sometimes known Intranet.
What is the disadvantage of a star topology? One major drawbacks of star topology is that once the central hub or switch get damaged, the whole network becomes unusable.
In this question, you will compare delays in packet switching (i.e. in IP networks), in circuit switching (i.e. in PSTN telephony) and in virtual circuit packet switching (i.e. in
Question 1 Who initiates the ‘Trap' message? When is this message generated? Question 2 Discuss the features of a typical Network Management System.List (Fault Management,
What is DoS? A do, or Denial-of-Service attack, is an attempt to stop users from being able to access the internet or any other network services. Such attacks might be come in
Other than performance issues, there could be security reasons for using something like xinetd. Make simple design in which a new version of xinetd gives a layer of security.
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