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Q. Explain about Error Detection?
Data can be corrupted during transmission because of accidents, Storms, sudden increase in electricity and voltage / decrease in signal power over distance
For reliable communication errors should be detected and corrected
Efficiency of a data communications system depends on three fundamental characteristics - Delivery: The system should deliver data to the correct destination. Data should be r
Q. Describe about Cryptography? - Some media cannot be protected from unauthorized reception (or interception) - Encryption involves transforming the original information in
Take the maximum packet lifetime, T. It's stated that T must be big enough to make sure the packet and its ACK have vanished. Why do we have to have the ACK?
Consider the similar conditions as the last problem, except for the following: what's the minimum possible response time for the 1 Gbps and a 1 Mbps line? What does the diffrentia
What is the advantage of address sharing? By using address translation instead of routing, address sharing gives an inherent security benefit. That's because host PCs on the In
Electronic Mail One of the most popular internet services is electronic mail ( e mail). At the beginning of the internet era teh message sent by electronic mail were sh
Sharing information To understand how distance vector routing works examine the internet shown in the clouds represents local area network . the number inside each c
What is backbone network? A backbone network is a centralized infrastructure that is intended to distribute dissimilar routes and data to various networks. It also handles mana
What is Protocol Data Unit? The data unit in the LLC level is known as the protocol data unit (PDU). The PDU having of four fields a destination service access point (DSAP), a
Neighbor terminology mean in EIGRP?
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