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Firewall is a device or a component that restricts access between a protected or an internal network from an external or untrustworthy network .A firewall basically limits unauthorized network access. It acts as a guard between an internal private network or intranet and an external public network or the Internet. As it is present at a junction of two networks it allows only a selective type of traffic to pass through. In this way a firewall provides a way to implement security policies for more secure networks .
Firewalls UsesThe main use of firewalls is for security purposes. Each company devise some security policies to make its private networks secure. But to put these policies into action only firewalls provide reasonable solutions. Firewalls can help an enterprise to protect its confidential information from being stolen and stop intruders from entering their secure networks. They can also generate useful information by monitoring internal communications and can generate alarms in case of information breach. Common technical threats faced by companies include:
IP Spoofing: A technique used to gain unauthorized computer access by disguising that an IP address is coming from a trusted source.
ICMP Bombing: The Internet Control Message Protocol (ICMP) is used by the Internet routers to notify a client machine when the specified destination is unreachable. An attacker can bombard a computer with bogus ICMP messages to knock it off the Internet.
FTP Bouncing: It is used to send flood of messages to multiple recipients thus clogging their inboxes also known as email bombs.Other popular threats include attacks from curious and malicious hackers, spying, accidental disclosure of company data and denial-of-service (DOS) attacks
INTRODUCTION In this part, the topic of performance evaluation shows those parameters that are devised to calculate the performances of various parallel systems. Achieving the
Directly linked network have the lowest administrative distance of 0. They are considered the most reliable.
Mean node-node path The mean node-node path is two times the mean node-root path. Number the levels of the tree with the root as 1 and the deepest level as N. The path from t
do you do paraphrase
What is inference? Ans) The principle of "inference" is fairly a simple one: being capable to derive new data from data that you already know. In a mathematical sense, querying
Describe autonomous system?
How to define a constant variable in Java? The variable should be declared as static and final. So only one copy of the variable exists for all instances of the class and the v
Network Devices a.Hub b.Repeater c.Bridge d.Gateway e.Switch f.Router Connecting devices can classified into networking and internetworking devices when
You have been asked to design a Banking Network with two primary types of locations. Branches that will have 3 subnets, one /25 subnet one /26 subnet for ABMS and one /26 s
Explain twisted pair cable. A pair of wires twisted with each other is CALLED as twisted pair cable. A set of four pairs of twisted wires are bundled to form cable. These are
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