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What are proxy servers and how do they protect computer networks?
Proxy servers primarily stop external users who identifying the IP addresses of an internal network. Without information of the correct IP address, even the physical location of the network can't be identified. Proxy servers can make a network virtually invisible to external users.
different framing methods
Q. Describe about Domain Name Space ? - Structure for systematize the name space in which names are defined in an inverted-tree structure with the root at the top - Every l
What is point to point link? It refers to a direct connection among two computers on a network. A point to point connection does not require any other network devices other tha
Disadvantages of OSPF protocol i) Single Area ii) High Hardware Requirements iii) Troubleshooting
Q. Illustrate Keep alive and Time-Waited Timer? Keep alive timer To prevent a long inactive connection between two TCPs - Either client or server crash
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By entering a 16 as the hop count, the other routers recognize that the destination is unreachable.
Q. Show about Alternate mark inversion? Bipolar AMI - Neutral, zero voltage represents binary 0 - Binary 1s symbolized by alternating positive and negative voltages
Screening Router In this setup network router acts as a firewall. It checks all incoming and outgoing packets according to the predefined rules. This filter is placed at the c
Q. What are the basic key functions of data link layer? Ans: Data link layer transfers data in a structured and reliable manner so that the service given by the physical layer
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