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What are firewalls?
Firewalls serve to protect an internal network from external attacks. These external threats can be hackers who need to steal data or computer viruses that can wipe out data in an instant. It also stops other users from external networks from gaining access to the private network.
Question 1 Discuss the benefits and requirements of VOIP Question 2 Define the following Multicast routing protocol explain in detail with diagram Multicast backbone
Thicknet Characteristics It Supports transmission rates up to 10 Mbps in Baseband mode Less expensive in comparison of fiber-optic cable however more expensive than ot
802.11a OFDM a) Orthogonal frequency-division multiplexing utilizing a 5-GHz band b) Same as FDM except all sub bands are used by only one source at a given time c) Secu
What are the dissimilar ways authentication mechanism in VPN?
Q. Show the Flow characteristics? Flow characteristics Reliability - if lacking means that packets or ACKs are lost - more important with FTP, SMTP than with audio
Describe OSPF?
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
Define Bandwidth and Latency? Network performance is calculated in Bandwidth (throughput) and Latency (Delay). Bandwidth of a network is given by the number of bits that can be
Which of the following protocols are used for logical network addressing? Ans) Internet Protocol - IP gives routing and a one interface to the upper layers. No upper layer proto
Client Server Architecture There is an always on host called server which provides service requests to many other hosts called clients. In other words client progra
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