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What is an Ethernet?
The Ethernet topology was developed at the University of Hawaii to connect computers on the many Islands. It was radio based design. Later, Robert Metacalfe went to Xeros's Palo Alto Research Center (PARC) laboratories and eliminated the radio portion and altered to co-axial cabling. Ethernet is one of the most popular LAN technologies in use today covering more than 85% of the networks. Ethernet system having of three basic elements:
4. The physical medium use to carry Ethernet signals among computers on the network
5. A set of rules (protocols) embedded in every Ethernet interface that will decide how multiple computers on the network will have access to the data on the medium.
6. An Ethernet frame that having of a standardized set of bits used to carry data over the system.
Fragmentation - Wireless environment is very noisy - Corrupt frames must be retransmitted - Large frames must be divided into smaller ones to increase efficiency
Computer Networks A computer networks can be defined as set of computer that interact among the individual computers sharing resources or information. Reference models
TCP/IP is a name provided to the collection (or suite) of networking protocols that have been used to construct the global Internet. The protocols are also referred to as the DoD (
VPN Technology For an organization VPN technology uses some main techniques for privacy a.Encryption /Authentication b.Tunnelling c.Fire walls
how does the near/far effects infulence TDMA system?what happen CDMA system? what are countermeasures in TDMA system/
how can u identify the ip class of given ip address
what is due care
Can you define the method of demilitarized zone?
Q. What is Shielded Twisted Pair? - A metal foil or braided-mesh covering encases every pair of insulated conductors to prevent electromagnetic noise called crosstalk - Cros
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