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how many types of backups are there & explain them in
theory mode & practical mode?
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Which one is not done by Data link layer ? bit stuffing, LRC,CRC,parity check
Explain Network Topologies and their uses.
TCP/IP can work on a)ethernet b)tokenring c)a&b d)none
What is Beaconing?
Explain the following ARQ techniques in detail 1. Stop and wait ARQ 2. Selective repeat ARQ
what is the role of Domain controller in lan ? What is the active directory ?
Differentiate between Optical fibre and twisted pair
x.25 protocol encapsulates the follwing layers a)network b)datalink c)physical d)all of the above e)none of the above
Differentiate between IEEE 802.3, IEEE 802.4 and IEEE 802.5 standards.
The physical layer service is a non-confirmed service. Assume that some bits of data are lost during transmission over physical media, which layer will detect the loss and take some remedial measures. Explain any one method clearly depicting how this operation is performed.
Can a machine with a single DNS name have multiple IP addresses? If so give a possible example. If not then explain why not?
Write two ways in which computer applications differ from network applications ?
Networking Protocols 
