FUNDAMENTALS OF COMPUTER

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COMPUTER THREATS SECURITY

WHAT IS A FIREWALL IN NETWORK SECURITY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
To increase security on your company’s internal network, the administrator has disabled as many ports as possible. Now, though you can browse the internet, you are unable to perform secure credit card transactions.Which port needs to be enabled to allow secure transactions?
A
69
B
21
C
23
D
80
E
443
Explanation: 

Detailed explanation-1: -Which port needs to be enabled to allow secure transactions? EXPLANATION To perform secure transactions, SSL on port 443 needs to be enabled. HTTPS uses port 443 by default.

Detailed explanation-2: -A firewall is software or firmware that prevents unauthorized access to a network. It inspects incoming and outgoing traffic using a set of rules to identify and block threats.

Detailed explanation-3: -A firewall appears as a single address to the public. The firewall provides access to the untrusted network through proxy or SOCKS servers or network address translation (NAT) while hiding your internal network addresses. Consequently, the firewall maintains the privacy of your internal network.

Detailed explanation-4: -Only specific ports should be allowed. In the case of a web server, it is appropriate to allow ports 80 (HTTP) and 443 (HTTPS). Allow ANY WEB-SERVER HTTP is a solid general rule to follow. TCP ANY WEB-SERVER 3389 – Allows RDP access to the webserver from any source.

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